Solar Charge Controller Settings
A solar charge controller has various settings that need to be altered for it to function properly, such as voltage ampere settings. Today you will get to know about solar charge controller settings along with solar charge controller voltage settings.
Solar Charge Controller
The amount of power generated from the solar panel travels to the inverter batteries. This power needs to be maintained and regulated. A solar charge controller is used for this purpose. It sends short energy pulses to the battery. The average output produced by an MPPT solar charge controller can be 42 volts. You will require additional batteries to produce higher voltages. Here is the catch: to prevent your batteries from damage, you need to choose the right solar charge controller.
Solar Charge Controller Settings
Just installing a charge controller won’t solve all your problems. There are different settings that need to be checked and manually adjusted. Different types of batteries like Lithium Iron Phosphate (LIPO), lithium, iron phosphate, lead-acid, and Absorbent Glass Mat (AGM) batteries have different settings. However, there are only two types of charge controllers.
MPPT controller or maximum power-point tracking controller
PWM controller or pulse width modulation controller
Before starting to set up the solar charge controller, you need to understand its functioning of it. Here are the points that you need to keep a note of while installing and setting up the solar charge controller.
Once the battery is fully charged, the battery will not hold more solar energy in comparison to the chemical content.
- If the battery is charged high, it can result in the development of heat and gas inside the battery.
- Electrolytes inside the battery began to expand. This further led to the development of bubbles.
- This chemical process leads to the generation of hydrogen gas, which is explosive.
- An overcharged battery will decrease the capacity and increase the aging process of the battery.
The Parameters:
Battery Floating Charging Voltage
The voltage at which a battery is maintained once it is fully charged is known as the battery floating charging voltage. This voltage maintains the capacity of the battery by self-discharging it. The typical voltage for a 12V system is 13.7V and for a 24 V system, it is 27.4V. 58.4V is the voltage for a 48V system.
Battery Over-Discharging Protection Voltage
It is also known as under voltage cutoff voltage and its value should also be in accordance with the battery type. In solar charge controller settings, the voltage value range for a 12V system is 10.8V to 11.4V. For a 24V system, it is 21.6V to 22.8V, and 43.2V to 45.6V for a 48 V system. So, the typical values are 11.1 V, 22.2 V, and 44.4 V.
Battery Overcharging Protection Voltage
This voltage value should be set as per the battery type. This voltage is also termed a fully charged cutoff voltage or over-voltage cutoff voltage. This voltage value for a 12-volt system ranges between 14.1 V and 14.5 V. For a 24-volt system, it is 28.2V to 29V and for a 48V system, it is 56.4V to 58V. So overall, the typical value for the voltage is 14.4V, 28.8V, and 57.6V.
Charge Controller Capacity
It is the maximum number of amperes that your solar charge controller can handle. It is the parameter on the basis of which a solar charge controller is rated. It can be 10A, 20A, 30A, 40A, 50A, 60A, 80A, or 100A.
Maximum Charging Current
It is the maximum output current of the solar panels or solar arrays. It is the output that you receive from the batteries.
System Voltage
It is also known as the Rated Operational Voltage of your solar power system which refers to the battery bank voltage (direct current operational voltage). Usually, the value is 12V, 24V, or 48V. However, a medium-scale or a large-scale charge controller system has voltage values of 110V and 220V.
Solar Charge Controller Voltage Settings
These are the most critical settings that need to be done carefully for the better functioning of the solar charge controller. A solar charge controller is capable of handling a variety of battery voltages ranging from 12 volts to 72 volts. As per the basic solar charge controller settings, it is capable of accommodating a maximum input voltage of 12 volts or 24 volts.
You need to set the voltage and current parameters before you start using the charge controller. This can be done by adjusting the voltage settings. Here is the list mentioning the most critical voltage settings for the solar charge controller.
- Absorption Duration: (Adaptive/Fixed)
- Absorption Voltage: 14.60 volts
- Automatic Equalization: (Disabled / Equalize every X Days) Disabled
- Equalization Current Percentage: 25%
- Equalization Duration: 4 hours
- Equalization stop mode: (Fixed Time / Automatic on Voltage) Fixed time
- Equalization Voltage: 14.40 volts
- Float Voltage: 13.50 volts
- Low-Temperature Cutoff (optional): Disabled
- Maximum Absorption Time: 6 hours to 3 minutes (max) per 100Ah battery capacity
- Maximum Absorption Rate: 30 minutes per 100Ah battery capacity
- Manual Equalization: Select start now
- Maximum Equalization Duration: 3-4 hours
- Re-Bulk Voltage offset: 0.1 volts
- Tail Current: 2.0A
- Temperature Compensation (mV/°C): 27.7 volts / 40° Celsius-25° Celsius
Note: Settings can be changed manually on the controller or from the PC Software. Follow the instructions of the manufacturer for the best results.
Steps in Solar Charge Controller Settings
While you set up your new solar charge controller, you should begin with properly wiring the controller to the battery bank and solar panels properly. Once the wiring is properly done and the controller detects the power, its screen will light up. Other steps are as follows:
Enter the settings menu by holding the menu button for a few seconds.
Charge current PV to Battery will be displayed
Battery Type Selection can be done by pressing the menu button for a long time.
The battery voltage will be auto-detected by the controller.
According to the user manual, set the setting for absorption charge voltage, low voltage cutoff value, float charge voltage, and low voltage recovery value.
If the system has an option for setting up the discharge value for DC, then set it as per the user manual.
Once the setting is done, the charge controller will instantly start the charging process.
PWM Solar Charge Controller User Manual
The user manual of a PWM or a pulse width modulation solar charge controller contains information regarding the following:
LCD Display or Key
A solar charge controller has a digital display that displays a number of things on the panel through abbreviations or signs and symbols. Here is the list of those things and what they mean.
- A panel with a small sun shining indicates the solar panel charge.
- An arrow near the panel when it is bold black means the system is on Aqualation or buck when the arrow is flicking it means it is on float mode.
- A square filled with horizontal bars indicates battery.
- Near the battery sign, there is an arrow indicating the output.
- A bulb sign indicates the load
- V% indicates the voltage
- AH is for ampere hours
- A square-shaped box indicates a menu. It is used for switching between different displays. You can enter or exit the setting by pressing it for a long time.
