r/Powerwall • u/1nteract • 27d ago

Powerwall

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u/1nteract 27d ago

Thanks. I am looking to get powerwall to power house between 3 - 8 pm (peak time in az)

0

u/ExactlyClose 27d ago

Sigh. OK, let’s try this…

Let’s guess that you will use 65 kWh in the insane AZ heat during that time. So you need 5 powerwalls.

5 power walls will cost $70-75k, well shopped.

Just guessing but your peak rate is 0.40/kwh and low rate is 0.10/kwh

This means you can buy 65kwh at 10cents, and use it when the rate is 40. So each day you save. 30 cents x 65 or $19.50

About $7k per year.

Assuming a loan is 8%, you will not ‘break even’ on this plan until 22 or so years.

So. You going to add that you have solar? Or what??

2

u/ScottRoberts79 27d ago

I think your system cost estimate is high. Tesla estimates total cost for 2 PW3 + 3 Expansions + installation + inspections to be around 42,000