> it wouldn't make sense unless the car spent the majority of it's time parked in the sun between locations.
That's exactly what people do with these things. You drive them for a few hours. Then you park it and you go off enjoying nature, or whatever it is what people do while camping for the next few days. Most cars in fact don't drive the vast majority of the time. They just sit there parked for well over 90% of the time.
It's not going to make a massive difference to range of course. But even keeping the battery at the same level or slowing down energy depletion while you are camping helps. And best case, you actually leave the camp site with a bit more range than when you arrived there. That's useful.
That's exactly what people do with these things. You drive them for a few hours. Then you park it and you go off enjoying nature, or whatever it is what people do while camping for the next few days. Most cars in fact don't drive the vast majority of the time. They just sit there parked for well over 90% of the time.
It's not going to make a massive difference to range of course. But even keeping the battery at the same level or slowing down energy depletion while you are camping helps. And best case, you actually leave the camp site with a bit more range than when you arrived there. That's useful.