- An up arrow is used to increase the value
- A down arrow showing a decrease in the value
LCD Display or Setting
To browse different interfaces in the solar charge controller settings, press the menu button. The LCD or key display discussed in point 1 is the main display. Next displays in order when you press the menu are:
- FloatVoltage – The screen shows LIT, voltage, and the battery
- Discharge Reconnect – Shows LIT, voltage, battery, output (arrow), and load (bulb)
- Under voltage Protection – Displays LIT, voltage, empty battery symbol, and load (bulb)
- Work Mode – It displays hours (H), output (arrow), and load (bulb). OH, means dawn to dusk, 24H means load output is for 24 hours, and 1-23H means the load is on after sunset and closed after sunrise hours.
- Battery Type – LIT and the battery box with horizontal bars, determine the amount of battery charged and the type of battery. LIT is for lithium. After this, you are again on the main display.
Important: To switch On or Off the load manually on the main display, press the down key.
Product Features
- 3-stage PWM charge management
- A built-in industrial microcontroller with adjustable parameters
- A pulse width modulation solar charge controller has the following features:
- Battery Switching functions between lithium and lead battery. The lithium battery is the default setting and switches it to the battery type interface by holding it for 3 seconds.
- Dual metal–oxide–semiconductor field-effect transistor (MOSFET) Reverse current protection with low heating dissipation
- In-built protection for short-circuit open circuits, overload, and reverse
Safety Instructions
Every electrical appliance comes with a list of safety instructions that are prepared according to the appliance. A PWM controller has the following safety instructions mentioned in its user manual.
- Do not connect another charging source with the charge controller. The controller is suitable only for regulating solar modules.
- For the controller to recognize the battery type, ensure the battery has enough voltage before you begin the installation process.
- Install the controller on a well-ventilated and flat surface. While running, the controller will be heated.
- This controller is suitable for lithium batteries. All kinds of lead batteries (open, AGM, and gel) are also compatible with it.
- To minimize loss, keep the battery cable as short as possible.
System Connection
In solar charge controller settings, it contains instructions related to the connection. It tells you which port you need to connect to which wire.
- Connect the battery to the charge regulator (plus and minus)
- Connect the consumer to the charge regulator (plus and minus)
- Connect the photovoltaic module to the charge regulator (plus and minus)
Technical Parameter
This section contains all the information regarding the voltage, amperes, input, output, size, weight, etc. of the PWM solar charge controller.
- Batt voltage – 12 volts / 24 volts auto adapt.
- Charge current – 10A (KYZ 10), 20A (KYZ 20), 30A (KYZ 30)
- Discharge current – 10A (KYZ 10), 10A (KYZ 20), 10A (KYZ 30)
- Max solar input – less than 41 volts
- Model – (KYZ 10) (KYZ 20) (KYZ 30)
- Operating temperature –.35 ~60° Celsius
- Size or weight – 13370355 millimeters or 140 grams
- Standby current – greater than 10 mA
- USB output – 5 volts / 2 A Max
The technical parameters of lithium and lead batteries under certain parameters are mentioned in the table below.
| Type of Battery | Equalization | Float | Undervoltage Protection | Discharge Reconnect |
| Lithium (LIT) battery | 12.8 volts | 12.0 volts (default, adjustable range 11.5-12.8 volts) | 10.7 volts (defaults, adjustable range 9.0-11.0volts) | 11.6 volts(defaults, adjustable range 11.0-11.7volts) |
| Lead acid battery (bAt) | 14.4 volts | 13.7 Volts (defaults, adjustable range13-15V) | 10.7V (defaults, adjustable range9.0-11.0 Volts) | 11.6 Volts (defaults, adjustable range11.0-11.7V) |
Trouble Shooting
Every electronic appliance faces some problem that can be easily resolved with troubleshooting. The basic problem and its solution are mentioned under the troubleshooting column in the PWMM user manual. Here I have mentioned the problem – probable cause – solution.
- Charge icon not on when sunny – Solar panel is open or reversed – Reconnect
- Load icon off – Battery low – Recharge
- Load icon off – Mode setting wrong – Set again
- Load icon slow flashing – Overload – Reduce load watt
- Load icon slow flashing – Short circuit protection – Auto-reconnect
- Power off – Battery too low reverse – Check battery or connection
Solar Charge Controller 24V Settings
After the solar charge controller settings for a 12V system, the 24V system is the most common charge controller used in residential solar power systems. The basic settings for this are mentioned in the user manual of your charge controller. However, here are a few basic settings that are for a 24V system.
- Battery Floating Charging Voltage is 27.4V
- Battery Over-discharging Protection Voltage is 21.6V to 22.8V
- Battery Overcharging Protection Voltage is 28.2V to 29V
- Solar charge controller settings for AGM battery
The solar charge controller setting for an AGM or Absorbent Glass Mat battery is also for 12 volts, 24 volts, or 48 volts. The maximum charge current should be at 50A maximum per 100Ah battery capacity. The absorption voltage should be 14.60 volts and the float voltage at 13.50 volts. Equalization voltage at 14.40 volts and bulk voltage offset at 0.10 volts. Absorption duration should be adaptive, and duration should be between 6 hours to 30 minutes per 100Ah battery capacity. The current percentage for equalization is at 25% and its duration at 4 hours max.
Solar Charge Controller Settings for Lithium Batteries
Before you begin setting up your lithium batteries, remember that lithium batteries do not require temperature compensation. Also, if you are replacing lead batteries with lithium batteries and the settings are set at Equalized this needs to be changed. To change this, select, EQE (Master equalizer enable/disable) on the charge controller display. This can also be done by selecting OFF the dip switch in other controllers. Some common settings for a multi-stage charge profile need to be set to the following settings:
- Charge voltage – 14.4 volts (3.6 VPC)
- Absorption time – 30 minutes to balance lithium cells
- Float voltage – 13.6 volts
- Resting voltage (default) – 3.4 VPC
Solar Charge Controller Settings for Lead Acid Battery
The lead acid battery is a classic configuration in a solar power system. Once you convert the battery type from lithium/AGM to lead acid battery, the original set parameters for a lead acid battery will be used. These configurations are already installed in the charge controller system. And sometimes, it is just plugging and using the system.
