Maine & New England (NEPOOL-GIS) SREC Market Guide: Maine Class I / Class IA REC & New England NEPOOL-GIS Regional Market (ME, NH, VT, CT, RI)
How homeowners in Maine, New Hampshire, Connecticut, and Rhode Island monetize their rooftop solar production across the 6-state New England NEPOOL-GIS Class I Renewable Energy Certificate market while keeping 100% of their CMP/Versant/Eversource net metering credits.
1. How the Maine & New England (NEPOOL-GIS) SREC Market & Registration Process Works
Mechanic 1 — The 6-State New England NEPOOL-GIS Cross-Border Advantage: Because Maine, New Hampshire, Vermont, Massachusetts, Connecticut, and Rhode Island share the unified ISO-New England grid and NEPOOL-GIS tracking registry, a certified rooftop solar array in Maine (Central Maine Power or Versant Power) or New Hampshire can mint Class I RECs and sell them directly into the highest-paying New England state compliance markets for $34 to $44 per MWh!
Mechanic 2 — Keeping 100% of Maine Net Energy Billing (NEB) kWh Credits PLUS Selling Class I RECs: Under Maine Public Utilities Commission (MPUC) Chapter 313 Net Energy Billing rules, residential rooftop owners keep 100% of the environmental attributes (RECs) of their behind-the-meter array! You get full 1:1 kWh Net Energy Billing credits against high CMP/Versant rates (~$0.26–$0.29/kWh) AND collect an extra $420–$540/year in cash from NEPOOL-GIS REC sales.
Mechanic 3 — Revenue-Grade Meter & Independent Verifier (Knollwood Energy / SRECTrade) Requirements: To mint tradable Class I RECs on NEPOOL-GIS, New England state utility commissions require that your kWh generation be reported by an approved Independent Verifier reading an ANSI C12.20 revenue-grade meter (standard inside Enphase IQ Combiners, SolarEdge Energy Hub inverters, and Tesla Gateways).
Mechanic 4 — Pairing Maine & New England Solar With Heat Pumps ($4,000–$8,000 Efficiency Maine Rebates!): Because 60%+ of Maine and New Hampshire homes heat with expensive #2 heating oil or propane, sizing your solar array 4kW larger and claiming Efficiency Maine’s $4,000–$8,000 cold-climate heat pump rebates eliminates both your electric bill AND your winter heating oil bill!
2. 10-Year SREC Cash Earnings & Incentive Stack Worksheet
Model Your System Payback →MAINE & NEW ENGLAND (CMP / VERSANT / EVERSOURCE) 10KW SOLAR 10-YEAR RETURN =================================================================================== Revenue / Savings Stream Annual Value 10-Year Cumulative ----------------------------------------------------------------------------------- 1. CMP / Versant / Eversource 1:1 Net Billing $3,120 / Year $34,800 Bill Savings 2. NEPOOL-GIS Class I REC Cash Sales (12 MWh) $468 / Year $4,680 Cash Deposits 3. Cold-Climate Heat Pump Oil Displacement $1,800 / Year $18,000 Heating Saved ----------------------------------------------------------------------------------- TOTAL 10-YEAR NEW ENGLAND SOLAR + HEAT PUMP VALUE (Plus 30% ITC): $57,480+ Total Return!
Maine & New England (NEPOOL-GIS) SREC Trading & Tax FAQ
If I live in Connecticut (Eversource / UI), should I enroll in the RRES "Buy-All" or "Netting" tariff?
In 95% of residential cases in Connecticut, choose the RRES "Netting" tariff (which works like 1:1 net metering with a monetary credit rollover plus Energy Storage Solutions VPP battery rebates of up to $7,500 upfront) rather than the "Buy-All" tariff.
Can New Hampshire homeowners sell both NH Class III (Solar) RECs and MA Class I RECs?
Yes—a New Hampshire solar array registered with both the NH Department of Energy and MA DOER can sell into whichever New England NEPOOL-GIS market (NH Class I/II or MA/CT Class I) offers the highest spot price each quarter!
Are residential solar systems exempt from property tax in Maine, New Hampshire, and Vermont?
Yes—Maine enacted a 100% statewide Residential Renewable Energy Equipment Property Tax Exemption (36 M.R.S. § 656(1)(K)), Vermont exempts residential systems ≤50kW from state education property tax, and New Hampshire cities/towns adopt RSA 72:62 100% solar property tax exemptions.