Whats the payback period?
A residential system in western Washington will typically pay for itself in around 10 to 14 years. Considering that the panels come with a 25-year warranty, and have a 30-40 year design life, that basically means that after the first 14 years, they’ve paid for themselves, and then they go on to generate 15-25 worth of ‘free power.’ That’s 30 years of positive cash flow, money in your pocket in the form of avoid electric bills.
