MPPT solar charger

Lukas Fässler has designed and built an MPPT solar charger: One of my main goals with this design is to archieve very low standby current, somewhere in the tens of microamps. The basis for this is a low-power buck on the basis of a Texas TPS62120 where the microcontroller can switch the output voltage between […]

6 Volt 5 Watt solar charge controller

Steve made this 6 volt 5 watt solar charge controller project, that is available at Github: Here is a 6 volt 5 watt solar charge controller project using a dedicated printed circuit board from dirtypcbs.com and an Arduino pro-mini. The board uses sot-23 low RDSon P channel mosfets (Si2369). It has voltage and current sensing, and 3 […]

Scalable 12V solar power system and battery charge controller

Squonk writes about this scalable solar charger he’s located: An unconventional, scalable high efficiency 12V solar power system and battery charge controller with low voltage cutout to protect the battery. (ideal for systems of 50W or less). The most common solar charger consists of a Schottky diode to prevent the battery from draining into the […]