3 links have been added on this idea.
  1. There are portable solar-powered car AC coolers that you can buy! Check out one here https://www.amazon.com/MASO-Powered-Exhaust-Radiator-Purifiers/dp/B07TXH7HMP

  2. Solar-powered air conditioning is a gamechanger as it means you can keep your car cool without running the risk of draining the battery during an idle park.