Skip to content
Solar Charge Controller Settings. Solar regulator controller

Solar Charge Controller Settings. Solar regulator controller

    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

    solar, charge, controller, settings

    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:

    solar, charge, controller, settings
    • 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.
    solar, charge, controller, settings

    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.

    Do Garmin Watches Cause Cancer?

    Powering Up: Your Guide to Charging a Solar Watch

    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.

    Leave A Reply Cancel Reply

    We are dedicated to providing informative and insightful articles on energy, with a FOCUS on renewable, green energy, solar, sustainable, and environment-related topics. Our team of experienced writers and researchers are passionate about exploring the latest advancements in clean energy and providing our readers with valuable information to help them make informed decisions about their energy consumption.

    Corporate Park, D-21, Sector 21, Dwarka, Delhi 110077

    Recent Posts

    Solar Charge Controllers; everything you need to know

    Solar panels have come in leaps and bounds over the last two decades, and in the camping and 4WDing world its completely changed the way people travel and enjoy themselves. A good solar panel and battery setup will allow you to run anything from fridges through to lights, water pumps and even inverters running normal 240V appliances like you would at home.

    In todays post, we are looking at what a solar charge controller is, what you need to know about them and what your options are. Please know this is all referring to 12V applications, and not inverters for household use! To clear up any confusion, these are often referred to as Solar Regulators as well; its the same thing; it controls, or regulates the charge to your battery.

    What is a solar charge controller?

    In the camping and 4WD world, almost all batteries are 12V. This means they need to be charged at a rate that is around 12 – 14.5 volts, depending on the battery type. No solar panels output at this rate, and so you need a solar panel regulator to convert the higher voltage into something suitable for your battery.

    Why do you need one?

    You need a solar charge controller to charge your batteries. Without one, you’ll fry your batteries in no time. It would be similar to putting petrol in a diesel motor; its not something you can be flexible with.

    What options are there for solar charge controllers?

    There’s a lot of different types of solar regulators that you can purchase and use, and they will vary in price and ability dramatically. You can buy a cheap PWM regulator for 30, or a high end battery management system and DCDC for upwards of 800.

    The choice is yours, and you don’t need to spend huge money, but getting something that suits what you need is important.

    PWM

    The cheapest solar regulator is going to be a PWM, or pulse width modulation charger. These just step the power down in the most simple way, and are a great, economical way to charge your batteries.

    MPPT

    The next step up is MPPT, or maximum power point tracking, which is a bit smarter in the way it converts the power, and you’ll generally see better results. It’s hugely important to know that a lot of solar regulators you purchase on eBay are labelled as MPPT, and are actually not.

    Much like many of the solar panels are incorrectly advertised, you need to be very careful. Keen to know more? Check this out – eBay solar panels.

    A lot of people end up with an MPPT solar regulator, as they do a great job. These are stand alone solar regulators.

    DCDC with solar input

    If you have the ability to charge your batteries from your vehicle as well, a lot of people are going down the DCDC charger route, with a solar input. These will take alternator power and charge your batteries, or they will take power from your solar panels and charge the batteries that way.

    Its important to ensure that your DCDC will tolerate the voltage from your panels, as some are higher voltage and will damage the charger. Not everyone needs a DCDC though, and if you are considering one, have a read of this; What is a DCDC and do you need one?

    Factory solar regulators stuck onto the panel

    You’ll see a lot of cheaper solar panels that come with regulators will have them stuck onto the back of the panel. We have a Rich Solar folding panel that we carry around like this, and its done a decent job over the years. However, its not a good idea to have the regulator stuck onto the back of the panel for a number of reasons.

    Cables suffer voltage drop, and you really want your solar regulator as close to the batteries being charged as possible. If its a long way away (like when its stuck to the solar panel), you’ll find that by the time the current gets to your battery its lost some of its strength.

    Electrical components should be kept cool and out of the weather as much as possible, and if you’ve ever put your hand on a solar panel in the middle of the day you’d know that they are anything but cool and out of the weather!

