Solar Panel Kit 20W 12V Monocrystalline,Battery Maintainer +10A Solar Charge Controller + Extension Cable with Battery Clips O-Ring Terminal for RV Marine Boat Off Grid System

This solar controller with solar panel works amazing it helps me out of a tough situation when my power went out and to help cut down on my electric bill in the lighting in my bedroom.This solar controller helped keep my battery is fully charged and maintained while regulating the electricity to my electronics!The insulation is very easy just need a small Phillips head screwdriver a spot to mount it and a battery connect to the ease of installation is as easy as 1 2 3This amount that controller on the wall mount your solar panel outside in a nice sunny w area and the rest will do its job!

The media could not be loaded. During my initial testing outside I couldn't get any output on the "load" connection. However, I must have been doing something wrong because today everything is working fine. I got a normal voltage and current output on both USB ports, a good charge voltage for the battery and over 10 volts/ 6 amps on the load. It should work fine on my e-bike for supplemental USB power and maintaining a12v battery for other peripherals.

Works well keeps my battery happy

Installed it on my trailer for lights and gps with a 15ah lifepo4 battery. Keeps it at perfect voltage and hasn't had an issue at all, it's driven around Phoenix often. Pretty good set up if you don't have huge daily power use

Estubo muy bueno

I put a battery in the rear of my van to operate the wheelchair equipment, which happen to draw a small amount of power when not being used, so I needed a way to keep the battery up when not being used. I mount magnets to the panel in the holes provided, place it on the roof or side of the van, inside the door when not in use, the others never let me down.

The following is in my opinion based on my past experience only:I am having problems getting it to keep my settings and so I am just glad the lifepo4 has controller for protecting the lifepo4 🤔The USB work only when the Sun is shining and when the sun is not shining only provide less than 5 volts each. Further if u use the 2 USB ports the unit becomes hot to the touch while another Amazon 2 USB to battery terminals stays normal and no heat created while connected to 2 USB outdoor cameras. Further it's nice to see the battery voltage displayed the unit.Update Aug 1 2024🫤In my opinion based on my past experience only I am confirming the unit doesn't heat up if the 2 attached USB ports r not used, so I guess these ports r for temporary use during the daytime. Further on the issue of manual setting the numbers for voltage as an example; going from 28 volts toward 13.9 volts; ar 26 volts the next number is 29 volts.It appears this unit is for lifepo4 batteries connected is my guess only.

The product description does not mention anywhere that this controller does not work with any form of Li battery, including LiFePO.The controller itself is confusing to use, and the instructions are flat-out wrong. The "timer" has no logic to how it works, as far as I can tell, and I'm the kind of guy who generally figures stuff out.As far as I can tell, the solar panel works nicely.Summary: if I could return just the controller, I would do so in a heartbeat. The price with the panel makes it not worth the time/headache to return the whole set, though. I suppose if you are using a lead-acid battery, you'd be fine except for setting up the controller.