> you basically top up the battery a little bit for free. This is undeniably true. The catch is how very little that "little bit" actually is. I have both a b

> you basically top up the battery a little bit for free. This is undeniably true. The catch is how very little that "little bit" actually is. I have both a boat and a travel trailer powered with solar (I occasionally plug in the travel trailer but the boat is 100% solar-only). And I've been planning on adding solar to a truck camper. So I'm a big believer in power independence through solar and I'm fairly familiar with the pros (free electricity off the grid) and cons (so very little power). For my use cases it just about works, by being very frugal with consumption. But these are use cases where the typical consumption is in the tens of watts. An EV uses tens of kilowatts to move itself. Three orders of magnitude more. Trying to run that off its own rooftop solar is akin to pouring a cup of water into Lake Mead to bring up the water level.