Oh yeah, I got one. It is a little voltmeter that plugs into a 12V socket (cigar lighter style).
Almost useless. I rely on the Blue Sky solar charger readout.
Mike
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Alaska to Key West, Labrador and more
Prostate cancer survivor. See Thread Prostate cancer and Sportsmobiles
2015 VW GTI 2020 Fiat 124 Spider
2012 E250 Hitop camper