    Ideally, you run the unregulated cables to a nicer environment near your batteries, and let them do the charging from there. That said, if it works, it works and you don’t have to change anything.

    Panel sizes and wattage

    Solar panels come in a huge range of sizes and wattages. You can get the normal 12V panels (18V input), or they can be 36V (like what you have on the roof of your home). Your solar panel size should suit your setup, and ensure your batteries stay healthy. importantly, the voltage needs to match your solar charger, as a huge number of solar controllers will not take higher wattage panels.

    One of the most common ways to set up a cheap solar system is to use old house solar panels that you can literally pick up for under 30 each, and feed them into a solar controller that will take the higher voltage and convert it down to charge a 12V panel.

    MC4 vs Andersons

    A large majority of panels purchased today come with MC4 connectors. These are a black, round, plastic fitting that works pretty well (although many are fakes). The alternative is to use Anderson plugs, which are very well known and work well. MC4 connections should be waterproof, whereas Andersons can get wet and remain unaffected.

    Anderson plugs are probably easier to work with, but both do the job just fine. It is worth knowing that if you cut your MC4 connectors off you can probably say good bye to any warranty that you have, and that it is possible to get MC4 to Anderson plug adapters.

    Parallel or series

    If you have more than one solar panel, you’ll have to decide how to link them up. The most common way is in parallel, resulting in 18V coming from the panels, but double the wattage.

    For example, you could have two 100 watt solar panels, and you’d get 200W coming in at 18V. If you wire them up in series, you’d get 100W at 36V.

    How you wire them up depends on your exact system and the solar controller that you are running, but you are best off sticking with Parallel unless you have reason to change. There are some pro’s and con’s to each, but parallel is far more common.

    Cable sizing

    Like anything electrical, you need to ensure that the cable length and size is suitable for your setup. If you have a significant solar system, you’ll need decent thickness cables to ensure there is limited voltage drop and to ensure that you don’t start a fire with the cables getting too hot.

    There’s a number of voltage drop calculators around, where you can put the amperage going through them and the cable run length, and get the correct cable size for the job. Don’t undersize it; its just not worth it.

    Battery type

    Most solar regulators are set up to charge your standard lead acid battery, and are not able to correctly charge lithium. If you have a lithium battery, you need to ensure that the solar charger has a lithium charging profile, as its got different voltages than your normal lead acid.

    Yes, you can use a traditional lead acid charger to charge a lithium; its not going to blow it up if the voltages are not too high but its inefficient, and not the right way to go about it. Drop in lithium batteries are a bit misleading in this way. to come on that on another post.

    The regulator voltage needs to suit the charger

    When designing a system, you should ensure that everything is compatible. What I mean by this, is that the solar panel voltages vary, and not all chargers will take all voltages. For example, house panels, and even some high wattage panels designed for 12V will not work through a number of regulators.

    A lot of chargers will not take a current of over 28V, and there’s plenty of panels that exceed this, so check carefully before you commit to any parts.

    Using two solar regulators

    I often see people asking whether they can more than one solar regulator into their batteries. For example, if you had a 100W panel with a regulator on it, can you connect that to a battery that is also receiving charge from a DCDC via solar, or a different regulator?

    The answer is yes, you absolutely can, and you won’t do any damage. How it behaves will be determined by the regulators, and they can reduce the overall efficiency when working with each other, but they will both put charge into your system.

    We’ve done this many times, and our Reconn R2 is actually wired up with an Enerdrive DCDC being fed by alternator power from our 4WD and a 120W panel on the roof, and then 600W of panels feeding a Renogy Solar controller. They both feed our 340aH of lithium batteries and we have no issues with them.

    Of course, you can read more about this here – can you run two controllers into the same battery?

    What have we missed? What else do you want to know about solar charge controllers?

