KJM

USB ---> serial and the original cable from the inverter that need for WatchPower

In france whe have the neew utility meter (LINKY) and it display not the Watts but KVA and it count a part of KVA and add it to watts used. SBU mode is solar and battery and if not enougth solar and battery is to low it switch to utility. SUB mode is solar + (utility if not enougth solar) and switch to battery if no solar and no utility. Inverter is disconnected from utility and I use it only with solar and battery

it not only briefly sending power to the utility it was peaking at over 1kw and constantly between 250-350 watts with a battery not fully charged, i only use it for 3 months in battery mode only (SUB mode) because inverter need big VA (1560 VA) if not enough power from solar. If the utility is down inverter switch to battery mode (from SBU to SUB)

I have the PIP7248MAX and the PV input is the same as the 8048 (2 x 4000W) with the same voltage range for MPPT and it work better than for exemple the PIP5048GK it begin to work with 80V from PV the only problem is that feedin power to the grid

I have the same invert (PIP5048GK) it work better with 2x6 panels it is more effectiv because it receive more current to start (max current is 18A at the input). The PIP7248MAX is more effectiv with the same amont off panel

New firmware 90.19 did not send power back to grid but no tested