ISO-NE publishes amounts, sources of electric energy used to meet demand in 2021

ISO New England has published a breakdown of the amount of electricity produced by generators in New England and imported from other regions to satisfy all residential, commercial, and industrial customer demand from the power grid in 2021.

Known as net energy for load, or NEL, these numbers are calculated by adding total electrical generation and price-responsive demand within New England with net imports and exports to neighboring regions, then subtracting the energy used to operate pumped storage power plants. Numbers are preliminary until the 90-day resettlement process is complete.

The chart below contains a brief breakdown of the resources used to meet NEL in 2021. More detailed information is available on the Resource Mix webpage.

Energy Source	Energy Produced (in gigawatt-hours)	Percentage of NEL
Natural Gas	54,227	46%
Nuclear	27,074	23%
Net Imports	18,718	16%
Hydro	7,345	6%
Wind	3,611	3%
Refuse	2,984	3%
Solar	2,648	2%
Wood	2,416	2%
Coal	559	0.5%
Landfill Gas	435	0.4%
Oil	228	0.2%
Other	43	0.04%
Methane	39	0.03%
Price-Responsive Demand	31	0.03%

Historical data on consumer demand for electricity, and how that demand was met, dating back to 2000 is available in spreadsheet form on the Net Energy and Peak Load webpage.