Electric utilities; surplus interconnection service sites. Directs Appalachian Power and Dominion Energy Virginia to undertake a comprehensive assessment of available interconnection capacity at each such utility's existing and planned intermittent electric generation facilities located in the Commonwealth. The bill directs such utilities to establish pilot programs for energy storage resources and solar generation facilities that utilize surplus interconnection service, as defined in the bill, including a request for proposals. The bill requires such utilities to submit the results of such requests for proposals as part of their 2027 plans and petitions for approval for the development of new solar and onshore wind generation capacity, which plans are required under existing law.