>Seattle is below Paris in latitude. Plenty of sunlight. That is definitely not the problem in terms of energy production. Tesla has a pretty detailed solar po

>Seattle is below Paris in latitude. Plenty of sunlight. That is definitely not the problem in terms of energy production. Tesla has a pretty detailed solar power estimator that uses historical daily sunlight levels at a fine-grained level. When I used it, the time to pay off my costs was close to 25 years, and that involved a lot of assumptions about future energy prices.