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@mkbca 

The 2022 law changes, which take affect in 2023, are something of a clarification. The original law only listed “solar power“ and did not make it clear whether that included batteries. Later IRS regulations have interpreted that to mean that batteries alone don’t count, even if they are connected to solar panels. The 2022 law clarifies this by adding a specific credit for battery only starting in 2023. Unfortunately, battery only installations made in 2022 are not eligible.