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January 7, 2022 Jason Svarc
Best mid-range MPPT solar charge controllers up to 40A
In this article, we review six of the most popular, mid-level MPPT solar charge controllers commonly used for small scale solar power systems up to 2kW. These are more affordable, lower voltage (100-150V) units, which are generally designed for 12V or 24V battery systems, although several can be used on 48V batteries. A number of these charge controllers also feature inbuilt load control terminals for basic DC lighting and other loads.
In this review, we don’t list simple PWM controllers used for DC lighting and basic systems since there are many sites already covering these entry-level PWM controllers. For high-performance MPPT solar charge controllers with higher input voltages up to 300V and current ratings from 60A to 100A, see our high-power MPPT solar charge controllers review.
What is a solar charge controller?
A solar charge controller, also known as a solar regulator, is a battery charge regulator connected between the solar array and battery. Its job is to regulate the solar output to ensure the battery is charged correctly and not overcharged. DC coupled solar charge controllers been around for decades and are used in most small scale off-grid solar power systems.
Top 6 Solar Charge Controllers
Mid-level solar controllers up to 40A
Smaller capacity MPPT solar charge controllers with a current rating from 20A to 40A are used for many different applications including off-grid cabins and homes, RV’s, boats, caravans, telecommunications and remote site backup. These mid-range MPPT solar charge controllers are available from many different manufacturers, but this review will FOCUS on the most popular and best quality charge controllers from the most reputable manufacturers which have been on the market for several years.
| 1 | Victron SmartSolar MPPT | 35 A | 150V | 12V 24V 36V 48V | 350 to 480 | |
| 2 | EPever TRIRON Series | 40 A | 150V | 12V 24V | 150 to 250 | |
| 3 | Morningstar ProStar MPPT | 40 A | 120V | 12V 24V | 460 to 540 | |
| 4 | EPever XTRA Series | 40 A | 150V | 12V 24V 36V 48V | 130 to 190 | |
| 5 | Renogy Rover | 40 A | 100V | 12V 24V | 150 to 190 | |
| 6 | EPever BN Series | 40 A | 150V | 12V 24V | 170 to 250 |
Comparison Criteria
In this review, we rank the various charge controllers according to a number of important criteria including build quality, MPPT tracking speed, battery voltage range, operating temperature range (heat dissipation), monitoring, real-world performance and price. In our reviews, we generally rank performance and quality over affordability, so in this case, we rate the unit price lower than other criteria. This may come across as bias towards the more expensive models, but based on real-world results, testing and performance monitoring, the higher-end controllers have proven to out-perform the cheaper models.
Read more about selecting and correct sizing a solar charge controller in the MPPT solar charge controllers explained article.
Victron SmartSolar
Victron Energy is considered a world leader in power electronics and specialise in manufacturing equipment required for off-grid and stand-alone power systems including, inverters, batteries, chargers, monitors and of course, solar charge controllers. Based in the Netherlands, Victron manufacture many products in India and have become well known for producing quality, reliable off-grid battery inverter/chargers and a wide range of quality MPPT solar charge controllers.
Victron offer a huge range of solar charge controllers, from small 10A PWM models, to high-performance 100A MPPT varieties with high voltage inputs up to 250V. The MPPT 150V models appear very simple in design, and may not have a display or load control terminals like many others, however, where Victron out performs the competition is in MPPT tracking performance, communications and monitoring.
Victron have by far the most advanced system monitoring with inbuilt Bluetooth connection offering easy programming and configuration, plus remote firmware updates which add extra features and options. The display-less design may not please all users, but the fast, accurate MPPT tracking, high build quality, and V.E. Smart networking options are stand-out features.
Smartsolar MPPT 150V 35A
- Fast MPP Tracking
- 150V max Voc
- 12V, 24V or 48V batteries
- Compatible with LiFePO4 Lithium batteries
- Very advanced monitoring app
- Wide operating temperature up to 60°C
- Inbuilt temp sensor
- Optional wireless battery sensor
- Easy remote firmware updates
- 5 Year warranty
See the detailed Victron Energy Review
EPever TRIRON Series
EPever was founded in 2007 and has grown rapidly to become one of the largest Chinese manufacturers of cost-effective power products including a wide range of MPPT solar charge controllers. The Triron series is the next evolution to the well-known Tracer series of MPPT’s.
