Solar Panel Kit 30W 12V Monocrystalline,Battery Maintainer +10A Solar Charge Controller + Extension Cable with Battery Clips O-Ring Terminal for RV Marine Boat Off Grid System

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

Good quality panel that didn't crack going through a hail storm. The direction for setting up are vague and I am not sure how the other ports are used on the change controller

Works well keeps my battery happy

Complete system for small project I am using it in a storage shed for lighting and even going to put a small converter on it

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.

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.

Using p=i/r, you should theoretically get about 1.6 amps out of the charger side, but at best I get .53 amps with .48 amps being the average being out to the battery, so about a 70% efficiency loss from the cell to the output, but overall if you're not in a hurry, it still does decent for a low output set up. Cells give 20 volts, good ouput, I think the loss is mostly in the controller. I've had it read 30 volts one time for some reason but disconnected and covered the cells, it reset back to 14.4. I also use an inverter to 1 amp charging while an engine is running, so not sure how well it'll do just on its own as it's 50/50 cells and inverter charger, but I get .5-.6 volts back in a 330 AH setup so puts back what I use daily. I run laptops, a cell phone and some other small charging requirements so not a heavy use application, though trying to run a small heater or something I'll need more output from cells if they were the only recharging supply