A few years ago, [Lukas Fässler] needed a solar charge controller and made his own, which he has been improving ever since. The design is now mature, and the High Efficiency MPPT Solar Charger ...

The BougeRV 40A MPPT Solar Charge Controller features remote app control, LCD display, and multi-voltage compatibility. This charge controller provides efficient solar charging for various battery ...

As such, solar projects have become a bit boring, so it’s not often we see one that attracts our attention the way this dirt-cheap open-source solar project does. The backstory on [Tim O ...