Consider the following: 1. Battery storage 2. Biomass generators 3. Fuel cells 4. Rooftop solar photovoltaic units How many of the above are considered “Distributed Energy Resources”?

All four

Distributed Energy Resources (DERs) are small-scale energy generation, storage or related resources located close to where electricity is consumed. Battery storage can store and release electricity locally. Biomass generators and fuel cells can provide decentralized electricity generation. Rooftop solar photovoltaic units generate electricity at the point of consumption. Thus, all four qualify as DERs. Options A, B and C are incorrect because they exclude one or more technologies that fall within the definition.