Within a decade, more than 35 million buildings may be generating their own solar electricity (without subsidies) at prices lower than their utility offers, sufficient to power almost 10% of the country.

That’s the powerful headline from the Institute for Local Self-Reliance’s latest report, Commercial Rooftop Revolution. Despite the opportunity, utilities, regulators, and policy makers are largely unprepared for the surge of local solar power.

See a summary of the report in the slides below (or read on):

In Minnesota, for example, the state’s largest utility expects just 20 megawatts of new solar power in the next 13 years, according to its draft filing with the Public Utility Commission. But within 10 years, according to the report, unsubsidized solar electricity will be so inexpensive that 200 times more solar (over 4,000 megawatts) could be installed on the rooftops of Minnesota homes and businesses, providing lower cost electricity than from the utility.