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 ...

But charging something like that or an eBike is a great use case for solar, especially since [Tim ... or maximum power-point tracking, controllers are expensive. His solution was to build his ...

"People every day without power sources have a device that needs charged," said an inventor, from Orlando, Fla. "My Octopus Solar Charger invention allows all people the same advantage to charge on ...