The TRIRON series from EPever is a much more advanced and user-friendly version of the original AN series of charge controllers. The TRIRON controllers have a unique swappable display module as well as a swappable interface module with an RS485 communication option that can be used for a number of different applications. Note, maximum PV voltage is either 100V or 150V depending on the model. The 5 button display module is very easy to use and provide all the important information you need about the PV, battery and load. Wireless access is available via the eBox-BLE Bluetooth adapter or the Wi-Fi adapter is available for remote monitoring.
TRIRON Series MPPT 150V 40A
- Fast MPP Tracking
- 150V max Voltage Voc (TRIRON 3215N 4215N)
- Easy to use with a large clear display
- Compatible with Lead-acid and Lithium batteries
- 40A Load control
- Swappable display and interface modules
- RS485 Interface for communications and remote control
- USB Port and relay control options
- Optional Temp sensor
Morningstar Prostar MPPT
Morningstar are a well-established company based in the US with 25 years of experience in engineering and manufacturing high-performance solar charge controllers. Morningstar is widely recognized as developing some of the best quality products on the market with high levels of protection against extreme environments, lightning surges and high operating temperatures.
The Prostar range of MPPT charge controllers are available in 25A and 40A versions with a 120V input voltage limit. The extremely fast MPP tracking can perform a full voltage sweep in less than 1 second using the Trakstar technology. The device features good size terminals protected under a front cover, including load control output terminals rated up to 30A, plus a clear backlit LCD display and can easily programmed using the 4 large buttons. However, the very high price tag means the Prostar MPPT series is out of reach for many users.
Prostar MPPT 120V 40A
- Very fast MPP Tracking
- 120V max Voc
- Compatible with LiFePO4 Lithium batteries
- Wide operating temp up to 60°C
- 30A Load control
- High surge protection
- Optional Battery sensor
- 5 Year warranty
EPever XTRA Series
EPever, also known as EPsolar, was founded in 2007 in Beijing, China and has grown rapidly to become one of the largest manufacturers of cost-effective solar power products including a wide range of MPPT charge controllers. The XTRA series of MPPT’s released in early 2018, have only recently become more popular due to the low cost, easy setup, and lithium battery compatibility.
The XTRA series is available in 10 different options with 3 display types, current ratings from 10 to 40A, battery voltages from 12V to 48V, and input voltage limit up to 150V. In comparison to the older AN series which had a 100V input limit, the XTRA series features lithium battery compatibility and a higher input 150V voltage (Voc) on the 30 and 40A models, plus a modern look and concealed screw terminals. Note, the two-button version with LCD is basically the older AN series controller in a modern package.
XTRA Series MPPT 40A
- Good MPP Tracking
- Three display options with a clear simple LCD
- Compatible with most Lithium LiFePO4 batteries
- 40A Load control
- Optional MT50 display
- Optional Temp sensor
- Optional Wi-Fi and Bluetooth module
- Low cost
5. Renogy Rover
Renogy, founded in the US in 2014, recently became a very popular choice for solar enthusiasts across the world due to the low-cost, easy setup and good MPPT tracking. Renogy manufacture a wide range of affordable inverters, DC converters and solar charge controllers in China.
The Rover series from Renogy is a feature packed MPPT controller with a clear inbuilt display, plus a low-cost (optional) Bluetooth adapter which provides a great, easy to use interface with many configuration options. Load control terminals are built-in, although the output is limited to 20A. The overall build quality is quite good, however there are some area’s which could be improved, most notably the cable terminals which are far too small for a 40A controller.
