Part of the problem is grid tie inverters. 1 kW used to cost about 10 times more than the equivalent 1 kW computer power supply, but prices have finally dropped

Part of the problem is grid tie inverters. 1 kW used to cost about 10 times more than the equivalent 1 kW computer power supply, but prices have finally dropped to the point where they are comparable (roughly $100/kW): https://www.ebay.com/sch/i.html?_nkw=grid+tie+inverter https://www.ebay.com/sch/i.html?_nkw=grid+tie+inverter https://www.amazon.com/s?k=grid+tie+inverter https://www.amazon.com/s?k=grid+tie+inverter IMHO power converters like these are the future, because eventually we'll plug in all noisy sources of power from wind/solar/thermal into an inverter that accepts any voltage and plugs into the wall to provide 110 V AC. So roughly 12 of these (for a typical 100 amp system) would power the average home, meaning the inverter portion of a Powerwall should cost no more than $1200.