The location of the inverter that we would suggest is the storage room next to the garage where the PB1 is. We would use one single unit (if ON-GRID) to be hanged on the wall, therefore it wouldn't take a lot of space. Necessarily we would need pre-installed pipes/ducts of ⌀40mm that connects all the three roofs to the storage room (respectively 2 pipes per each roof), and also one single pipe connecting the storage room to the transformer location.