Rover MPPT 100V 40A
- Good MPP Tracking
- Clear Simple display
- Compatible with Lithium (12.8V LiFePO4)
- 20A Load control
- Advanced Bluetooth app and user settings
- Temp sensor included
- Low cost
6. Outback BN series by EPever
The Outback Power Flexmax40 is made by EPever and is commonly known as the Tracer BN series which is a well known affordable MPPT controller.
EPever one of the leading manufacturers of cost-effective power products including a wide range of solar charge controllers. The well-known Tracer and TRIRON series of MPPT’s are a very popular choice for solar enthusiasts across the world due to the easy setup, good MPPT tracking, and low cost.
The first generation AN series is the best-known MPPT in the range, being a low-cost 100V unit with an inbuilt display. However, the BN series is the more expensive higher-performance version with many extra features including a 150V input voltage limit, heavy-duty robust design, large heatsink, and huge input terminals which can accept a cable size up to 50mm2 (1 AWG).
The obvious feature lacking from the BN series is the display. However, monitoring and configuration is available via the additional remote MT50 display which features a good clear LCD screen showing all the basic information required. Wireless access is also available via the eBox-BLE Bluetooth adapter.
Tracer BN Series MPPT 150V 40A
- Very large screw terminals
- Large heatsink and wide operating temperature range
- 12V, 24V batteries
- 150V max Voc
- Wide MPP voltage range
- 20A Load control
- Remote MT50 display with settings and load control
- Optional Temp sensor
Description
The Renogy 40A Rover MPPT Charge Controller is the most efficient type of charge controller. With up to 99% tracking efficiency, the Rover ensures maximum power point solar charging that gets more energy to your battery bank. Capable of automatically detecting 12V/24V lead acid battery systems, this crucial component is preset to also work with Gel, Flooded (wet cell), and Sealed batteries（manual setting is required for 24V Lithium battery）. When paired with the Renogy BT-1 Module and DC Home app you can view system performance in real-time and make parameter changes without having to get up!
Key Features
Die-cast aluminium design ensuring excellent heat dissipation and Renogy Maximum Power Point Tracking technology with a high tracking efficiency of up to 99% and peak conversion efficiency of 98%. It is the best charging solution even in cloudy environments where the max power point of the solar panels will fluctuate all day.
Automatically detects 12V or 24V DC system voltages (for Non-Lithium battery types), and the LCD screen and multiple LED indicators display the solar charging and battery operation information, customizable parameters, and error codes
Meant to safeguard your system, the self-diagnostic capability can assess and protect against reverse polarity, battery overcharging, battery over-discharging, overload, short-circuiting, and reverse current.
Features 4-stage charging (Bulk, Absorption, Float, and Equalization) of Lead Acid Batteries and 2-stage charging (Bulk and Absorption) for Lithium batteries as well as Lithium Reactivation
Connect DC appliances directly to the optional Load Terminals and monitor consumption or set up timer controls directly from the controller
RS232 communication port allows the Renogy Rover to communicate with the Renogy BT-1 Bluetooth module (NOT included in the package, highly recommend to add-on ) that will enable you to monitor the status and productivity of your panels through the Renogy DC Home App.
