CMP (Central Maine Power) solar export rate
What CMP (Central Maine Power) pays for power exported from rooftop solar in Maine, with the source and the date it was checked.
No single rate — formula based
No single CMP-wide export rate: kWh Credit participants receive kWh credits, while non-residential Tariff Rate participants receive PUC-established dollar credits based on the applicable tariff rate and facility output.
CMP (Central Maine Power) · Maine
CMP requires Chapter 313 NEB and Chapter 324 interconnection applications; the cited MPUC page describes the PUC-established tariff-rate program.
Source: maine.gov
Full CMP (Central Maine Power) detail →Maine rules that apply to CMP (Central Maine Power)
The state framework sets the default. Where CMP (Central Maine Power) pays something different, the utility tariff governs and is what the card above reports.
| Compensation mechanism | Maine has two NEB variants: a kWh Credit Program that credits participating bills in kilowatt-hours, and a Tariff Rate Program for non-residential customers that provides dollar bill credits based on the PUC-set tariff rate and facility output. |
|---|---|
| Export rate | There is no single statewide export price. The kWh Credit Program provides kWh credits rather than a fixed dollar rate; the Tariff Rate Program uses annually established, project- and customer-specific tariff rates published by the PUC. |
| Rate effective | Tariff rates are established for 12-month periods beginning January 1 and ending December 31; the PUC page states its current rate schedule was established on December 17, 2025 for periods through 2046. |
| Credit rollover | Yes. Unused kWh or dollar credits may be accumulated and applied on a rolling 12-month basis. |
| Credit expiration | Unused kWh or dollar credits are eliminated at the end of the applicable 12-month period, with no compensation for the unused credits. |
| Annual true-up | No separate annual true-up date is specified in the reviewed sources; credits are handled on a rolling 12-month basis and expire at the end of that period. |
| Aggregate program cap | No statewide aggregate percentage cap is stated in the cited statutes or MPUC NEB page. Section 3209-A states a 750 MW development goal; that is a goal, not described as an aggregate program cap. |
| Program status | The 2025 law bars the Commission after December 31, 2025 from allowing new NEB agreements for resources interconnected or planned on the utility side of a customer meter; existing agreements and behind-the-meter arrangements are governed by the applicable statutes and rules. |
| Grandfathering | Yes, in limited statutory/program respects: the commercial and institutional collocation/100%-subscription limitation does not apply to a NEB agreement executed on or before December 31, 2023, and statutory applicability provisions preserve the significance of earlier agreements and milestones. |
| Regulator | Maine Public Utilities Commission (MPUC). The CMP and Versant tariff agreements identify the Commission as the state regulatory agency with jurisdiction over public utilities. |
| Governing rule | 35-A M.R.S. §§ 3209-A and 3209-B, implemented through the Maine Public Utilities Commission Chapter 313 Net Energy Billing rule. |
| Pending change | No separate pending change was identified in the reviewed sources as of September 16, 2026. The material 2025 changes are enacted law: after December 31, 2025, new utility-side-of-meter NEB agreements are barred under §§ 3209-A(10)-(11) and 3209-B(9). |
Other Maine utilities
- Versant PowerFormula basedNo single Versant-wide export rate: kWh Credit participants receive kWh credits, while non-resi