Well, today you learned about the alteration in solar charge controller settings in accordance with the type of batteries your inverter has. Also, solar charge controller voltage settings should be carefully done to get the maximum potential output from the solar charge controller.
Olivia is committed to green energy and works to help ensure our planet’s long-term habitability. She takes part in environmental conservation by recycling and avoiding single-use plastic.
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2 Комментарии и мнения владельцев
Hello, very nice article! Could I have 2 questions: 1.) I have the same type controller. Do you know, why my solar controller is changing battery setup from B03 to B01 by itself? Is it damaged? 2.) Now I miss arrow on display between solar panel and battery. Does it mean, that battery is fully charged? Thank you.
Dear Jaro, Thankyou for reaching out to us. For Query 1: Solar Charge Controller changing battery setup from B03 to B01. We have found that said settings mean as follows: B03 – Battery Over Voltage – This error occurs when Input voltage to battery terminals exceeds 17.5-V B01 – Battery Disconnected – This fault code appears when the Portable solar kit cannot detect a battery bank. The issue you are facing can be due to the following reasons: 1- Automatic Configuration – Some controllers adjust their settings based on the battery type and conditions they detect. Check your controller’s manual to see if it has this feature and disable it, according to instrcutions listed in the manual. 2- Firmware or Software Issue: Glitches in the controller’s firmware or software can cause unexpected behavior. Check for firmware updates or try resetting the controller to its factory settings. If this doesnt work, contact the manufacturer to get the controller checked for damage and for possible repair. For Query 2: Arrow on Display between Solar Panel and Battery It is difficult to determine the exact meaning without knowing your controller’s model. 1- In some cases, the arrow indicates charging. 2- It could also mean the battery is fully charged. 3- Or, there might be an issue the controller requires a reset. Follow steps listed in the manual to do the same. And if the issue is still unresolved, there could be some issues with wiring between the 3 components. Last option is to get the entire system checked by an authorized technician and contact the manufacturer for assistance.
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Solar Panel Charge Controller Wiring Diagram Steps
Solar Panel Charge Controller Wiring Diagram and Step-by-Step Installation Guide for Off-Grid Solar Power System Wiring.
Connecting the solar panel charge controller (MPPT or PWM are the same), solar battery and PV array in the right way is the essential work before enjoying the solar energy.
Solar Power System Wiring Steps
Broadly, there are 5 steps for you to wiring the solar power system
- Connect the battery
- Connect the load
- Connect the PV array
- Check the connection
- Check the Power
Let’s Connect the solar energy system one by one.
Step 1: Connect the Battery
Note: Fire and explosion may occur if the positive and negative terminals of the battery are short-circuited.
Make sure the battery voltage is higher than 6V if system is 12V, then start the controller before connecting the battery to the solar system.
Make sure the battery voltage is not lower than 18V if the system is 24V.
When the controller is first started, the battery system voltage detection is an automatic process.
When installing the fuse, the maximum distance between the fuse and the positive battery terminal should be 150 mm. Before turning on the fuse, please confirm that the cable is connected correctly.
Step 2: Connect the load
The load terminal of the solar controller can be connected to a DC power source that has the same operating voltage as the rated voltage of the battery, and the controller will supply power to the load at the battery voltage.
Connect the load’s positive and negative terminals to the controller’s load terminals.
There may be voltage on the load side, be careful not to short circuit the load during connection.
A fuse should be connected to the positive or negative wire of the load. Do not connect the fuse during installation.
After installation, confirm that the fuse is properly connected.
Each load circuit has a separate fuse and all load currents cannot exceed the rated current of the controller when the load is connected through the panel.
Step 3: Connect the PV array
Connect the solar panel to the solar controller, which is available in 12V, 24V and 48V, noting that the rated voltage of the solar controller should be lower than the input voltage of the solar panel.
The solar module voltage in the system should not be lower than the system voltage.
Step 4: Check Connections
Check all connections again to see if the positive and negative terminals of each terminal are correct right. and the 6 terminal wiring should all be tightened.
Step 5: Confirm Power On
When the battery is supplying power to the controller, the controller will start up, the battery LED on the controller will then light up, check the status of the light and make sure that the light is normal.
Boost Solar Charge Controller wiring diagram this boost charge controller lets you charge a wide range of 36V-88V battery systems with 18V and 36V Panels. and contrary to the typical charge controller, this type of booster must connect conversely, connect the solar panel to the controller first. Multiple Solar Charge Controller wiring diagram In a large PV system, you may need to connect multiple solar controllers in parallel to charge the battery bank at the same time. Below is the wiring diagram for a parallel 60A 48V solar controller stacks.
Conclusion
Wiring sequence: first connect the battery, set the working mode of the load via solar charge controller, connect the solar panel, connect the load in the last, when disconnecting the solar power system, disconnect in the reverse order.
Quick Takeaways
This is the simple steps to wiring the whole solar system, broadly there are 5 steps for you to wire solar system.
Connect the solar battery
Always connect the solar battery first when hooking the solar power system.
Connect the load
connect the load to the solar charge controller load port
Connect the Solar Array
connect the solar array after the battery has been connected
Connect the inverter to solar battery
the inverter is only allowed to connect to the solar battery.
The 8 Best Solar Charge Controllers In 2023 Reviews and Buying Guide
If you are planning to install a solar panel system in either your home or office, you should also make sure that you are getting the right solar charge controller. As per the name, a solar charge controller is used to control and regulate the energy coming from the solar panels so that it can be stored in batteries. Since these are so important, we have provided you some of the Best Solar Charge Controllers in this article.
Before buying a Solar Charge Controller, make sure to consider the following factors:
- Maximum Current: With different solar charge controllers, you get a different current rating, which tells you about the maximum electrical load it can handle. While some solar charge controllers might support up to 20A of current, better models might support 40A of maximum current.
- Voltage Rating: There are primarily two types of solar charge controllers out there, including 12V ones and 24V ones. There are other voltage systems but these two are the majority. This is also true for the batteries that you will use to store electricity. Hence, make sure that your solar charge controller also supports both 12V and 24V Batteries for high versatility and compatibility.
