I am using a Yeeco battery meter in a configuration with a pair of photovoltaic panels, a pair of AGM batteries, a charge controller and an inverter. a pretty handy tool for monitoring stats and battery status. The accuracy wasn't perfect (voltage and current draw) compared to my multimeter, but it was definitely close enough to know what my batteries were doing. The screen is fairly legible, but you can improve legibility by flipping the polarizer. highlighted.
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