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"?
AOnly one
BOnly two
COnly three
DAll four
Answer & Solution
Correct answer: D. All four
Answer: D. All four are considered Distributed Energy Resources (DERs).
DERs are small-scale energy generation or storage technologies located close to where energy is consumed, as opposed to centralized utility-scale power plants. They typically connect to the distribution grid.
(1) Battery storage: classic DER — provides energy storage and grid services at consumer or distribution level.
(2) Biomass generators: small-scale generators using agricultural or organic waste; widely used DER especially in rural India.
(3) Fuel cells: stationary fuel cells used for backup or primary power at building or industrial scale qualify as DERs.
(4) Rooftop solar PV: the most widespread DER globally — distributed generation directly at the consumer site.
All four qualify, hence D.
Source: Ministry of Power / IRENA / IEA distributed energy resource definitions.
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