- Warranty: Solar panels are considered to be highly reliable since they keep working for a very, very long time. Hence, you would also expect its companion accessories like a solar charge controller to last for a long time as well. Thankfully, most solar charge controllers come with a 1-year long warranty or longer.
Even though all of these factors are quite important when you are talking about solar charge controllers, there is still much more to learn. Hence, we have mentioned all of the details, like the features and options of the various solar charge controllers present here.
You can also find a detailed “Buying Guide” later on in this article to buy the perfect solar charge controller by following this article until the end.
Best Solar Charge Controllers In 2023
Best Solar Charge Controllers In 2023 Reviews
Renogy Solar Charge Controller
Even though there are many brands of solar charge controllers out there, Renogy is one of the most popular ones since it is able to offer various handy features at a low price tag.
The Renogy Wanderer Solar Charge Controller is the 1st product in this article and it is one of the cheapest options out there, which comes with a Bluetooth module. Thanks to its Bluetooth module, you can easily monitor your solar panel configuration. Although, its maximum current rating is quite low at just 10A.
Thankfully, this budget-oriented solar charge controller can still be a great option for many, as it supports both 12V and 24V solar systems (panels and batteries). A great thing about this solar charge controller is that it also has inbuilt USB ports for charging your mobile devices quite easily. Unfortunately, as it is a budget solar charge controller, you do not get any warranty with it.
- Offers a maximum current rating of 10A
- Works with both 12V and 24V solar panels
- Inbuilt 5V 2A USB ports
- Budget-friendly solar charge controller
- Comes with an inbuilt Bluetooth module
- Offers two USB ports for charging mobile devices
Victron Energy Solar Charge Controller
Despite being a premium brand of solar charge controllers, Victron Energy and its products can be a great option for many because of their high reliability while offering various features.
The Victron Energy SmartSolar MPPT Solar Charge Controller is the 2nd product in this article and it is the most reliable option present in this article. Not only that, but it also happens to offer Bluetooth connectivity just like the previous one. But unlike the previous one, this one also offers a very high maximum current rating of 30A.
This current rating is combined along with a voltage rating of 12V or 24V, which allows you to use this solar charge controller with virtually any solar panel. Coming to the best feature about this solar charge controller is that it offers an excellent build quality along with a 3-year long warranty, which is to be expected at its premium price tag.
- Offers a maximum current rating of 30A
- Works with both 12V and 24V solar panels
- Comes with a 3-year long warranty
- Highly reliable and durable solar charge controller
- Comes with an inbuilt Bluetooth module
- Offers a pretty high maximum current rating
Allpowers Solar Charger Controller
In case that you are on a budget, then you should consider going with the Allpowers solar charge controller as its products are known to offer various handy features to the user.
This Allpowers Solar Charge Controller is the 3rd product in this article and it is one of the cheapest options out there. Despite having a low price tag, it comes with an inbuilt display, which can be useful for checking info related to your solar panels. You also get a decent maximum current rating of 20A with this one.
To make sure that you can use this solar charge controller with almost any solar panel of your choice, Allpowers has support for both 12V and 24V systems. Even though this solar charge controller offers a pretty good warranty period of 1.5 years, its build quality is quite average, which might be an issue for some.
- Offers a maximum current rating of 20A
- Works with both 12V and 24V solar panels
- Comes with a 1.5-year long warranty
- Affordable solar charge controller
- Includes an inbuilt display
- Comes with a long warranty period
Depvko Solar Charger Controller
Those of you who are interested in getting a high-performance solar controller can consider Depvko and its products because they offer excellent performance and various features to the user.
This is our upgraded solar panel controller – the perfect solution for managing solar panels and batteries in 12V/24V solar systems. With a built-in industrial microcontroller, it automatically regulates the charging process and memorizes various parameters set by the user. It features dual USB outputs for charging mobile devices and is equipped with overcurrent, short-circuit, inverse connection, low voltage, and overcharge protection for safety.
The LCD display shows the status and data, and it’s suitable for use in various places like home, industrial, commercial, etc. Our controller comes with a 12-month warranty and lifetime technical support. It’s only suitable for lead-acid batteries and has 3-stage PWM charge management and dual MOSFET reverse current protection, which prolongs battery life and improves system efficiency. Upgrade to our new version today and enjoy worry-free solar power management.
- Built-in industrial microcontroller for automatic management of solar panels and batteries
- Dual USB outputs for charging mobile devices
- Overcurrent, short-circuit, inverse connection, low voltage, and overcharge protection for safety
- LCD display for status and data
- Suitable for use in various places
- 12-month warranty and lifetime technical support
- 3-stage PWM charge management and dual MOSFET reverse current protection for prolonging battery life and improving system efficiency
- Easy to use and suitable for small solar energy systems
- Safe to use with various protection features
- Automatic management with built-in microcontroller
- Prolongs battery life and improves system efficiency
Powmr Solar Charge Controller
Unlike the previous solar charge controller mentioned in this article, PowMr and its solar charge controller offering is quite different and is more viable for buyers on a budget.
While there might be many entry-level solar charge controllers in this article, the PowMr Solar Charge Controller is the cheapest option mentioned here. Even though it is an affordable option, it still comes with an inbuilt display that offers LED backlighting to the user. You also get a decent maximum current rating of 20A along with it.
Just like most other solar charge controllers mentioned in this article, this PowMr solar charge controller also supports both 12V and 24V solar panels. A great thing about this solar charge controller is that it has inbuilt USB ports for charging small mobile devices. You also get a 1-year long warranty with this budget solar charge controller. Unfortunately, its build quality is a bit on the cheapest side, which is to be expected at this price.
- Offers a maximum current rating of 20A
- Works with both 12V and 24V solar panels
- Comes with a 1-year long warranty
- Affordable price tag for a high value for money
- Supports a backlit inbuilt display
- Features two USB ports for charging mobile devices
Rich Solar Solar Charge Controller
At the last option in this article, we have Rich Solar, which is known to offer some of the best performing products, which also means that its solar charge controller can be a great pick if you want a high-performance model.
This Rich Solar Charge Controller is one of the best performing options in this article while not charging a premium for it. Although, unlike other high-performance models, this one does not come with any kind of remote monitoring. However, you do get an excellent maximum current rating of 40A.
