> Birch points to Australia, where he said the average 7 kW solar array with a 7 kW battery costs $14,000. That equates to $2.02 per W, with batteries included.
$ 2.02 per Watt
> In the United States, that same solar and battery installation averages $36,000, said Birch. Permitting alone can take two to six months, and the cost per watt of a solar plus storage installation is up to 2.5 times the Australian price, landing at $5.18 per W.
$ 5.18 per Watt
> [...] Residential solar is about to get more expensive as the 30% investment tax credit expires at the end of 2025.
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