More solar-generated energy will be included in the electricity received by Watertown customers. Tuesday night, the Town Council cleared the way for the Town to negotiate “green” electrical contract for all residents and many business customers that will have a small savings, and will include a much larger portion generated by renewable methods. The new Community Choice Aggregation program will be an opt-out program, into which all residents, small businesses and organizations will be enrolled automatically. The goal is to have 50 percent of the energy generated by renewable sources (such as solar, wind generated and hydro), and the rate will result in an estimated savings of $7 a year, said Watertown Energy Manager and Facilities Project Manager Ed Lewis. Watertown customers will have the option of opting for a basic rate (which includes the state required amount of renewable energy), for a plan with electricity from 100 percent renewable sources, or to opt out of the program completely.