As you would expect from a high-performance solar charge controller, it supports both 12V and 24V solar panels. To check any of its details, you have to use the display present on its front. Apart from being a high-performance model, it is also a highly reliable one thanks to its 2-year long warranty.
- Offers a maximum current rating of 40A
- Works with both 12V and 24V solar panels
- Comes with a 2-year long warranty
- Excellent performance rating with high current support
- Quite a reliable and durable solar charge controllers
- Works with most solar panel voltage ratings
Mohoo Solar Charge Controller
Mohoo and its products related to solar panel systems can be another great option for all those of you who are on a budget as its offerings are usually quite affordable, including its solar charge controller mentioned here.
The Mohoo Solar Charge Controller can be another great option if you are on a budget. Just like many other budget offerings, this one also comes with an inbuilt display. But unlike other budget offerings, this one has a very high maximum current rating of 30A, which makes it a high value for money pick.
You also get the support for both 12V as well as 24V systems so that it can be used in most cases. If you are not using that, you can use its inbuilt USB ports to power your mobile devices. Unfortunately, this budget solar charge controller lacks any kind of warranty, which can be an issue for many.
- Offers a maximum current rating of 30A
- Works with both 12V and 24V solar panels
- Includes an inbuilt display
- Come with a high current rating for the price
- Budget-friendly solar charge controller
- Offers inbuilt USB ports for charging mobile devices
EEEkit Solar Charge Controller
You can also consider EEEkit and its solar products if you happen to be in the market for a new solar charge controller that can offer decent performance at a low price tag.
It has 30A Solar Charge Controller with latest solar charge controller boasts a 30A rated discharge current, making it compatible with 12V or 24V systems and multiple lead-acid battery types. The dual USB 5V/3A output ports make it convenient for charging mobile devices.
The controller offers reliable protection against over-current, short-circuits, inverse connection, and low voltage. With an industrial microcontroller and functional LCD display, it provides intelligent management and easy monitoring. Installation and setup are made simple with a one-button operation and clear instructions.
We stand behind our product with a 30-day money-back guarantee and 12-month warranty for quality-related issues. Invest in our solar charge controller for efficient and trustworthy solar system management.
- 30A rated discharge current for compatibility with 12V or 24V systems and multiple lead-acid battery types
- Dual USB 5V/3A output ports for convenient mobile device charging
- Reliable protection against over-current, short-circuits, inverse connection, low voltage, and overcharge
- Industrial microcontroller and functional LCD display for intelligent management and easy monitoring
- One-button operation for simple installation and configuration adjustments
- 30-day money-back guarantee and 12-month warranty for quality-related issues
- Provides efficient and reliable solar system management
- Easy to install and use
- Offers multiple protection functions to prolong battery life
- Compatible with various lead-acid battery types and mobile devices
- Includes industrial microcontroller for automatic management and data memory
Buying Guide For The Best Solar Charge Controller
Solar panels can be a great way to get clean and green electricity for your homes and offices, which can reduce your carbon footprint by quite a lot. Solar panels can also help you in reducing your power bills by quite a lot. But before you can start using a solar panel, you also need other companion devices and accessories like a solar charge controller.
Thus, we have mentioned the best solar charge controllers earlier in this article. Even though we have mentioned all of their major features and options, some of you might still be confused. In that case, this solar charge controllers buying guide is just for you. It will take you through the following points so that you can buy the right one:
Maximum Current
If you want to know more about the performance of your solar charge controller and want to make sure that it can handle high load appliances, then you should check its maximum current rating.
As you would expect, it tells you about the maximum current your solar charge controller can handle. While basic models only support 10 or 20 amps of maximum current, better models can even handle 30 amps or even up to 40 amps of electricity without any issues.
Voltage Rating
While it does not affect the performance, the voltage rating of your solar charge controller is highly important to check. It is important to check to ensure that you are getting a versatile and compatible solar charge controller.
Different solar panels and battery setups out there use different current voltages. This primarily includes 12 volt and 24-volt solar panel setups that are not compatible with each other. Thankfully, all of the solar charge controllers mentioned in this article are compatible with both 12 volt and 24 volt systems making them highly versatile.
Warranty
A great thing about solar panels is that once you have installed them on the roof of your home or office, they can keep working for almost forever. This allows you to get a lot of green energy for completely free. Although this can only happen if the rest of the connecting devices made for your solar panel are also equally reliable.
In other words, make sure to check the warranty offered by your solar charge controller to make sure that it is a reliable one. While most of them offer a 1-year long warranty, better ones might even offer a 2 year long or even a 3-year long warranty in some cases for high reliability and longevity.
Conclusion
Those of you who already have one or are planning to get a solar panel system would know that there are a lot of devices that you have to pair with them before using it. This can include things like batteries, inverters, cables, and much more. But all of these cannot work together unless you also have a solar charge controller.
Because these are so important, we have mentioned the best solar charge controllers up above in this article. All of them have been mentioned, along with their major features and options. You can also find a detailed buying guide related to these solar charge controllers. And after going through all of these details, here are our favorite solar charge controller recommendations:
- Since solar panels are known to be highly reliable, the Victron Energy solar charge controller can be a great option since it is the most durable and reliable option in this article. Not only do you get a great build quality with it, but it also offers a 3-year long warranty. When combined with its high maximum current rating of 30A, you can expect great results from it.
- Speaking of the maximum current rating, if you are looking for a high-performance solar charge controller, you should go with the Rich solar charge controller. This one offers the highest maximum current rating of 40A, which is more than enough for most users. You also get a 2-year long warranty with it for your peace of mind.
- Those of you who are on a budget should consider the PowMr solar charge controller. Even though it is among the cheapest options present in this article, it still offers a 1-year long warranty. You also get a decent 20A maximum current rating with this solar charge controller. And just like more expensive options, this one also supports both 12V and 24V solar panel systems.
Make sure to share your thoughts in the Комментарии и мнения владельцев section. You can also post any questions down there if you have any!
What Is an RV Solar Charge Controller?
