Data logging and high efficiency are important for a charge controller, because batteries vary in their characteristics as they recharge and the power generated from things like solar panels ...

Inside, he’s siliconed a 15AH, 12V lead-acid battery in the centre ... 1/8″ plywood and secured a 20A solar charge controller, a four-in-one socket panel, and two banana plugs on its top ...

Read more: Battery Brands Ranked From Worst To Best To understand how a solar panel phone charger works, you really just need ...