    VOTRONIC. Innovative Elektronik Made in Germany

    All devices execution A and B have special charging programs for classic lead-acid batteries (also gel or AGM) as well as modern Lithium-LiFePO4 batteries (only MPP). Please note, that c harging of modern Lithium batteries with devices which are used for ordinary batteries in lead-acid-technology (incl. Gel or AGM) will cause probably, that the advantages of this new technology (capacity, number or cycles etc.) is not fully usable. For optimal charging of Lithium-LiFePO4 batteries, we recommend the use of a charge regulator in MPP technology.

    MPP Technology (Maximum-Power-Point)Optimum energy yield due to charging current being increased by 10% to 30%!

    Execution A Dimensions: 131 x 77 x 40 mm (incl. mounting flanges, without connections )

    Execution B Dimensions: 131 x 77 x 40 mm (incl. mounting flanges, without connections )

    All devices execution A and B have special charging programs for classic lead-acid batteries (also gel or AGM) as well as modern Lithium-LiFePO4 batteries (only MPP). Please note, that c harging of modern Lithium batteries with devices which are used for ordinary batteries in lead-acid-technology (incl. Gel or AGM) will cause probably, that the advantages of this new technology (capacity, number or cycles etc.) is not fully usable. For optimal charging of Lithium-LiFePO4 batteries, we recommend the use of a charge regulator in MPP technology.

    Device with humidity-proof electronic system. Article-No. 11626

    For Solar Modules with:

    max. 550 Wp Module Capacity

    Charging Options:

    1 Supply- and 1 Starter Battery

    Description

    Please notice, that the device is only suitablte for solar panels up to the maximum power (Wp) and below the maximum persmissable voltage (Voc). In addition the controller is not suitable for an input-side connection (/- solar panels) of wind, water, fuel or motor generators, power supplies, batteries or other current sources.

    For campers, caravans and boats. The solar controller is a special development for use in campers and caravans, and it is suitable for all types and makes of lead batteries (also for acid, GEL/dryfit and AGM/fleece batteries). Optimum charging is ensured by an intelligent microprocessor control with characteristic lines IU1oU2. Working fully automatically and maintenance-free, the solar controller offers the following functions:

    • Charging port board battery I: Charging programs No. 1, 2 and 4 (gel, AGM and acid batteries) adjustable to the battery typ.
    • Charging Port Starter Battery II: Separate auxiliary charging port with reduced charging current (12 V (0.8 A or 1.5 A) for support charging and trickle charging of the vehicle’s starter battery with overcharge protection in case of extended stop periods.
    • The charging voltage being free from peaks is controlled in such a way, that any overcharging of the batteries is excluded.
    • Two Battery Charging Ports: Automatic charging of the main battery or board battery (Board I): Support charging and trickle charging of the vehicle’s starter battery (Start II) with overcharge protection.
    • Unattended Charging: Standard protection against back discharge of battery (in case of insufficient solar power (such as at twilight, at night etc.) and against overload and overheating.
    • Floating Operation: Observation of the characteristic lines of charging, even with simultaneous operation of consumers being connected to the battery.
    • Overcharge protection: Reduction of the charging current of the battery in case of excessive solar power and full battery. Immediate recharging in case of power consumption to ensure always the best possible charging state of the battery.
    • Characteristic Line of Charging IU1oU2: A defined charging boost (U1) avoids harmful acid accumulation and provides compensation charge to the individual battery cells. After that, automatic trickle charging (U2).
    • On-board Mains Suppression Filter: Integrated on-board mains suppression filter ensures unproblematic parallel operation of the controller with other charging sources, wind- and petrol-driven generators, mains supply chargers, dynamos etc. at one battery.
    • Connection for Temperature Sensor: Automatic adaptation of the charging voltage to the battery temperature. In case of low outside temperatures, full charging of the weaker battery is improved, and in case of summery temperatures unnecessary battery gassing will be avoided.This is highly recommended, if the battery is exposed to strong variations in temperature, such as in the motor compartment.
    • Charging Cable Compensation: Automatic compensation of voltage losses on the charging cables.
    • Measurement Output for EBL (Electroblock of the Vehicle): Allows convenient application of the (solar) current display being installed in the electroblock for supervision of the solar system.Please check in advance the compatibility of your Schaudt Electrobloc (EBL) and the corresponding control panel, because we are not able to give any warrenty for this.
    • Terminal „AES“ (only SR 350 CI and SR 550 CI): Automatic commutation of ELECTROLUX / DOMETIC refrigerators with “AES” (Automatic Energy Selector) from gas operation to 12 V operation in case of excess solar power.
    • Ready for connection of the VOTRONIC Solar Display LCD-Solar Computer S for optimum control of the system.

