Price calculator

Use the calculator below to compare your electricity supply costs (the costs of the actual electricity) to National Grid’s Basic Service costs and to quantify the greenhouse gas benefits of opting up to the PowerChoice Green option and 100% renewable electricity.

Please note: Your electricity delivery costs (the costs to bring electricity to your home or business) will not be changed by your participation in Nantucket PowerChoice.

To use the calculator, find your monthly electricity use (in kWh) on your National Grid electricity bill and enter it into the box below.

Your monthly electricity use:  (Enter the number of kWh you use in any given month)

Nantucket PowerChoice Costs and Benefits

Price information PowerChoice Standard PowerChoice Green
Receive 100% renewable electricity.
Program price ($/kWh) $0.16115 $0.18815 $0.00000
Monthly electricity supply charges ($/month)
Your environmental impact after one year of participation in the program will be equivalent to:
Type of impact PowerChoice Standard PowerChoice Green
Receive 100% renewable electricity.
Avoid the equivalent of this many pounds of CO2 after one year of participation
Avoid the equivalent of driving this many fewer miles after one year of participation*
Participants in PowerChoice Standard and PowerChoice Green contribute to the development of new residential solar projects on Nantucket that, to date, are avoiding nearly 2 million lbs of CO2 each year, which is equal to passenger vehicles driving nearly 4.6 million fewer miles each year.

Compare to National Grid's Basic Service price

National Grid’s most recent 12-month average prices: While the program offers a long-term fixed price, National Grid’s Basic Service prices change every 6 months or less. As a result, comparing the program price with the most recent 12-month average of National Grid’s prices can provide a more accurate comparison than comparing with only National Grid’s current price.

Price Information Residential Commercial Industrial
12-month average National Grid price ($/kWh) $0.16279 $0.15031 $0.14635
Monthly electricity supply charges ($/month)

National Grid’s current prices:
Residential and commercial prices are in effect August 1, 2026 – January 31, 2027.
Industrial prices are in effect August 1, 2026 – October 31, 2026.

Price Information Residential Commercial Industrial
Current National Grid price ($/kWh) $0.17185 $0.15568 $0.11024
Monthly electricity supply charges ($/month)

Savings cannot be guaranteed

Please note that there can be no guarantee of savings compared with National Grid’s Basic Service price because future National Grid prices are unknown.

* This equivalency is calculated using information provided by the EPA’s Greenhouse Gas Equivalencies Calculator. Greenhouse gas emissions avoided are calculating using the most recently available NEPOOL GIS emissions factor.