I wonder what $400 covers. There’s a logic for this number. Supply is tight, cobalt has increased price, company needs a touch more profit to fund Model3 built out, etc – or many other thought processes. $437/kWh isn’t such a bad price for an all in one system – $111-200/kWh brings installed to $548-637/kWh. Still not bad for a small system.
SOURCE: The $5,900 price is only for the Powerwall. Tesla still lists $700 in “supporting hardware” needed and they estimate installation cost between $800 and $2,000.