State solar guide
Rhode Island has strong solar fundamentals in 2026. The federal residential credit expired December 31, 2025, but state incentives and net-metering rules still support solid payback timelines for qualified homeowners.
Sources: ElectricChoice June 2026 | NREL PVWatts (verify at your assessment) | EnergySage mid-2026 | Federal residential credit: Section 25D expired December 31, 2025, H.R.1 (One Big Beautiful Bill Act).
Net metering
Rhode Island net metering, administered by Rhode Island Energy (the sole investor-owned utility), credits excess solar exports at approximately 80% of the retail rate for systems approved after April 2023, equating to approximately $0.232 per kWh in 2026. Net metering credits are protected by state law through 2039. Homeowners must choose between two mutually exclusive programs: the Renewable Energy Growth (REG) track, which pays $0.2723 per kWh on all production for 15 years and replaces net metering, or the Renewable Energy Fund (REF) rebate track, which preserves standard 80% retail net metering and adds an upfront cash rebate. REG typically provides superior long-term financial returns for most homeowners. As of 2026-06, verify current program availability at energy.ri.gov or with your utility.
Rhode Island Energy is the only investor-owned electric utility serving residential customers in Rhode Island. REG participants receive $0.2723 per kWh on all production for 15 years instead of net metering, REG and REF+net metering are mutually exclusive tracks. Customers must choose one program.
Program: NM1_partial. Last verified: June 1, 2026. DSIRE source (opens in new tab).
Verify with your utility
Net-metering rules change by utility and program cycle. Confirm current export credit rates and eligibility with your specific Rhode Island utility before contracting. Current program details at DSIRE (opens in new tab).
State incentive stack
The federal residential credit expired December 31, 2025. The programs below are what remains for Rhode Island homeowners. Amounts and availability change; every program is date-stamped and linked to its DSIRE source.
Federal residential solar credit (Section 25D): expired. The Section 25D residential investment tax credit expired December 31, 2025. The residential credit rate is 0%. State and local incentives below may still significantly reduce your net system cost. Commercial systems still qualify for Section 48E (30%).
| Program | Benefit | Eligibility | Status | Source |
|---|---|---|---|---|
| Renewable Energy Growth (REG) Program Production incentive (15-year fixed payment) REG program blocks open periodically and may have waitlists. Verify current block availability before committing to the REG track. REG replaces net metering, homeowners on REG do not receive separate net metering credits. | $0.2723 per kWh on all production for 15 years (residential rate) Fixed payment of $0.2723 per kWh (residential rate) on all solar production for 15 years. Replaces net metering for participants, cannot stack with REF rebate or standard net metering. Payments made by Rhode Island Energy. An 8 kW system producing 9,600 kWh per year earns approximately $2,614 per year ($39,210 total over 15 years). REG is typically the financially superior choice for most Rhode Island homeowners vs. REF+net metering. | Rhode Island residential customers of Rhode Island Energy. System must be enrolled in REG through the utility. Cannot simultaneously participate in REF rebate or standard net metering, choose one track. | Active | DSIRE (opens in new tab) |
| Renewable Energy Fund (REF) Rebate Upfront rebate REF availability is capacity-limited. Verify current program funding and availability before relying on this rebate. REF recipients use standard net metering (80% retail for post-April 2023 installs), not REG. | $0.65 per watt, maximum $5,000; plus $2,000 battery storage adder (max $7,000 combined) Upfront per-watt rebate of $0.65 per watt for residential solar, capped at $5,000. Battery storage adder of $2,000 for paired battery systems. Maximum combined REF rebate: $7,000. Available only for net-metered systems, cannot be combined with REG program participation. Administered by the Rhode Island Office of Energy Resources. | Rhode Island residential customers of Rhode Island Energy with net-metered systems. Cannot combine with REG program. Battery adder requires battery paired with solar at time of installation. | Active | DSIRE (opens in new tab) |
| ConnectedSolutions Battery Demand Response (Rhode Island Energy) Battery storage incentive (annual performance payment) Annual performance payments vary based on actual demand reductions during events. Confirm your battery model qualifies before including this income in payback calculations. | $225 per average kW performed per summer season Demand response program for battery storage: $225 per kW per summer season for demand reductions during events (June to September, 3 PM to 8 PM, maximum 60 events). Available to both REG and net-metered customers. Annual enrollment through Rhode Island Energy. | Rhode Island Energy residential customers with a qualifying battery storage system, regardless of whether on REG or net metering track. Annual enrollment required. | Active | DSIRE (opens in new tab) |
