Monkeytom wrote: What problems do you foresee?
The problem with the generator start signal is that it depends only on the battery voltage. It may be that the second inverter is needed when the SOC of the battery is still high. In fact, this would be common: after a full day's solar charging, the battery is full, just in time for the evening peak.
I don't know for sure, but I think if the first inverter overloads, it will switch to grid (go into bypass mode). There is no mention in the manual that this will turn on the generator start relay, though you'd think that would make sense. Hopefully I'll find the appropriate part of the firmware soon to know for sure, or perhaps others have experience with this.
What would be great is if the generator start signal came on a few seconds before the inverter goes to bypass. Then the other inverter could take over half the load and you wouldn't have to have a switch to utility for a few seconds, then another switch back to inverter mode. That might get hard on the relays, and some appliances might get upset.
But the first inverter can only handle 5 seconds at high overload, I think I saw somewhere that it can handle 10 seconds or so at ~125% of rated power. So I don't know that it is possible to give more than a few seconds of "notice" (generator start to mains bypass), and the second inverter may take 10 seconds or so to get started.
I think you need something that senses load current, and operates according to that. It still might take too long for the second inverter to come up to speed. I guess some experimentation is needed here.
It is possible that the slave inverters will turn themselves off as required automatically, so none of this may be needed.
I believe the scc would still function as normal.
I think that's right; the switch is supposed to be only about turning on the inverter (enabling battery mode).
Nissan Leaf 2012 with new battery May 2019.
5650 W solar, 2xPIP-4048MS inverters, 16 kWh battery.
1.4 kW solar with 1.2 kW Latronics inverter and FIT.
160 W solar, 2.5 kWh 24 V battery for lights.
Patching PIP-4048/5048 inverter-chargers.