Greater Boston · MA
Boston metro & north shore.
Mass Save country. The deepest rebate stack in the area and the densest install corridor we cover. Most weeks, more than half of our installs sit here.
Where
•Boston · Cambridge · Somerville · Newton · Brookline · Quincy · Salem · Beverly · Marblehead · Lowell · Lawrence · Andover · Framingham
Utilities
Eversource East · National Grid · Unitil · municipal lights
Rebate stack
Mass Save · SMART (solar) · Connected Solutions (battery) · MOR-EV
Climate note
Zone 5. Coastal humidity adds to summer cooling load. We size heat pumps to the 17°F design day.
Southern NH
Merrimack Valley & Seacoast.
No state sales tax on residential energy work shifts the upfront math. NHSaves is the rebate vehicle, and the Seacoast adds a strong solar + storage market.
Where
•Nashua · Manchester · Concord · Portsmouth · Dover · Exeter · Hampton · Salem · Derry · Londonderry · Bedford · Merrimack
Utilities
Eversource NH · Unitil NH · NH Electric Co-op · Liberty Utilities
Rebate stack
NHSaves (heat pump) · NH PUC battery pilots · Net-metering (solar)
Climate note
Zone 5 in the south. Snow-load planning included; we don’t pretend February doesn’t exist.
Southern Maine
Portland and south.
The oil-to-heat-pump engine. Maine has the highest residential heating-oil dependence in the country, and Efficiency Maine has built one of the most aggressive heat pump rebate stacks in response.
Where
•Portland · South Portland · Westbrook · Saco · Biddeford · Old Orchard Beach · York · Kittery · Wells · Kennebunk
Utilities
Central Maine Power · Versant Power · Kennebunk Light & Power
Rebate stack
Efficiency Maine (heat pump + battery) · Net Energy Billing (solar) · low-income adders
Climate note
Zone 6. Cold-climate heat pumps essential; we design for the 5°F day along the coast and colder inland.
Vermont
Project-by-project.
Vermont’s utility environment — particularly Green Mountain Power — is one of the most aligned with what we do. We just don’t have a regular cadence here yet, so VT runs as select-project. Reach out and we’ll talk about whether the math works.
Where
•Eastern VT (Connecticut River corridor) · Champlain Valley · select projects across the state
Utilities
Green Mountain Power · Vermont Electric Co-op · Burlington Electric · Washington Electric Co-op
Rebate stack
Efficiency Vermont (heat pump) · GMP Bring Your Own Device (battery) · Tier III renewables credits
Climate note
Zone 6 with pockets of Zone 7. Heat pump runtime calcs get conservative; we plan resistance or wood backup for peak days.