The child asked me why the sales of solar-powered RVs are very small, and how to answer it properly?

Solar RV is more dependent on the weather. It's fine on a sunny day, and you can save money if you have enough electricity. However, if it rains for several months like the "wandering sun" in the postal area now, the solar RV will be even more tasteless. Therefore, at present, solar energy can only be used as an auxiliary in the RV, and it is mainly necessary to charge to ensure the use of our daily travel.

Most solar RVs like this are just concepts, and few of them are actually put into production.