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" ?
Explanation
Distributed energy resources are small, decentralised units that generate or store electricity close to where it is used, instead of in large central power stations. Battery storage, biomass generators, fuel cells and rooftop solar photovoltaic units all qualify, so all four are distributed energy resources.