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MMLD's Power Portfolio

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Supplying Marblehead with Electricity from Carbon-Free Sources is Important to Everybody

MMLD is Working Toward a Cleaner Energy Future—Today

The mission of the Marblehead Municipal Light Department is to provide our customers safe and reliable electricity, generated by environmentally responsible power sources, and delivered at competitive, stable prices.

Today, we’re working on multiple fronts to reduce our town’s carbon footprint:

  • Methodically moving our power sources away from traditional fossil fuel power plants to carbon-free and higher efficiency, low carbon-emitting sources
  • Offering promotions for Electric Vehicles (EV) and residential EV Chargers
  • Building a townwide infrastructure for public EV charging
  • Offering FREE home energy audits and rebates on new energy-efficient home heating and cooling solutions
  • Anticipating the addition of off-shore wind to our portfolio, when it becomes available
  • Actively evaluating new Community-scale solar PV installations in Marblehead and elsewhere
  • Planning Community-scale battery electric storage systems to lower our monthly energy use during peak hours, when less efficient carbon-emitting plants need to run
  • Planning a main substation upgrade with increased electric power capacity and battery electric storage, in anticipation of increased demand for carbon-free electricity by Marblehead residents

READ MMLD'S RESILIENCY REPORT TO THE TOWN

MMLD’s Carbon-Free Power Mix in 2023—96,828 MWh from Non-Carbon-emitting Sources

42%

MMLD's Total Wholesale Energy Supply Portfolio

Power Source 2022 Actual Energy (MWh) 2023 Actual Energy (MWh) Percent Change
Millstone Nuclear 13,951 12,704 -9%
Seabrook Nuclear 14,755 12,882 -13%
NY Power Authority Hydro 8,093 7,858 -3%
Hydro Quebec 6,570 6,570 0%
Berkshire Wind 1 2,180 1,464 -33%
Berkshire Wind 2 1,328 1,272 -4%
Hancock Wind 2,341 2,076 -11%
Eagle Creek Hydro 1,789 2,542 +42%
Stony Brook Intermediate 2,793 446 -84%
Hedged Power Contracts 21,769 33,988 +56%
ISO Interchange Spot Market 30,838 21,012 -32%
Marblehead Wilkins Plant 109 62 -43%
Stony Brook Peaking 97 85 -12%
Total Energy Supplied to Marblehead 106,613 102,961 -3.4%

MMLD Carbon-Free Wholesale Power Sources: 2023

MMLD Carbon-Free Wholesale Power Sources Energy (MWh) RECs/
EFECs*
held		 RECs sold Energy purchases without RECs
Millstone 3 Nuclear 12,704 12,704    
Seabrook Nuclear 12,882 12,882    
NY Power Authority Hydro 7,858 7,858    
Hydro-Quebec 6,570 6,570    
Berkshire Wind 1 1,465   1,465  
Berkshire Wind 2 1,272   1,272  
Hancock Wind 2,077     2,077
Eagle Creek Hydro 2,542     2,542
Carbon-Free Supply Total 47,370 40,014 2,737 4,619
MMLD Solar Rebate RECs held by Go Green Now! Program   124    
Customer REC Retirements   288    
Total RECs & EFECs held/retired   40,426    
MMLD Total Retail Sales (MWh)   96,828    
MMLD Carbon-Free %   42%    

*Renewable Energy Certificate/Emission-free Energy Certificate

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