Comment by thechao
I don't know about 43kWH/5400$. But, here's the system I've been looking at:
https://www.expertpower.us/products/10800w-50kwh?_pos=2&_sid...
That's 50KWH of battery, plus the 10.8KW of solar, inverters, etc., all for $17K. That system is microgrid (not grid following) capable; so, you can run it during a blackout. The switchover is pretty good, too, so you don't need a second backup system.
I would definitely get EG4 over Expert Power for the reasons posted by other commentators.
Example kit:
https://signaturesolar.com/complete-off-grid-solar-kit-eg4-6...
Add in a 15 kWh module and it's roughly the same price with better customer service, reliability, less parts, etc.
However, I would just get an EG 18k PV, 45 kWh of EG5 batteries and 11.4 kW of solar panels from signature solar and that would cost you $18.5k