Dominion Energy has announced plans to construct a solar farm in Middlesex County.

The project will be located on a 120-acre site near the intersection of General Puller Highway (Route 33) and Bob’s Hole Road (Route 625), Hartfield, said Dominion spokesman Rob Richardson.

Plans are for construction to begin late this year, Richardson said, with commercial operations underway by the end of 2018.

Dominion plans to have more than 55,000 solar panels on the site, enough to power 3,750 homes at peak output, Richardson said. The panels will have single axis tracking technology to gather sun rays.

Under a 25-year agreement, the University of Virginia will purchase the entire output of the Middlesex solar facility. The new facility, which was developed by Coronal Energy with a regional office in Charlottesville, will produce an estimated 15 megawatts of alternating current, or about 9 percent of UVA’s electric demand.

Dominion previously announced plans for a 160-acre Hollyfield solar facility in King William County. That facility, plus the one in Middlesex, combined will offset about 21 percent of UVA’s electric demand.

The Hollyfield site will produce 17 megawatts of solar energy, a Dominion release said. Richardson said the King William facility is expected to be in operation this October.

“The University of Virginia has been a vital partner as we continue to make significant progress in the development of renewable energy,” said Keith Windle, vice president of business development for Dominion Energy.

 An unrelated solar farm has been approved to be built on a 200-acre site off Route 14 in Gloucester. That project is to feed its captured solar power into the regional electric grid.