Tesla car sales are in decline. Now, some people don’t want Tesla’s solar batteries either

For years, Tesla made the world’s best-selling electric vehicles—but that’s begun to change. As a response to Elon Musk’s apparent Nazi salute and his involvement in dismantling key federal agencies, both Tesla stock and sales have declined. “Tesla Takedown” protests have popped up across the country (and the world), and even the value of used Teslas is depreciating.

But EVs aren’t the only electric product Tesla makes. The company has also been a big player in the solar industry, with its Powerwall home batteries...