hogback
Solar Enthusiast
So I'm soon to replace a single xw+ with dual pros. No external transfer switch. Because of the inverter internal relay (I'm off grid but have a generator for low battery (rare) and it does exercise monthly), the combined load during a switch cannot be above 60A. So, by having two pros instead of one, I can use what would have been the surge capacity of a single inverter, but continuously, but I cannot take advantage of the surge capacity of the combined system. If the system happened to switch to generator during a surge with more than 30A/inverter.... this is no good for the relays. 30A is 7200W, so not much into the surge realm above 6800W.
Am I missing something? I need to decide on wire awg to service panel and main breaker size. 60A would trip before endangering a switch during surge, but then I loose most surge capacity. 100 or 120A would get me full surge, but the danger of a switch and frying the relays.
I have 52kWh batteries now, so not likely to need generator, and I can disable the genny exercise and only do it manually when I know the loads are low. But.... what if I add more loads over time, and somebody turns on a hairdryer when the car is charging and I'm cooking on induction.... maybe still there is battery soc but the V sag causes the generator to click on. I am open loop so no soc info is on xanbus.
On one hand, I think I can just disable the ags and keep an eye on things when it been raining for days, but on the other, Murphy is out there....
Opinions?
Thanks,
Am I missing something? I need to decide on wire awg to service panel and main breaker size. 60A would trip before endangering a switch during surge, but then I loose most surge capacity. 100 or 120A would get me full surge, but the danger of a switch and frying the relays.
I have 52kWh batteries now, so not likely to need generator, and I can disable the genny exercise and only do it manually when I know the loads are low. But.... what if I add more loads over time, and somebody turns on a hairdryer when the car is charging and I'm cooking on induction.... maybe still there is battery soc but the V sag causes the generator to click on. I am open loop so no soc info is on xanbus.
On one hand, I think I can just disable the ags and keep an eye on things when it been raining for days, but on the other, Murphy is out there....
Opinions?
Thanks,