RES completes AC- and DC-coupled battery systems for Dominion Energy for 48 MWh of storage

RES has completed the Scott Battery Energy Storage System (BESS) pilot project, commissioned by Dominion Energy. The 12-MW/48-MWh project consists of three independent systems in one location: an AC-coupled battery and two DC-coupled batteries retrofitted to an existing solar PV plant, the first project in its species in Virginia.

“The completion of this pilot project is a milestone for RES and Dominion as it paves the way for additional energy storage projects needed to support a carbon-free future,” said John Rohde, CEO of RES in America. “We couldn’t be prouder to partner with a company as committed to providing clean, safe, reliable and affordable energy as Dominion Energy. This is a huge achievement for everyone involved.”

The AC-coupled BESS is a 10 MW, 4 hour system that attempts to match peak production to peak load demand. It is the first BESS in the country to use CATL battery cells and Dynapower components with RES’ REsolve EMS controller.

The two DC-coupled batteries are each 1-MW, 4-hour systems that are charged by collecting truncated energy (energy that would otherwise be lost when the output potential of a solar panel exceeds the amount of power an inverter can convert) directly from the existing solar panels. The batteries integrate the same technology into the existing inverters through custom recombiner boxes and Reverse Current Mitigation devices specially designed and engineered by RES, EVS and ConnectPV.

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