    Technical Details

    Nominal Operating Voltage (AC) in [V] 12
    Capacity Solar Module max. [Wp] 550
    Current Solar Moddule max. [A] 35.0
    Voltage Solar Module max. [V] 28
    Charging Current Batt. I / II max. [A] 35.0 / 1.5
    Characteristic Line of Charging IU1oU2
    Battery Type adjustable Acid/Lead-Acid, Gel. AGM
    Current Consumption Stand-by in [A] 0.004
    Overcharge Protection yes
    Reverse Current Protection (during the night) yes
    On-board mains suppression filter yes
    Number of Charging Ports 2
    Protection against Overload, Overtemperature, Short-circuit yes
    Connection for Temperatur-Sensor yes
    Compensation of voltage loss on charging cables yes
    Connection for LCD-Solar-Computer S yes
    Signal Output EBL for Display Solar Charging Current Battery yes
    Temperature Range [°C] -20 to 45
    Dimensions in [mm]. Dimensions incl. mounting flanges, without connections 131 x 77 x 40
    Weight in [g] 170
    Mark of conformity (CE)
    Ambient Conditions, Humidity of Air: max. 95 % RH, No Condensation
    Delivery Scope: Operating Manual

    Accessories

    LCD-Solar-Computer S(Art. 1250)

    Temperature Sensor 825(Art. 2001)

    The Solar Data Extender combines the data from up to three solar controllers so that they can be shown on a single display. The usual LCD displays (e.g. LCD solar computer S or VPC combination panel) can still be used. It is compatible with the following devices:

    • Solar Charging Controllers in SR- und MPP-Technology (from Serial-No. 14Vxx.xxxxx)
    • Battery Charger Series VBCS Triple
    • LCD-Solar-Computer S (from Serial-No. 15V40.xxxxx)
    • VPC Combi Panel with Solar Function
    • Bluetooth Connector S-BC

    Solar Data Extender 3n1(Art. 1440)

    Standard version:Solar Charging Controller SR 550 Duo Dig. (Art. 11626)

    Device with humidity-proof electronic system. Article-No. 11621

    For Solar Modules with:

    max. 350 Wp Module Capacity

    Charging Options:

    1 Supply- and 1 Starter Battery

    Description

    Please notice, that the device is only suitablte for solar panels up to the maximum power (Wp) and below the maximum persmissable voltage (Voc). In addition the controller is not suitable for an input-side connection (/- solar panels) of wind, water, fuel or motor generators, power supplies, batteries or other current sources.

    For campers, caravans and boats. The solar controller is a special development for use in campers and caravans, and it is suitable for all types and makes of lead batteries (also for acid, GEL/dryfit and AGM/fleece batteries). Optimum charging is ensured by an intelligent microprocessor control with characteristic lines IU1oU2. Working fully automatically and maintenance-free, the solar controller offers the following functions:

