POWOXIUpgraded-20W-Solar-Battery-Charger-Maintainer, External Smart 3-Stages PWM Charge Controller, 12V Solar Panel Trickle Charging Kit for Car, Marine, Motorcycle, RV, etc

Was exactly what I was hoping for, does a great job of maintaining the battery.

There's not much to say about this. I put it in the sun. Connected to a battery with a 12.2 volt charge. Came back a few hours later and it was much higher. Easy to use.This is what I am going to use to keep my boat batteries charged. No need to keep them plugged into the house.

Installed on vehicle that has a slow draw, after a few hours in a moderate light (winter) location It did increase the voltage and total charge of the battery, please note this battery was not depleted (before and after pics), I am dubious about the claimed 8amp charge rate given the size of the panel, but it does genuinely work. It would likely work much better in summer and given full sunlight location. Unfortunately we found the power draw so havnt had an opportunity/need to leave it on the vehicle since testing.

This is my second Powoxi charger. I use them to keep marine batteries charged to start my boat and run a second battery for the stereo system in the boat. The first one has kept the boat starting battery charged all summer and I expect the new unit to do at least as well.

Because it is a dependable and effective source of solar power, the 10W Solar Battery Trickle Charger has proved to be the ideal traveling companion for me during the course of my adventures. The solar panels had a solid build due to the use of high-quality materials in their construction, and they were able to survive a wide range of climatic conditions. Due to the fact that I am a frequent traveler and thus often find myself in environments with varying weather conditions, the fact that this solar charger is waterproof was a major selling factor for me. On the road, I am no longer nervous about getting wet from unexpected rain showers or splashes. Because of the detailed instructions that were supplied, putting up the solar panels was an absolute snap. The upgrade package provided me with everything I needed, including all of the required wires and a controller for the update. My batteries were kept in excellent condition as a direct result of the controller's effective regulation of the charging process, which prevented them from being overcharged and kept them in optimal condition overall. The 10W solar panels never failed to keep my 12V batteries fully charged and maintained a steady charge during all of my road excursions. I was pleasantly delighted to see that the solar panels were still able to provide a respectable quantity of electricity even on days when the sky was overcast. I was able to extend the life of the batteries in my RV, along with those in my other vehicles, including my boat and motorcycle, by using this continual trickle charging method.