HiTech wrote:
Measuring Voc requires a disconnect of the PVs from charging and is generally a sign of a crude MPPT strategy. Who still uses this?
I think Salvo meant that controller "can" measure battery voltage via power cables accurately when there is no charging current. Which is correct. The problem is that there is always some current.
Well - since users complained on "inconvenience" of accurate voltage sensing with separate cables, those who don't care about under-voltage, should be happy now :) ... If the battery is sitting next to controller, there is not much error, but then, there is not much inconvenience with extra sensing wires either. Whatever...
Correction to my previous post - it has to be ~6ft from battery to controller, to get 1% error at 30A. 12ft total run.
