The main challenge is not production but storage - e.g. several people I know have solar panels on their roof, sometimes with 5x their electricity peak usage wi

The main challenge is not production but storage - e.g. several people I know have solar panels on their roof, sometimes with 5x their electricity peak usage without a way to store that electricity for later/night usage. The slow uptick of EVs in Germany is partialy part of the problem, it would be the easiest way to increase storage. As a tought experiment, if all cars in Germany would be EVs, those could store 2 days of electricity usage. For flat owners solar panel usage increased a lot, but battery production is way behind, the first usable ones arrived this year, but it will take some more years to get out of BETA. Also energy providers in Germany fight this tooth and nails, e.g. there is no easy way to get to the current usage data of your flat to regulate battery usage from solar storage ("zero feed-in").