Today’s post is all about the RV solar charge controller. “The what?”, you may ask. This essential component of an RV’s solar power system is seldom the FOCUS when people talk about solar. Solar panels and battery banks seem to get top billing. But the solar charge controller is a critical element of any RV solar system, and today we’ll tell you why.
Harnessing the awesome power of the sun for your electrical needs is an amazing privilege. Because we live and run businesses from our RV full-time… mostly while boondocking off the grid… our power needs are considerable. So we went all out in building our solar array and electrical system. But some RVers only need a portable solar panel and a battery or solar generator to top off their electronics. Others need a little more than that to power their RV and a few small appliances.
Regardless of the size of your solar array and your battery bank, all you’ve gotta do is connect a solar panel to a battery and you’ve got power, right? Not so fast! Today’s post focuses on what’s missing in that scenario – the RV solar charge controller.
Let’s talk about what it is, what it does, how it works, and why you absolutely need it. If you’re thinking of powering your rig (or anything that requires power) with solar, then this information is critical to your plan.
- 1) What Is an RV Solar Charge Controller?
- 2) What Does an RV Solar Charge Controller Do?
- 3) What Is a PWM Charge Controller?
- 4) What Is an MPPT Charge Controller?
- 5) Which Type of Charge Controller is Better – PWM or MPPT?
- 6) What Are Amp Ratings on a Solar Charge Controller?
- 7) What Amp Rating Do I Need For My RV’s Solar Charge Controller?
- 8) Can I Connect a Solar Panel to My RV Battery Without a Charge Controller?
- 9) Can I Use My Batteries While They’re Being Charged With Solar?
- 10) What to Look For When Choosing an RV Solar Charge Controller
- 10.1) Quality
- 10.2) Remote Monitoring Ability
- 10.3) Adjustable Voltage Setpoints
- 10.4) On/Off Switch
- 10.5) Ability to Easily Switch from Shore Power to Dry Camp Mode
- 11.1) Victron Energy SmartSolar MPPT 100V/50 amp 12/24-Volt Solar Charge Controller (Bluetooth)
- 11.2) Renogy 30A Adventurer 12V/24V PWM Solar Charge Controller with LCD Display Flush Mount Design Negative Ground, Compatible with Sealed, Gel, Flooded, and Lithium Batteries
- 11.3) Xantrex 710-3024-01 Solar Charge Controller, MPPT, 30A
- 11.4) Renogy Wanderer Li 30A 12V PWM Negative Ground Solar Charge Controller Solar Panel Regulator w/ Temp Sensor Function Fit for Lithium, Sealed, Gel, and Flooded Batteries
- 11.5) Victron Energy SmartSolar MPPT 75V 15 amp 12/24-Volt Solar Charge Controller (Bluetooth)
What Is an RV Solar Charge Controller?
With any solar power system, your energy source is the sun, and the component that harnesses that energy is your solar panel (or array of solar panels). Your battery bank is where the energy coming from your solar panels is stored.
Between the two – solar panel(s) and battery bank – you need a voltage regulator. Without it, your batteries could be damaged by excessive voltage and overcharging, and your solar panels won’t output their maximum power.
An RV solar charge controller is that voltage regulator. The rate of charge and the volume of energy going into your battery bank are regulated by your solar charge controller. Typically, it can be configured to provide the proper charging profile for your battery’s chemistry — typically flooded lead-acid, AGM (absorbed glass mat), or lithium. It’s an absolutely essential component of your RV’s solar system.
A solar charge controller sits between your solar panel(s) and your battery bank. It acts as a voltage regulator to prevent overcharging and stops the current from flowing back into the solar panels.
What Does an RV Solar Charge Controller Do?
In addition to protecting your battery bank from excessive voltage and overcharging, a solar charge controller stops the energy that’s stored in your batteries from flowing back out into the solar panel when the sun goes down.
So, it regulates the energy going into the battery bank, and it prevents the stored energy current from flowing in the other direction, (back to the solar panels), when darkness falls.
Your RV solar charge controller is the smallest, lightest component of your solar power system, but no less essential than solar panels and batteries.
What Is a PWM Charge Controller?
There are two types of solar charge controllers – PWM and MPPT. PWM stands for “Pulse Width Modulation.” In order to charge your battery bank, a PWM charge controller uses a series of short pulses (as opposed to a steady stream) of power.
A PWM charge controller is constantly checking the status of your batteries and uses that information to determine the timing and the size of the energy pulses it sends.
So, if your battery bank is significantly discharged, a PWM charge controller would send out long pulses of energy to your batteries continuously. But, if your battery bank was fully charged and there was no load on the system (i.e. you weren’t running anything requiring power), the PWM charge controller would send out only a very tiny pulse every few seconds.
As your battery bank becomes fully charged, a PWM solar charge controller will reduce the volume of power coming into the battery accordingly. Once your battery bank is fully charged, it will send out only a tiny trickle charge to keep your battery bank full. (This is often referred to as float charging.)
There are two types of solar charge controllers – MPPT (Maximum Power Point Tracking) and PWM (Pulse Width Modulation).
What Is an MPPT Charge Controller?
MPPT stands for “Maximum Power Point Tracking”. An MPPT solar charge controller takes the high-voltage power output supplied by a solar panel and converts it to a lower, more acceptable voltage so that your battery bank charges safely and without damage, and your devices and appliances are charged efficiently.
So, an MPPT solar charge controller is an electronic DC-to-DC converter that takes the high-voltage DC output from your solar panel and converts it to the lower voltage required to charge your battery bank.
In addition, “maximum power point tracking” means that an MPPT solar charge controller is constantly analyzing your solar panels and determining the exact voltage required to maximize the panels’ power output to your batteries. This changes constantly depending on the amount of light going into the panels, the ambient temperature, and other variable factors.
This is why MPPT charge controllers allow more efficient solar panel performance (by up to 30%) than PWM charge controllers. They allow the panels to operate at their optimal (higher) voltage for the conditions… and convert that extra voltage into additional charging amps.
Which Type of Charge Controller is Better – PWM or MPPT?
The answer to this question depends largely on your needs.
If you have low power needs and thus a low-power solar system, then a PWM solar charge controller would be a less expensive option and perfectly suitable. This would require that you have solar panels equalling no more than around 150 Watts and your power needs aren’t significant.
