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Originally Posted by NeilBlanchard
Your price is way off - a PowerWall costs about $6,000; not $15K.
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You provided a source, but irrelevant to the cost of a home installation. Posting for the third time:
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Adding a battery can add from about $6,000 to $15,000.
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A standard Powerwall has a capacity of 13.5 kilowatt-hours.
That is enough power to run lights in a home and maybe a refrigerator for several hours.
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A standard air-conditioner draws about 4 kilowatts of power though, so a Powerwall could only supply that for a little more than three hours of constant use. And air-conditioners require a large surge of electricity just to start up, which may require more than a single battery.
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$15,000 for two Powerwalls, an inverter, and installation.
https://www.azcentral.com/story/mone...els/772014002/
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To buy and install the battery outside of financing a solar deal, the price is $7,140. [...] The price to go completely off the grid is even higher because that would require a rooftop solar system bigger than what is now usually installed, and at least two Powerwall batteries. That kind of system would cost $96,000 without subsidies, about 74 years of electric bills for an average U.S. customer. [...] Even assuming the cost of solar and batteries declines by 80 percent in the coming years and that it will be subsidized by clean-energy incentives, the system would still cost 2.5 times more than buying electricity from the grid.
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https://www.azcentral.com/story/mone...tery/27820661/
So, there is another point that I have made, the standard solar installation would be inadequate to power the house, and charge the batteries, so you need even more solar.