Tiny 2-cell solar panel charges batteries in compact, off-grid devices
Fran Hoffart
Abstract
A method of producing a compact battery charger that operates from a small 2-cell solar panel is described.
Keywords
Battery charger
solar panel
LTC3105 boost converter
LTC4071 shunt charger
Introduction
Advances in low power electronics now allow placement of battery-powered sensors and other devices in locations far from the power grid. Ideally, for true grid independence, the batteries should not need replacement, but instead be recharged using locally available renewable energy, such as solar power. This Design Note shows how to produce a compact battery charger that operates from a small 2-cell solar panel. A unique feature ...
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