Today Google updated its Project Sunroof with some pretty striking data on approximately 60 million buildings and the viability for Solar Panels to power them. ELECTREK — According to the search giant, almost 4 in 5 US homes are viable for solar panels with over 90% of homes in sunny states like Florida and California being viable. But even for houses in “not so sunny states” like Maine and Minnesota, over 60% of the homes surveyed were eligible to benefit from solar panels. That’s a huge, untapped market for solar companies. Here are some standout numbers from Google’s data:
![]() NREL’s study, as we said in December, is based on a module efficiency of 16%, but module efficiency keeps increasing, and several higher solar modules from SunPower, LG, Panasonic and Tesla are currently at 20% and going up — so the total will go up accordingly. Last year at this time, NREL estimated that 40% of US energy needs could be generated from rooftop solar. That’s not including utility scale solar installations. Deployment is still the main issue. SolarCity used the data collected by NREL to illustrate the current deployment of residential solar versus what it could be based on NREL’s study. Each little square represents enough residential solar to power ~80,000 homes: As you can see, we’re just at the cusp of solar deployment. Customers in US States like Florida with governments that are hostile to solar and other green energy development will be able to circumvent utilities with lower cost solar/battery combinations.
That’s where Google’s Project Sunroof’s data explorer tool steps in, allowing anyone to explore rooftop solar potential across U.S. zip codes, cities, counties and states.
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