How many of the above are considered Distributed Energy Resources?

How many of the above are considered Distributed Energy Resources?

Consider the following: Battery storage Biomass generators Fuel cells Rooftop solar photovoltaic units How many of the above are considered Distributed Energy Resources? (a). Only one (b). Only two (c). Only three (d). All four  Explanation: All four of the options listed are considered Distributed Energy Resources (DERs): battery storage, biomass generators, fuel cells, and rooftop solar photovoltaic units. DERs are small, local generation units that are connected to the distribution level of the grid. They are often renewable and can provide power close to where it's used. Battery storage allows for storing energy for later use. Biomass generators produce electricity from organic matter. Fuel cells convert chemical energy into electrical energy.