That's a great hack, Cor! Easy and effective. On Sun, Aug 2, 2026 at 11:56 AM Cor van de Water <[email protected]> wrote:
> Hi Phil, > I forgot to write it down when I measured, but it was low enough that > there was essentially no charging current, so I think closer to 13V. > As a hack to keep my older battery charged, I disconnected the current > sensor on the aux battery terminal, so the car would constantly see a large > (negative) current from the bidir sensor that I think outputs a 0-5V for > something like -100 to +100 A of measurement, 0A being in the middle so > 2.5V. > I still use that hack today, to keep my smallish Lithium aux battery > charged up to 14V. > > Oh, when I check old screenshots of LeafSpy, then it shows either 12.96 or > 13.04V, I presume that is the ADC resolution (0.08V on a 5V range means 6 > bits??) and a charge current of 1A. > Without sensor connected, it shows 13.92V at a reported current of > -105.37A due to the unconnected sensor input. > Cor. > >> >>>
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