Review on 🔋 ATEM POWER 12V 40A DC to DC Battery Charger with MPPT Solar Panel Controller and Multi-Protection Design - For Lead Acid, AGM, Gel, Calcium, LiON Batteries by Tim Harrington

UPDATE: Charges the battery and turns off. Well! But then it won't turn back on until the battery voltage drops, which is a problem for LiFePO4. These batteries do not lose voltage until they are discharged. This means that this device does not actually use solar energy or an alternator to power it, even when they are available. On a sunny day, I noticed that my van was drawing more than 10 amps, no power was arriving and the gauge was showing "fully charged". It should draw 10 amps from the solar array and leave the battery fully charged. If you don't need sensors or apps and just want to charge your battery any way you can, this is your ticket. Delivers a full 40 amps (about 35) of power and automatically switches between solar and generator. Fairly easy setup, nice little device, and unlike some competitors, you can use larger cables if you need to. One thing - despite being an MPPT, it's limited to a 25V input. So if you have more than one panel, connect the cable. parallel.