They already exist, example: https://hycleaner.eu/en/produkte/hycleaner-solarrobot/ https://hycleaner.eu/en/produkte/hycleaner-solarrobot/ though they cannot

They already exist, example: https://hycleaner.eu/en/produkte/hycleaner-solarrobot/ https://hycleaner.eu/en/produkte/hycleaner-solarrobot/ though they cannot "jump" from one line of panel to the other, so they are suitable only on continuous surfaces.