I am building a double conversion UPS using a 120V to 12 volt power supply to the solar panel input in a Victron SmartSolar MPPT to a 12V to 120V inverter, and a LiFePO4 12 volt 100AH battery. This will supply power to 3 computers. Any thoughts? I see that @markus looked at this before. Any others? My three computers use about 300 watts and my inverter can go to 2000 watts.