5mv/cell/degreeC
Theoretically my mppt solar controller is supposed to adjust the Absorb and Float set points by -5mv/cell/degreeC against a 25C standard. I have a 12V bank of 4 GC2s. So that is 6 cells? or 30mv/...
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Last I checked my Morningstar, via data dump, it was right on the money. It's set at 3mv. The rogue from all I've heard are very good.