Solar payback periods can vary widely, and also depend on how you pay for the system in the first place ... but it's more complicated," Haenggi said. Calculating your potential payback period ...

Another solar cost factor people don’t always consider is the condition of their roof. System size Your average household energy consumption tells you how big of a system you need. For a typical ...

Your energy consumption and usage patterns The size of your solar system Your feed-in tariff ... However, it's best to calculate saving estimates based on your household and a solar payback ...