Whether you often camp off the grid, go backpacking, or grapple with power outages, a solar charger is a nifty gadget to have in your arsenal. It can charge your phones, tablets, mobile ...

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 ...