Zwy
Solar Wizard
Could be done but why do it if not needed? Was an energy audit performed?How would they share surplus and avoid inefficiency/lost production? Standard stacking of the inverters on same batteries?
There isn't enough battery there to run 2 houses. It will probably take at least twice that amount to run 2 houses minimum, probably more. If 2 separate systems and one has higher loads, move more battery reserve to that house.
Combining inverters at a central point can lead to much higher hardware and wiring cost. Everything gets up sized. Timing is another item, if most loads in each house are on at the same time such as around meals, then does combining inverter output at a central point make any sense? Currently each house is fed power thru the 100A breakers from what I see. If combining systems, then wiring will most likely need to be changed as two 18Kpv's can output more than 100A. It would be much less costly to leave the current 100A wiring to each house in place, install an 18Kpv at each house and wire the 100A circuit into the 18Kpv input. Wire and install is never cheap. Don't forget the conduit will need to be upsized too. This also avoids the 125% rule.