Va. went all in on solar. Then its powerful utility changed the rules.

Four years ago, Fairfax County announced a landmark clean energy plan to install solar panels on more than 100 buildings including schools, community centers and government facilities. But progress on that goal — which the county estimated would save $60 million in utility costs over 25 years — has stalled after the state’s biggest utility imposed expensive grid connection requirements that solar proponents say make those midsize projects not viable.

Fairfax had completed six projects before Dominion Energy changed the requirements for midsize solar in December 2022. Since then, the county has downsized two projects to fall below the requirements’ parameters, while five others — including a police station, stormwater complex and library — are on hold. Fairfax is moving ahead with a five-megawatt installation at its landfill complex in Lorton despite an increase of $1.7 million to connect to the grid.

Across the state, the company began requiring upgrades for a “direct transfer trip,” which automatically disconnects a system, on some projects. That includes laying a dark fiber optic transmission line to a substation at a cost of $150,000 to $250,000 per mile and in some cases adding a relay panel that runs $250,000 for projects exceeding 250 kilowatts, raising costs by 20 to 40 percent.

The Washington Post