A PWM charge controller is also best for trickle-charging a battery for maintenance when it’s not being used.
Perhaps the greatest feature of a PWM charge controller is its very low voltage loss, which means that if your devices and appliances are turned off, your battery power is not being consumed.
But if your solar system is greater than 150 Watts and you have high power needs and multiple solar panels as we do, an MPPT solar charge controller is what you need.
If your RV’s solar system is greater than 150W, then you’ll want an MPPT controller. A PWM controller may be sufficient for smaller systems.
First, MPPT controllers allow for multiple solar panels to be wired together in series (increasing the voltage output), creating a very significant solar array. They also give us greater control with a large solar system and can utilize the maximum output from our solar panels (which a PWM charge controller would not be able to do). For anyone with a larger solar system, MPPT solar charge controllers provide up to 30% more efficient than PWM controllers.
So, while MPPT solar charge controllers are more expensive, they’re also more efficient in an application like ours, and thus the greater cost balances out with the greater efficiency.
Depending on the degree of sunlight and ambient temps, a PWM charge controller may produce anywhere from 65% to 85% efficiency (they’re actually best in sunny, warm climates) while an MPPT controller will provide maximum efficiency coming from a generous solar array, even in climates where ambient temperatures are cool.
To summarize this PWM vs MPPT discussion, if you’ve got a 100-150 Watt solar panel you’re using to keep your RV’s house battery topped off and you generally travel in fairly warm, sunny climates, a PWM solar charge controller may be perfectly sufficient for you, and they’re a simpler (fewer parts) and less costly option.
But, if you’re looking to supply more than around 150 Watts from your solar panels to your battery bank, or if you’re looking to connect multiple solar panels in series, you’ll want an MPPT controller to do the job.
What Are Amp Ratings on a Solar Charge Controller?
An amp is a unit of electrical current, and all solar charge controllers have a maximum amp rating. The current/amp rating is the maximum charging current that the solar charge controller can output to the attached battery bank.
However, the power rating for solar panels is stated in Watts and is determined by both the output current and the output voltage (for most RVs, the battery charging voltage will be either 12V or 24V).
An equation to bear in mind when trying to determine the appropriate amp rating for your RV’s solar charge controller is amps x volts = watts (and its corollary equation of amps = watts ÷ volts).
So, for example, a 30-amp (30A) charge controller with a 12V output will be able to handle up to 360 Watts (30A x 12V).
That same charge controller (30A) charging a battery bank with a 24V output will be capable of charging up to 720 Watts (30A x 24V).
Our Xantrex inverter-charger control panel.
What Amp Rating Do I Need For My RV’s Solar Charge Controller?
The general rule of thumb used in determining the appropriate amp rating for an RV solar charge controller is to select a solar charge controller with an amp rating that is 25% higher than the total peak power amperage of your solar array.
The reason for the additional 25% is that in certain conditions your solar panels may produce more than their rated output. Having room for 25% additional charging capacity will accommodate those conditions.
Remember that the amp rating is the maximum charging current (or maximum amperage output) to the batteries. Remember also that amps x watts = volts. This allows you to calculate the charging current of your solar panels in amps by using the equation watts ÷ volts = amps.
You can obtain the maximum rated power of a solar panel in watts by reading the back of the panel (or the spec sheet or manual that comes with the panel). You’ll also see the maximum power voltage expressed in volts.
You’ll want to calculate the current that will be produced by your solar panel whenever it’s generating its maximum power. You can calculate the current in amps by dividing watts by volts.
Now let’s say, for example, you have two 100 Watt solar panels with a peak power of 6 amps each. Wired in parallel with each other, 6 amps x 2 panels means that your two solar panels will produce 12 total amps. In this case, you’ll want a solar charge controller rated for 25% more, so you’d want a minimum of a 15A controller.
(Note that in this particular scenario, buying a 20A charge controller would allow you to add another solar panel in the future, should you desire to do so.)
To make this easier, many solar panel kits come with the appropriate solar charge controller as determined by the manufacturer.
Can I Connect a Solar Panel to My RV Battery Without a Charge Controller?
If you want to use a solar system to power your RV, you will absolutely need a charge controller. Without it, you’re very likely to damage your battery bank due to the overcharging that’s likely to occur because the panels alone are not capable of limiting or regulating the voltage going into your batteries.
It should be noted that in theory, you can connect a very small solar panel (no more than 5 Watts) directly to a battery for the purpose of trickle charging the battery for maintenance purposes while in storage.
Every RV solar system needs a solar charge controller. The only time you might be able to get away without a charge controller is when using a tiny solar panel to trickle charge a battery.
Can I Use My Batteries While They’re Being Charged With Solar?
You certainly can use your batteries while they’re being charged with your RV solar system.
You can use the power/electricity in your RV (taken from your battery bank) while the sun continues to send more energy to your solar panels, and your panels (through the solar charge controller!) continue to charge your battery bank.
What to Look For When Choosing an RV Solar Charge Controller
There are a number of features to look for when choosing an RV solar charge controller. We’ll take a look at those features, in brief, followed by five excellent choices of solar charge controllers on the market today.
Quality
The first thing you want to consider when shopping for an RV solar charge controller is quality. You want a charge controller made by a manufacturer recognized in the industry as a provider of quality solar components, with a good historical reputation for both product and customer service, and a warranty to back up the product.
Poorly made solar charge controllers can create electrical noise that interferes with the electronic frequencies of devices in your rig.
Be certain to only buy a charge controller that is UL-certified. UL (Underwriters Laboratory) is an independent non-profit organization that tests electrical components equipment for potential hazards. UL-certified solar charge controllers have been tested by UL and have met their requirements for safety.
Remote Monitoring Ability
The ability to monitor your system remotely is a feature that can be very important. Some solar charge controllers come with a Bluetooth feature that will allow you to download an app that gives you the ability to monitor the system from your smartphone, from as much as 30 feet away.
Many RV solar charge controllers offer remote monitoring via Bluetooth through the manufacturer’s smartphone app.
This means that you can be sitting in the comfort of your RV, or even outside your RV, and you’ll be able to actually see the current flowing through your controller to your battery bank, check the voltage regulation, and take a look at how much power your solar panels are generating.
