Looking at their website I see a 2-bedroom unit can get by on (1) 14kWh battery.

Am I missing something? Isn't it (aside from cloudy day buffers, cold temps adjusted, etc) the amp hours of the consumers in the house divided by the amp hour of the battery? The tesla pack is about 280...it uses 50 v from its spec sheet.

Does this have to do with approximating DC amps from AC consumers?

 

Am I missing something?

Yes. You need to take the voltage of the mains into account in working out kWh consumed per day.

 

In what way should I consider them?

The voltage inside on the consumers is less than the mains. Shouldn't be using that one?

 

ThirtyWest........please post a spec sheet on the powerwall......so we know what you're talking about.

And please re-state your question......it's very confusing.

 

In what way should I consider them?

The voltage inside on the consumers is less than the mains. Shouldn't be using that one?

No, the consumer would still be using 120V AC for all their connected loads. This would have to be produced by converting the stored DC energy into AC, with efficiency losses in that conversion. 14kWh ought to give 1kW for 12 hours or so, which sounds like a reasonable target.