Solar Incentives in Cambridge, Massachusetts
Start with the federal cutoff below, then check Massachusetts program requirements before relying on an incentive in a proposal.
Use this checklist to ask program administrators about your own project.
Federal Residential Clean Energy Credit: ended for new installations
The federal Residential Clean Energy Credit (Section 25D) ended for installations completed after December 31, 2025. Do not include this homeowner credit in a quote for an installation completed in 2026. IRS: Residential Clean Energy Credit
Under the IRS guidance for Public Law 119-21, completion of the original installation determines when the expenditure is made; paying before the deadline does not qualify an installation completed afterward. Ask your tax adviser about any earlier installation or construction/reconstruction situation. IRS: Section 25D FAQ 7
SMART: confirm your residential application
DOER states that it began accepting SMART 3.0 applications for Program Year 2026 on January 1, 2026. DOER: SMART 3.0 program details
Unverified for your project: current residential intake, available capacity, eligibility, rates, and approval. Ask the Massachusetts Department of Energy Resources: Is my new residential project eligible to apply now, and which rules and capacity allocation apply? Ask DOER about SMART
Massachusetts residential renewable energy income tax credit
Massachusetts DOR describes a state energy credit for qualifying renewable energy spending and directs filers to Schedule EC and Schedule CMS. DOR: residential energy credit
Unverified for your project: current tax-year instructions, qualifying equipment, ownership, residence, and filing eligibility. Ask the Massachusetts Department of Revenue or your tax preparer: Does my solar project qualify, and which Schedule EC instructions apply to my tax year? Check with Massachusetts DOR
Massachusetts solar sales-tax and property-tax exemptions
Unverified: current sales-tax exemption terms for your residential solar equipment. We could not open the state guidance. Ask the Massachusetts Department of Revenue: Does the residential solar sales-tax exemption apply to this equipment and purchase, and what documentation is required? DOR/DOER state guidance to confirm
Unverified: current property-tax exemption eligibility, duration, application, and treatment of your particular system. The full state guidance was unavailable during review. Ask the Cambridge Assessing Department and Massachusetts DOR: Does my proposed system qualify for a property-tax exemption, and what must I file? DOR: solar abatement guidance to confirm
Mass Save incentives and the HEAT Loan
Mass Save describes the HEAT Loan as financing for eligible energy-efficiency improvements. Mass Save: HEAT Loan
In its Solar FAQ, Mass Save says that for a combined solar-panel and residential-battery project, only battery storage is eligible for Mass Save financing. This guidance concerns Mass Save, including the HEAT Loan discussed here; it does not describe other lenders or guarantee approval for a battery. Ask Mass Save and the participating lender to confirm your proposed equipment and loan. Mass Save: solar financing FAQ
Unverified for your home: rebate eligibility, eligible battery equipment, enrollment requirements, and lender approval. Ask Mass Save and a participating lender: Which measures in my itemized proposal qualify, what approvals are needed, and which rebates can be combined? Confirm eligibility with Mass Save
MassCEC programs: check current availability
MassCEC reports that the Mass Solar Loan program closed to new applications in December 2020. Do not count that old program as an available loan offer. MassCEC: Mass Solar Loan
Unverified: any currently open MassCEC household grant or replacement financing program for your project. Ask MassCEC: Which current programs accept individual Cambridge homeowners, and what are their application dates and eligibility rules? Ask MassCEC
Massachusetts net metering and your utility
Massachusetts net metering is covered by Department of Public Utilities regulations, including 220 CMR 18.00. DPU: net metering laws and regulations
Unverified for your address: serving utility, current tariff, export-credit calculation, cap status, remaining bill charges, and interconnection approval. Check the utility named on your bill and ask its distributed-generation team and DPU: Which net metering rules apply to my address and proposed system, and what charges remain? Confirm with DPU and your bill's utility
Questions to ask before choosing financing
Purchase or loan
Ask the seller and lender for an itemized price without assumed incentives, the payment terms, and who is responsible for applications.
Lease or power purchase agreement
Ask the provider who owns the equipment, who receives each incentive, and what happens if you sell your home.
Battery add-on
Ask Mass Save to review the solar and battery line items separately. Request written eligibility confirmation before relying on financing.
Build a project record
Keep your proposal, signed contract, invoices, equipment specifications, completion records, and correspondence with your utility and program administrators. Ask your tax preparer which records to retain for your filing.
Massachusetts solar incentive questions
Can a solar installation completed in 2026 receive the federal residential credit?+
No. The federal Residential Clean Energy Credit ended for installations completed after December 31, 2025. Ask your tax preparer about any earlier installation or carryforward rather than assuming a new 2026 installation qualifies. IRS: federal credit cutoff
Is SMART open to my new residential project?+
DOER states that Program Year 2026 applications began on January 1, 2026. Eligibility and current capacity for your residential project are unverified here. Ask DOER whether your proposed system can apply now before including SMART payments in a quote. DOER: SMART 3.0
Does a Massachusetts homeowner automatically qualify for state tax benefits?+
Eligibility is unverified for your home. Ask Massachusetts DOR or your tax preparer about Schedule EC and the residential sales-tax exemption; ask your local assessor about the property-tax exemption. Request confirmation for your ownership arrangement, equipment, and tax year. DOR: state credit guidance
Can I finance my solar panels through the Mass Save HEAT Loan?+
Mass Save's Solar FAQ says that for a combined solar-panel and residential-battery project, only battery storage is eligible for Mass Save financing. This is guidance about Mass Save, including the HEAT Loan, not other lenders. Ask Mass Save and the participating lender to confirm your equipment and application requirements; battery financing is not guaranteed. Mass Save: solar financing FAQ
Will net metering eliminate every charge on my electric bill?+
Do not assume a zero bill. The tariff and remaining charges for your address are unverified here. Ask the utility named on your bill for a written explanation of export credits and charges, and consult Massachusetts DPU about the applicable net metering rules. DPU: net metering rules
Ready to See How Incentives Affect Real Quotes?
Ask for proposals that separate verified eligibility from assumptions and show the project without uncertain incentives.