Nantucket Electric serves commercial customers across Nantucket Island. Small-business tariffs typically energy-price around 13.2¢/kWh, with a demand charge that kicks in above 10 kW.
Regulated by the Massachusetts Department of Public Utilities (DPU). Tariff data sourced from URDB and verified against Nantucket Electric’s regulatory filings.
Island utility under National Grid. Higher delivery costs due to cable supply. Nantucket Electric owns the poles, wires, transformers, and meters across Nantucket Island. Whether or not you sign with a competitive supplier, Nantucket Electric still bills the delivery side of your usage every month, and the rate schedule on file with the Massachusetts Department of Public Utilities (DPU) controls how those charges get calculated.
For a small business — defined as roughly under 10 kW of peak demand — the bill stays comparatively simple: a fixed customer charge, an energy charge per kWh, and the usual mix of riders and adjustments. Once you move past that threshold, the demand charge enters the picture, and managing your peak load becomes the largest single lever to cut your bill.
Nantucket Electric also moves commercial customers above roughly 200 kW onto time-of-use schedules. Peak hours in this territory typically run weekday afternoons, with the highest prices during the summer cooling season. If your operation can shift loads into off-peak windows — running heavy equipment at night or on weekends — you can cut the energy-charge portion of your bill noticeably without changing rate class.
Every rate schedule Nantucket Electric files with the Massachusetts Department of Public Utilities (DPU) ends up in URDB. Below are the commercial-sector tariffs we’re tracking, with the energy rate, demand charge (if any), monthly customer charge, and a link to the source filing.
Each step in the chart below is a tariff revision filed with the Massachusetts Department of Public Utilities (DPU). Use it to see how Nantucket Electric’s commercial energy rate has tracked over the last decade — useful context when a supplier quotes you a price.
Most small businesses fall into one of three usage profiles. Match yours below to the tariff family that typically wins. If you’re on the boundary between two, the utility’s default tariff usually applies until you request a switch in writing.
Typical fit: GS-1 / G-1 / small general service. Energy-only billing, no demand charge, fixed monthly customer charge. This is the simplest commercial rate and where most sole-proprietor and storefront businesses land. Compare competitive supplier offers against Nantucket Electric's default service rate before signing anything.
Typical fit: GS-2 / G-2 / medium general service. Demand charges enter the picture here, billed on your single highest 15-minute usage spike during the month. Audit your demand profile (most utilities will provide 15-minute interval data on request) and look for one-time peaks you can flatten — a single 8 PM equipment surge can drive a $200+/month charge.
Typical fit: large general service, GS-3, or primary service — usually with mandatory time-of-use pricing and sometimes a power-factor adjustment. At this size, hiring an energy broker or in-house manager pays for itself; a 1¢/kWh improvement on a million kWh a year is $10,000. Competitive supplier quotes here are usually custom and require submitting your usage history.
Compare every utility’s small-business rate side by side.
Residential plans and Price to Compare for the same territory.
Line-by-line breakdown of every charge — residential framing, but the line-item logic applies to commercial too.
Residential tool, useful for owner-operators benchmarking their home bill in the same Nantucket Electric territory.
Rate data source: Tariff information on this page is compiled from the U.S. Utility Rate Database (URDB), maintained by the National Renewable Energy Laboratory. URDB aggregates publicly filed tariffs from the Massachusetts Department of Public Utilities (DPU) and other state commissions. For source filings, see Nantucket Electric (National Grid) on OpenEI URDB . We sync URDB monthly and verify rate changes against each utility’s regulatory filings. Last updated June 9, 2026.