Just an observation that this analysis doesn't include the powerwall's benefit of also providing backup power when the grid is down. It's hard to know how much this would be worth and certainly would vary from home to home.
On the other hand, since Tesla is also selling a battery specifically for grid backup I would assume that they've done some market research into it and this value might be higher than one would think.
On the other hand, since Tesla is also selling a battery specifically for grid backup I would assume that they've done some market research into it and this value might be higher than one would think.