Some charge controllers provide a monitor panel to be installed in your RV so that you can check the activity of the controller from there. Some monitors allow you to log in remotely to check on the functioning of your system.
Adjustable Voltage Setpoints
Adjustable voltage setpoints allow you to adjust the charging voltage to align with the type of battery/batteries you have, whether they’re lead-acid, AGM, gel, or lithium-ion batteries. In some controllers, you simply select the appropriate battery type and it has the correct charging parameters pre-programmed. Other controllers may allow you to manually configure custom charging voltages for each charging stage. Either works.
On/Off Switch
An on-off switch is extremely handy to have because it allows you to turn off the charge controller anytime you want to stop charging your batteries.
Without this feature, you’ll need to remove the fuse of the battery bank anytime you want to turn off your RV solar charge controller, or wire in your own on/off switch.
Ability to Easily Switch from Shore Power to Dry Camp Mode
This is an interesting feature that allows you to change the set point of the battery charge based on how you’re camping. If you’re boondocking, you’ll want to be charging to maximum capacity. But when you’re connected to shore power you can switch to standby mode. You can also use stand-by mode to help maintain your batteries when your rig is in storage.
What Are Some of the Best RV Solar Charge Controllers?
Let’s take a look at five excellent RV solar charge controllers in several budget ranges, and the features they offer.
Victron Energy SmartSolar MPPT 100V/50 amp 12/24-Volt Solar Charge Controller (Bluetooth)
The Victron Energy SmartSolar MPPT charge controllers are among the most popular RV solar charge controllers on the market. This particular model is a 100-volt, 50-amp charge controller for 12V and 24V battery banks, making it acceptable for up to 700 Watts of solar panels at 12V, or 1400 Watts of solar at 24V.
The SmartSolar feature allows your batteries to be charged to full capacity very quickly. (The manufacturer states that it can operate with a battery voltage as low as 0 volts, meaning that it could recharge a deeply discharged battery as long as the cells aren’t permanently sulfated or damaged in some other way.)
This charge controller has an internal sensor that gauges the ambient temperature and compensates accordingly.
It has built-in Bluetooth allowing you to configure and monitor the charge controller through the VictronConnect app on your smartphone or tablet.
Reviews for this Victron SmartSolar MPPT controller are stellar.
- Are you ready to take your solar energy game to the next level? Using a multi-stage, adaptive charging algorithm, the Victron Energy SmartSolar MPPT.
- With the latest and fastest technology, this charge controller maximizes energy-harvest from your solar panels, intelligently driving it to achieve.
Renogy 30A Adventurer 12V/24V PWM Solar Charge Controller with LCD Display Flush Mount Design Negative Ground, Compatible with Sealed, Gel, Flooded, and Lithium Batteries
The Renogy 30A Adventurer automatically detects whether your system is a 12V or 24V DC system, and offers Smart 4-stage PWM charging while protecting against overcharging, reverse current, reverse polarity, and short-circuiting.
This unit flush mounts on your RV’s wall, and the easy-to-read LCD screen displays solar charging and battery operation information and more, offering customizable parameters.
This is a negative ground controller with adaptability for AGM, gel, flooded, and lithium-ion batteries.
- 【12V/24V Automatically Detect】Automatically detects 12V or 24V DC system voltages (for non-lithium batteries). The LCD screen and multiple LED.
- 【Smart 4-Stage PWM Charging】Smart 4-Stage PWM charging (Bulk, Boost, Float, and Equalization) increases battery life and improves system.
Xantrex 710-3024-01 Solar Charge Controller, MPPT, 30A
The Xantrex 710-3024-01 MPPT 30A solar charge controller offers an industry-leading 98% charging efficiency as well as dual-battery bank charging that allows you to simultaneously charge and maintain your house batteries and your rig’s starter battery.
A leader in the solar industry, Xantrex offers best-in-class protection for your batteries. This solar charge controller supports house batteries that are AGM, gel, flooded, or lithium-ion phosphate (LiFePO4).
- Advanced Maximum Power Point Tracking (MPPT) technology increasing daily energy harvest by 20-30% compared to PWM technology
- Dual-battery bank charging to simultaneously charge house and starter batteries
Renogy Wanderer Li 30A 12V PWM Negative Ground Solar Charge Controller Solar Panel Regulator w/ Temp Sensor Function Fit for Lithium, Sealed, Gel, and Flooded Batteries
Renogy’s Wanderer automatically detects your 12V or 24V DC system voltage and offers Smart 4-stage PWM charging (Bulk, Boost, Float, and Equalization). Like the Adventurer, it offers intelligent protection against overcharging, reverse current, reverse polarity, and short-circuiting.
Its simple interface is easy to use and offers multiple LED indicators of charge status and battery information.
The Wanderer is adaptable to AGM, gel, flooded, and lithium-ion batteries.
- 【Optimized for 12V Batteries】Compatible with 12V battery banks on the market, including lithium batteries. The LED indicators allow you to set.
- 【Smart 4-Stage PWM Charging】Smart 4-Stage PWM charging (Bulk, Boost, Float, and Equalization) increases battery life and improves system.
Victron Energy SmartSolar MPPT 75V 15 amp 12/24-Volt Solar Charge Controller (Bluetooth)
Victron’s SmartSolar MPPT 75V, 15A solar charge controller is another feature-rich Victron product that’s very similar to the Victron SmartSolar charge controller noted above, though this product is a 75-volt, 15-amp charge controller.
This charge controller also has built-in Bluetooth for remote configuration and monitoring via the VictronConnect app on a smartphone or tablet.
Victron uses a sophisticated 3-stage charging method that includes a float charge. This charge controller comes highly recommended by a full 93% of 4-and 5-star Amazon reviewers.
- SmartSolar MPPT 75-Volt 15 amp: A solar charger gathers energy from your solar panels, and stores it in your batteries, Using the latest, fastest.
- The Victron Energy SmartSolar charge controller will even recharge a severely depleted battery. It can operate with a battery voltage as low as 0.
Do I Need a Solar Charge Controller for My RV?
If you intend to harness the power of the sun using solar panels to store energy in your RV’s battery bank, then yes, you will need an RV solar charge controller that is consistent with your system.
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