The Growatt 48V 12KW inverter is on my short list for purchase for off grid/UPS use. In the manual it recommends at least 400Ah of battery capacity. Knowing I won't get full performance out of the system my question is: What is the minimum battery capacity for this system to operate? I am considering an EG4 LiFePO4 100Ah battery to start with then add additional units. I emailed SignatureSolar last week but no response yet. FYI my ground mount solar array is 30 of the SanTanSolar white label 250W 60 cell panels.