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 ...

Sadly, the panel was a commercial unit, and compatible off-the-shelf MPPT, or maximum power-point tracking, controllers are expensive. His solution was to build his own controller using a cheap DC ...

It uses a backstepping controller (BSC) algorithm to adjust the ... Under these conditions, the conventional Maximum Power Point Tracking (MPPT) methods could fail to maximize the output power ...

The performance of the system was evaluated considering operating efficiency and stability and the scientists found that a device relying on a variable-speed compressor and an MPPT controller ...