Package Includes
Rover Li 40 Amp MPPT Charge Controller
Remote Temperature Sensor
Options: BT-1 Bluetooth Module
Specification
| Nominal Voltage: | 12/24V Auto Recognition |
| Rated Charge Current: | 40 A |
| Max. PV Input Power: | 12V/520W, 24V/1040W |
| Max. PV Input Voltage: | 100 VDC |
| Self-Consumption: | 100mA/12V; 58mA/24V |
| Equalization Voltage: | Sealed:14.6V; Flooded: 14.8V; Gel: N/A; Lithium(LFP): N/A |
| Float Voltage: | Sealed:13.8V; Flooded: 13.8V; Gel: 13.8V; Lithium(LFP): N/A |
| Boost Voltage: | Sealed: 14.4V; Flooded: 14.6V; Gel: 14.2V ; Lithium(LFP): 14.4V |
| Operating Temperature: | -35°C to 45°C;.31°F to 113°F |
| Temperature Compensation: | -3mV/°C/2V |
| Dimensions: | 238 x 172 x 77 mm; 9.38 x 6.78 x 3.05 in |
| Weight: | 4.4 lbs / 2.0 kg |
| Enclosure: | IP32 |
| Terminals: | Up to 8 AWG |
| Remote Temperature Sensor Cable Length | 3m |
| Communication Protocol: RS232 | Port Type: RJ12 |
| Input Voltage: 12V | Protection Grade: IP54 |
| Standby Power Consumption: 0.04W | Operating Power Consumption: 0.05W |
| Communication Range: ≤82ft | Serial Baud Rate: Fixed Baud Rate 9600bps |
| Cable Length: 5.00 m (16.4 ft) | Dimensions: 2.65 X 1.38 X 0.55 in (67.3 X 35 X 14 mm) |
| Operation Temperature:.20℃~85℃（-4°F to 185°F） | Weight: 130g (4.58oz) |
| Certifications： | |
| CE | |
| FCC Class B Part 15 Compliant |
Rover 60 Amp MPPT Solar Charge Controller
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【How to Choose The Right Controller for You】 You can read this article: Solar Charge Controller Sizing And How To Choose One So that you can better choose the right controller for you
【Work With RENOGY ONE】 Add Renogy ONE M1 to achieve Smart energy monitoring with intuitive visuals and real-time data. This all-in-one display provides you access to accurate energy system data anywhere, anytime via the DC Home app.
Description
Renogy 60A Rover MPPT Charge Controller is an intelligent negative ground controller. Built with protections against reverse polarity, short-circuiting, overheating, and more, this MPPT controller can self-diagnose itself in the event of an error. Its durable shell protects against general wear and tear, and aluminum heat sink allows for heat dissipation. The Rover 60A can automatically detect 12V/24V/36V/48V systems (for non-lithium batteries) and can handle various battery options such as GEL and Lithium. Pair this charge controller with the Renogy BT-1/BT-2 Bluetooth module and DC Home app to view your system’s performance in real time and make parameter changes straight from your Smart device.
If you have any questions regarding this product, please call us at 1 (909) 287-7111 or contact us
Key Features
- ETL Listed to UL1741 and CSA C22.2.
- Automatically detects 12V/24V/36V/48V DC system voltages (for non-lithium batteries).
- Deep Cycle Sealed, Gel, Flooded, and Lithium battery option ready.
- Innovative MPPT technology with high tracking efficiency up to 99% and peak conversion efficiency of 98%.
- Electronic protection against reverse polarity, overcharging, over-discharging, overload, short-circuiting, and reverse current.
- LCD screen and multiple LED indicators for displaying system operation information, customizable parameters, and error codes.
- Features diverse load control; also capable of charging over-discharged lithium batteries.
- Integrated with an RS232 port and RS485 port, Renogy 60A Rover MPPT Charge Controller can work with a BT-1 or a BT-2 Bluetooth module to deliver real-time energy data across the DC Home Smart phone app Renogy ONE M1
Package Includes
Rover 60 Amp MPPT Solar Charge Controller
Remote Temperature Sensor
Mounting Brackets
| Nominal Voltage: 12V/24V/36V/48V Auto Recognition (for non-lithium batteries) | Rated Charge Current: 60A |
| Rated Load Current: 20A | Max. PV Input Power: 800W/12V; 1600W/24V; 2400W/36V; 3200W/48V |
| Max. PV Input Voltage: 150 VDC (25°C), 140VDC (-25°C) | Self-Consumption: 0.7W-1.2W |
| Operating Temperature:.31 °F to 113 °F (-35 °C to 45 °C ) | Temperature Compensation:.3mV/°C/2V (default) |
| Dimensions: 285 x 205 x 102mm (11.22 x 8.07 x 4.00in) | Weight: 7.9lbs |
| Enclosure: IP32 | Terminals: 25mm2 4AWG |
| Certification: CE / ROHS | |
| Compatible bluetooth: Renogy BT-1 Bluetooth module |