So in a split phase configuration, for example a pair of multiplus 2 3000 120v providing split phase, if one unit were to fail would that render the other unit inoperable (without manually reconfiguring the good unit)?
Alternatively, though not able to provide split phase inverter, if a pair of multiplus 2 3000 2x120 were to be used in parallel, does a single unit failure shut down the other unit?
The system of course is going to be grid tied split phase, though really only concerned about providing 120v backup to keep the heat on.
With today’s 6h power outage I’m really leaning towards setting up a backup power system at home. If we had that kind of power outage on the wrong day, especially when I’m away on work I would be coming back to one heck of a mess.
Any number of units configured as split phase or parallel acts as a single virtual inverter system. If one unit goes down, they all go down. To regain function from the remaining units, reconfiguration is necessary.
There are some configurations where you can disable “switch as a group” in the initial system setup in vequick configure. I don’t know if it applies to split-phase, it can be done in 3-phase systems, but it prevents ESS being used.
As this system would be intended primarily backup/ups I don’t see any need to have ESS
I just want to make the system as redundant as possible. the whole purpose would be to prevent my house and shop from freezing up during a power outage while I’m away at work, but having a pair of inverters would also give me plenty of power to use if I am at home too
The essential loads for a short term (12h or less) outage would only be in the 1500w range, so a single 3000va multiplus should handle it with ease if it has to. Beyond that timeframe which isn’t very likely, those essential loads would double as I would rather not let the fridge and chest freezer spoil!
So the only real way to create a redundant system would be to have say 2 multiplus’s wired in series, which of course means 2 battery banks. That doesn’t sound very economically feasible, especially since the 2 units couldn’t be used together for added output
Maybe I’ll just have to pray the system doesn’t go down while I’m not home