But if you look at the whole plane, the electric one will be about double the weight. What about the landing gear? Brakes? Control surfaces? All double size.

But if you look at the whole plane, the electric one will be about double the weight. What about the landing gear? Brakes? Control surfaces? All double size. The battery will likely be a somewhat complex system with active cooling and monitoring and will need maintenance. They are aiming for higher than car level energy to weight ratios. If they use a battery with air as a component, that's also again somewhat more complicated. There's probably a trade off point in flight hours per year, above which the electric plane is more affordable. Depends on finances, too since likely it's more expensive to acquire.