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 ...

solar panels and electric vehicles both operate with direct current (DC), meaning there's no need to install an inverter between your panels and EV, although a charge controller is still ...

Solar power ... happened upon a 450W PV panel on the cheap. Sadly, the panel was a commercial unit, and compatible off-the-shelf MPPT, or maximum power-point tracking, controllers are expensive.