This is one for the solar power experts. I know very little about solar power. I live in a small strata complex of 17 terraces in the inner city and our executive committee (of which I am a member) is proposing to raise a special levy to install solar panels on our roof (with battery storage like the Tesla PowerWall at the individual lot owner's expense). Apparently due to our available roof space and some other factors the best we will be able to get is 4kW each. I support the proposal but as I have a 90kW Model S in the garage and a 4-level house with a/c running a lot of the time, the prospect of capturing 4kW doesn't sound like it will go very far towards meeting my family's consumption. So I was wondering whether any solar power experts on the forum might either be able to reassure me or else direct me to some methods of maximising the kW obtained?