| Rhode Island Property Tax Exemption (Solar) Property tax exemption Confirm exemption is properly applied with the local tax assessor after installation. | Full assessed value increase excluded for 20 years 20-year statewide exemption on solar-added assessed value. No local opt-out, applies to all Rhode Island residential properties. Prevents solar from increasing the property tax bill for 20 years. | Rhode Island residential property with a qualifying solar energy system. | Active | DSIRE (opens in new tab) |
| Rhode Island Sales Tax Exemption on Solar Equipment Sales tax exemption Confirm exemption is applied by your installer at the time of purchase. | Full exemption from 7% state sales tax (includes battery storage) Full exemption from Rhode Island's 7% state sales tax on residential solar energy equipment, installation labor, and battery storage systems. | Residential solar energy equipment and battery storage purchased and installed in Rhode Island. | Active | DSIRE (opens in new tab) |
Data last verified June 1, 2026. Incentive programs change; verify current amounts and availability at dsireusa.org (opens in new tab) before committing to a project.
Battery storage incentives in Rhode Island
REF battery storage adder: $2,000 upfront for battery storage paired with REF-qualifying solar (must be net-metered, not REG). ConnectedSolutions (Rhode Island Energy): $225 per kW per summer season for battery demand response, June-September, 3 PM-8 PM events, maximum 60 events per summer, available for REG and net-metered customers alike. Sales tax exemption covers battery storage purchases.
Savings example
This example uses real Rhode Island market data. No federal residential credit is applied. Figures are illustrative; your in-home assessment uses your actual utility bills and the current rate schedule for your specific utility.
Annual production estimated at 9,600 kWh based on 4.0 peak sun hours in Rhode Island. REG income of $2,614 per year for 15 years is the primary value driver, replacing net metering. Rate escalation applies only to avoided retail purchases on the REG track (REG rate is fixed at $0.2723 per kWh for 15 years, not indexed to inflation). System price at $2.91 per watt market average. Federal residential credit: $0 (expired). REF+net metering track would yield different payback with $5,000 upfront rebate and 80% retail net metering, confirm which track is financially optimal for your situation with your installer.
Rhode Island homeowner savings example, REG program track (illustrative)
Illustrative example. Federal residential credit: $0 (Section 25D expired December 31, 2025). Your estimate will use your actual utility bills and current rate schedule.
Permitting
Rhode Island solar permitting is managed at the municipal level. No statewide permit fee cap as of 2026. Permit timelines vary: Providence and larger cities average 3 to 6 weeks; suburban communities average 2 to 4 weeks. Rhode Island Energy interconnection review adds 4 to 8 weeks after permit issuance. SolarAPP+ automated permit approval has limited adoption in Rhode Island as of 2026. REG program registration through the Rhode Island Public Utilities Commission (PUC) requires additional administrative steps after installation. Contract to energization typically runs 10 to 16 weeks. Rhode Island is a small state with a single major utility, which streamlines the interconnection process relative to multi-utility states.
REG program enrollment and REF rebate claims require coordination with Rhode Island Energy and the state PUC. Confirm which program track (REF+net metering or REG) your installer recommends before signing, the financial outcome differs meaningfully.
Commercial solar in Rhode Island
The commercial solar credit (Section 48E, 30 percent) remains available for qualifying commercial projects. Construction must begin by July 4, 2026 to qualify for the full placed-in-service window. Combined with MACRS accelerated depreciation and 100 percent first-year bonus depreciation, the combined first-year federal benefit can reach 45 to 55 percent of project cost for many Rhode Island business owners. Direct Pay is also available for nonprofits, municipalities, and other tax-exempt entities.
Commercial solar overviewCommercial solar projects must begin construction by July 4, 2026 to qualify for the 30 percent Section 48E federal tax credit. After that date, the system must be placed in service by December 31, 2027.
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