BougeRV Li 20A PWM Solar Charge Controller 12V 24V, Solar Panel Regulator w/Backlit Display, USB Port, Adjustable Parameter, for Lithium, AGM, SLD, Gel Battery, for RV, Off-Gird, Negative Ground
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Availability:
In Stock.
Arrives
Tuesday, Jul 14
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Style: 20A
Features
- EASY-READ BACKLIT DISPLAY: To check the PV status and the Battery status easily, the 20A solar panel regulator will cycle the PV input current and the battery voltage on the main interface with real-time value every 3 seconds. Larger size screen and 50% brightness in no operation, the solar charge controller is easy to read in dim light. Allows you to see exactly what the controller was doing and how much power is being drawn in from the panel(s).
- Li COMPATIBILITY: Not only compatible with traditional battery, the PWM controller also has clear and special icons for various Lithium batteries on the LCD screen, such as LFP for LiFePO4, Li for Ternary lithium battery, LTO for Lithium-Titanium-Oxide. With setting to Li battery type, this solar charge controller also has a function to jumpstart your lithium battery in case it gets overly discharged. Don't need to buy a new controller for the upgraded Lithium-ion batteries.
- BATTERY COMPATIBILITY AND MAINTENANCE: Compatible with various 12v or 24v batteries, such as SLD, FLD, GEL, AGM, SLA, LiFePO4, ternary lithium battery and LTO battery. Including the ability to program the solar charge controller for best charging and maintenance of various battery types. The solar panel regulator is dependable to be your battery maintainer.
- SOLAR PANEL REGULATOR: Max PV input voltage 55 volts, this solar panel regulator can handle 300 watts input for 12 volts battery system, 600 watts input for 24 volts system.
- NEAT AND SAFE WIRING: Come with 3 pairs of spade terminals, it is easy to grip the wires more firmly and make a neat wiring. Please note that turn the screwdriver counterclockwise first, in order to open up the wire clamp holes. hook up the battery first, positive wire, then negative wire. After that, connect the controller to the solar panel, please note that do not disconnect the battery when the solar panels are active.
- Reminder: This product sold before 9/27 does not have the function of connecting to the APP. The new version purchased after 9/27 has the function of connecting to the APP.
Color: Black
Brand: BougeRV
Voltage: 24 Volts
Material: ABS Plastic
Display Type: LCD
Brand Name: BougeRV
Warranty Description: Manufacturer warranty for 18 months from date of purchase.
Manufacturer: BougeRV
Part Number: ISE135B
Model: 20A PWM Negative
Included Components: Controller
Unit Count: 1.0 Count
Item Type Name: Controller
Voltage: 24 Volts
Display Type: LCD
Smart Home Compatibility: Not Smart Home Compatible
Color: Black
Material Type: ABS Plastic
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Tuesday, Jul 14
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Similar Products
Top Amazon Reviews
Style: 20A
I bought this BougeRV Li 20A PWM Solar Charge Controller for my 12V setup with three 100W panels in parallel, and it's doing the job reliably. It auto-detects 12V or 24V systems automatically (I only run 12V, so that was plug-and-play). No problems handling 300W in full sun—no clipping or getting hot. The backlit display is easy to read and shows PV current, battery voltage, and charging status clearly. It has Bluetooth connectivity with the app for monitoring and control from your phone, which is a nice bonus. There's one USB-A port (2A output) that's handy for charging a phone or small gadget, and the lithium settings work great with my LiFePO4 battery—the recovery feature helps if it gets too low. It doesn't have a load output, but I doubt most people use that anyway. Anyone who knows anything about solar will tell you that MPPT is better than PWM, and that's true. But not every project needs the higher-priced tech. PWM just needs a clear sky and it does the job. Setup was simple, protections seem good, and it's been solid so far. I have several BougeRV products now, and I think they compete well with higher-end items. Good bang for the buck for a basic 12V solar setup.
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Reviewed in the United States on March 14, 2026 by D. Adams
Style: 20A
I've had 3 different solar charge controllers and this one is by far the best made quality. It works exactly as described and the manual is easy to understand. Very sturdy construction. I think I'm going to replace all of the other controllers I have with these. Update: I bought another one of these to go into a portable battery case and it failed during testing. I contacted BougeRV about it, they sent over some troubleshooting steps and when it was deemed defective they replaced it. Stuff breaks, but how the manufacture deals with it is important. Full marks for how this was handled. Once again I recommend these devices and the company.
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Reviewed in the United States on March 9, 2023 by Gene Head
Style: 20A
I returned the first unit because the first 1/3 of the screen did not work. I liked the simplicity of the unit and it charged my LiFePo battery just fine. Second one arrived today, Before removing any of the plastic screen protector I plugged the unit into the battery and again, the first 1/3 of the screen is dead. I had seen a previous review with the same complaint and hoped it was just a fluke, but apparently the quality control missed a batch. Going to return and exchange yet again, I hope that the third try is the winner. I will update my review after that. Update - third unit worked perfect out of the box. Customer support was very helpful in resolving the issue. Great controller for the price.
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Reviewed in the United States on October 18, 2022 by J Lindberg
Style: 20A
Seems to work okay enough to charge my LiFePO RV battery (12V, 100Ahr). Supposed to cut out at a max V of 14.6, but often keeps charging at 15+V, which is not ideal but makes me also question my BMS. Display is nearly impossible to read if not mounted directly at one’s eye level. Seems to have no contrast if not seen directly head-on. This is regardless of using the backlight, or not. The wire mounting lugs are so tiny (PH1) and recessed in tiny holes (< 0.25”) that it’s difficult to use a normal screwdriver. Since most panel and battery wires (for an RV system) are 10AWG or larger, the lugs are insufficient to secure such wires. They seem more appropriate for a max 2A setup than a 20A setup. Low price, but just beware of some capacity concerns.
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Reviewed in the United States on April 10, 2025 by Calcutrex
Style: 20A
Me encanta porque además de que funciona muy bien cuando la batería se descarga y el sol energiza los paneles solares el automáticamente enciende y comienza a cargar, no como otros controladores que necesitan energía de la batería para que trabajen y hay que hacer puente para activarlos o conectarles energía, estos son automáticos los recomiendo al cien!
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Reviewed in the United States on June 8, 2026 by Osman
Style: 20A
Arrived quick and packaged well. Unit worked great but one of the backlight LEDs didn't work so the display was kind of dark. Contact of the company and they made quick work of getting another one out to me. Also checked back several times after the fact to make sure I was satisfied. Very satisfied. In fact I also ordered one of their mppt controllers for another application I have and it worked great. Will definitely use them again.
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Reviewed in the United States on November 24, 2023 by Kindle Customer
Style: 20A
trying to save money sometimes does not work... this 20amp pwm by bougerv failed in 2 months with daily use this was hooked on a single 150watt solar panel..it was working at first for daily use but then suddenly stopped accepting amps unable to send it back per amazon...trying to see if I can get a refund save a couple more dollars and get a mppt charge controller
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Reviewed in the United States on February 28, 2023 by Jp
Style: 20A
No issues so far, screen can be hard to see, the Bluetooth gives a better picture.
Reviewed in the United States on April 24, 2026 Reviewed in the United States on April 24, 2026 by Kirt Bowman