    • Charging port board battery I: Charging programs No. 1, 2 and 4 (gel, AGM and acid batteries) adjustable to the battery typ.
    • Charging Port Starter Battery II: Separate auxiliary charging port with reduced charging current (12 V (0.8 A or 1.5 A) for support charging and trickle charging of the vehicle’s starter battery with overcharge protection in case of extended stop periods.
    • The charging voltage being free from peaks is controlled in such a way, that any overcharging of the batteries is excluded.
    • Two Battery Charging Ports: Automatic charging of the main battery or board battery (Board I): Support charging and trickle charging of the vehicle’s starter battery (Start II) with overcharge protection.
    • Unattended Charging: Standard protection against back discharge of battery (in case of insufficient solar power (such as at twilight, at night etc.) and against overload and overheating.
    • Floating Operation: Observation of the characteristic lines of charging, even with simultaneous operation of consumers being connected to the battery.
    • Overcharge protection: Reduction of the charging current of the battery in case of excessive solar power and full battery. Immediate recharging in case of power consumption to ensure always the best possible charging state of the battery.
    • Characteristic Line of Charging IU1oU2: A defined charging boost (U1) avoids harmful acid accumulation and provides compensation charge to the individual battery cells. After that, automatic trickle charging (U2).
    • On-board Mains Suppression Filter: Integrated on-board mains suppression filter ensures unproblematic parallel operation of the controller with other charging sources, wind- and petrol-driven generators, mains supply chargers, dynamos etc. at one battery.
    • Connection for Temperature Sensor: Automatic adaptation of the charging voltage to the battery temperature. In case of low outside temperatures, full charging of the weaker battery is improved, and in case of summery temperatures unnecessary battery gassing will be avoided.This is highly recommended, if the battery is exposed to strong variations in temperature, such as in the motor compartment.
    • Charging Cable Compensation: Automatic compensation of voltage losses on the charging cables.
    • Measurement Output for EBL (Electroblock of the Vehicle): Allows convenient application of the (solar) current display being installed in the electroblock for supervision of the solar system.Please check in advance the compatibility of your Schaudt Electrobloc (EBL) and the corresponding control panel, because we are not able to give any warrenty for this.
    • Terminal „AES“ (only SR 350 CI and SR 550 CI): Automatic commutation of ELECTROLUX / DOMETIC refrigerators with “AES” (Automatic Energy Selector) from gas operation to 12 V operation in case of excess solar power.
    • Ready for connection of the VOTRONIC Solar Display LCD-Solar Computer S for optimum control of the system.

    Technical Details

    Nominal Operating Voltage (AC) in [V] 12
    Capacity Solar Module max. [Wp] 350
    Current Solar Moddule max. [A] 22.0
    Voltage Solar Module max. [V] 28
    Charging Current Batt. I / II max. [A] 22.0 / 1.5
    Characteristic Line of Charging IU1oU2
    Battery Type adjustable Acid/Lead-Acid, Gel. AGM
    Current Consumption Stand-by in [A] 0.004
    Overcharge Protection yes
    Reverse Current Protection (during the night) yes
    On-board mains suppression filter yes
    Number of Charging Ports 2
    Protection against Overload, Overtemperature, Short-circuit yes
    Connection for Temperature Sensor yes
    Compensation of voltage loss on charging cables yes
    Connection for LCD-Solar-Computer S yes
    Signal Output EBL for Display Solar Charging Current Battery yes
    Temperature Range [°C] -20 to 45
    Dimensions in [mm]. Dimensions incl. mounting flanges, without connections 131 x 77 x 40
    Weight in [g] 165
    Mark of conformity (CE)
    Ambient Conditions, Humidity of Air: max. 95 % RH, No Condensation
    Delivery Scope: Operating Manual

    What Is Solar Charge Controller? Do You Need One?

    Depending on the kind of solarstorage system you have, you may or may not need one.

    David Kuchta, Ph.D. has 10 years of experience in gardening and has read widely in environmental history and the energy transition. An environmental activist since the 1970s, he is also a historian, author, gardener, and educator.

    • Share
    • Email

    A solar charge controller benefits a solarstorage system. The solarstorage system allows customers to use solar off-grid, either full-time or as a backup during power outages. The controller controls the amount of energy being sent into the battery backup so that the battery doesn’t exceed its voltage capacity—thereby extending the life of the battery and avoiding any damage to it.

    Depending on the kind of solarstorage system you have, you may or may not need a solar charge controller. In this article, we’ll go through everything you need to know about this tool.

