This Low Dropout Voltage (LDO) solar charge controller uses a simple differential amplifier and series P channel MOSFET linear regulator –their compatibility seems like a marriage made in heaven.

Men’s Journal aims to feature only the best products and services. If you buy something via one of our links, we may earn a commission. The dark side of owning a car jump starter? Its battery can die ...

David Kuchta, Ph.D. has 10 years of experience in gardening and has read widely in environmental history and the energy transition. An environmental activist since the 1970s, he is also a historian, ...