Victron 150/35 with BT dongle, LiOn Batts at 36 volts, 7X100 watts panels, 12 gauge 25ft cable to the charge controller, when I switch the charge controller to 48 volts, the voltage goes up but the Amperage goes down. If I switch back to 36 volts, the voltage goes down and Amps go up. I understand that is negative resistance, the backup system setup remain the same no other changes, except that when the batteries have been charged at 36 volts to full, I switch to the GTI and divert the charge controller output to the house to use excess power. the GTI can accept 20-60 volts input it can generate up 3.5Kwh on a good day which is half of my daily power consumption year around except during Summer months where my consumption goes way high because of the AC unit.
