My total lot is under 5000 square feet (about 450 square meters), much of which is covered with house. I do have rooftop solar.

A few other notes:

- On average, both petrol and electricity is more expensive in CA than most of the US

- Petrol is expensive throughout the state, but electricity can be cheap if you live in a city with public utilities (The city of Sacramento has a public utility and rates are about half what they are on a private utility where I am).

- Peak rates are about $0.55/kWh (41p), but off-peak times are a generous 19 hours a day 21:00-16:00) in the summer, mainly because there is so much solar, so we have the "duck curve[1]" here.

- I live near the coast, so get fog in May and June, but July and August I generate quite a bit (over 10kWh per day this July).

1: https://en.wikipedia.org/wiki/Duck_curve

You note that you have rooftop solar - how is that going?

I'd love to deploy it but the south facing side of my house has three dormers on it which means: I'm stuffed. I can't fit panels on a 12m (40') long roof, with inclusions.

I wish you all the best, mate.