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 ...

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.

If you’ve ever gone to start your car, motorcycle, or boat and found a dead battery, you’re not alone. Batteries lose power ...

Find the best solar well pump kits for off-grid water needs. See what to look for, how deep they go, and which kits work in 2025.