Those numbers seem widely optimistic and probably assume the panels are always optimally generating, when panel placement is a huge performance factor.

Those panels are maybe generating 0.1 kwh in the top quartile of exposure, and have a battery over 50 Kwh in capacity.

On an amazing day you may charge a single kwh. That's a 2% increase at best.

Every single naive person asks why they can't put a solar panel on a car and get rid of gasoline. They don't understand the surface to output relationship of solar power. This is mainly a marketing gimmick. Ideally those panels could be optimally placed and generate their full potential. Using them so inefficiently is a waste.