342 Watts per square meter on average over the entire Earth, averaged over the entire year. https://www.nasa.gov/wp-content/uploads/2015/03/135642main_balance_

342 Watts per square meter on average over the entire Earth, averaged over the entire year. https://www.nasa.gov/wp-content/uploads/2015/03/135642main_balance_trifold21.pdf https://www.nasa.gov/wp-content/uploads/2015/03/135642main_b... Put some panels on your roof and it's not hopeless.