EVs have been expensive in part because it costs money to switch production from ICE or build new production capacity, and to establish supply chains and take advantage of the economics of scale. That's a huge investment, but one that they have to make if they want to remain competitive in the long term.

The bigger issue has been that they aren't designing lower cost EVs. It's not exclusively an EV issue since they have been moving away from lower cost ICE vehicles for years too, it's just that EVs didn't have existing low cost product lines, and they're more interested in delaying EVs and using them as HALO products than in building a functional but low margin model. To say nothing of the many dealerships that have no interest in selling EVs and would rather steer people to a high margin gas guzzler.

As for solar, at the grid scale it's the cheapest power source available, with or without government funding, not to mention the fastest to deploy. And residential solar does make sense even without incentives. It will pay for itself, it's just the upfront cost that's the problem.The incentives make that easier, but even without them and with the need for financing, you still come out ahead as long as your monthly payment is in the same ballpark as your electric bill because the solar payments will stay the same over time until the loan is paid off, while your electricity rate will only ever go up.

Chinese EVs and solar panels are dirt cheap. They become expensive because of tariffs. And western car companies really don't like to invest in EVs because planning ahead 10 years won't pay off right NOW.