    Benefits and Types

    The output of a solar panel can vary depending on levels of sunlight, ambient temperature, the quality of the solar cells in the panel, and other factors. All of these factors affect the efficiency of the panels in converting sunlight into electricity.

    A solar charge controller smooths out that variability so that batteries receive power at a constant and safe rate. It also sends a “trickle charge” when the battery is nearly full. Since batteries regularly lose a small amount of charge, a trickle charge keeps the battery topped off without overcharging it.

    If you have a grid-tied solarstorage system, either ground-mounted or on your roof, you most likely have no need for a solar charge controller. Your excess solar energy will automatically flow into the grid when your battery is full. But if your solar system is operating off-grid, a controller might be a wise investment.

    There are two main types of solar charge controllers, Pulse Width Modulated (PWM) and Maximum Power Point Tracking (MPPT). PWM controllers are better suited for small solarstorage systems with low voltage panels and small batteries. MPPT controllers are more expensive, but have more features and advantages; they are recommended for any solar system over 170 watts.

    PWM Controllers

    The main function of a PWM controller is to protect your battery by making sure solar panels have the same voltage as the battery. The voltage of the battery must match the “nominal voltage” of a solar panel—that is, the voltage the panel is marketed as having, even if the actual voltage can vary and often be slightly higher.

    As its name suggests, a PWM controller controls the flow by pulsing the power sent to the battery to slow down or speed up the charging. Some PWM controllers can only handle one voltage level, while others can handle different levels. Either way, the voltage of both battery and panel must still be the same.

    PWM controllers are uncomplicated devices, though some can have additional features added to their essentially basic systems.

    MPPT Controllers

    Unlike PWM systems, where the voltage of battery and panels must be the same, MPPT controllers can charge a lower voltage battery from a higher voltage solar array and, in some cases, a higher voltage battery from a lower voltage solar array.

    solar, charge, controller, settings

    In electrical systems, voltage and amperage are inversely related: The higher the voltage, the lower the current (amperage), and vice versa. Since an MPPT controller controls the rate and current of the voltage flowing from solar panels to a battery, off-grid solarstorage systems can have panels of different voltage than their batteries.

    So while a solar panel by itself with a nominal voltage of 24 volts is insufficient to power a 48-volt battery, an MPPT controller allows it to work by halving the amperage, thereby doubling the voltage flowing into the battery.

    Treehugger Tip

    For fans of golfing or boondocking (off-grid RV living), an MPPT controller allows you to charge a 36-volt or 48-volt battery with a single flexible 12-volt solar panel attached to the roof of your RV or golf cart.

    MPPT controllers can increase the efficiency of your solar panels by 20% to 30% by tracking the optimal voltage-to-current ratio to maximize output to a battery. It’s their increased efficiency that can make their higher cost worth it.

    Costs

    The simplest PWM controllers can cost as little as 20. Those with additional features can cost up to 200 or more.

    MPPT controllers can do more, but cost more, running from 50 to over 1,000, depending on the features. If there is a long distance between your panels and battery, however, you can save money by using lower-gauge electrical wiring between the two, since MPPT controllers modulate current and voltage.

    And because MPPT controllers can convert the higher output of a solar array to the lower voltage of a battery, a battery can capture more of the sun’s energy. This will increase its efficiency and potentially shorten the payback time of the more expensive system, as well as increase your ability to rely solely on solar energy.

    Some optional controller features that come at additional costs include:

    • LEDs to allow users to monitor the voltage and amperage of the system.
    • Internet-enabled controllers to allow for remote monitoring.
    • Multiple outputs to allow for charging two separate batteries.
    • Longer cables for greater distances between panels and battery.
    • Temperature sensors, which will maximize the efficiency of charging since batteries charge at different rates during different temperatures.
    • Low voltage disconnects, which will automatically disconnect an attached DC-operated device (such as a golf cart) when the battery is low.

    As always with solar products, anticipate your solar needs and capabilities, and calculate the costs and payback time to see what kind of system works best for you.

    Leave a Reply

    Your email address will not be published. Required fields are marked *