Solar in Rhode Island costs about $2.87 per watt, so the typical 7.91 kW system runs about $22,702 before incentives. The price is ordinary, but power here costs 29.44¢ per kWh on average across the state. On Rhode Island Energy net metering, the typical system pays for itself in about 8.3 years before incentives in our example, with no federal credit at all. Power left over after your own use each month earns the net metering credit, a little below the price you pay.
See what solar would save on your Rhode Island home
29.44¢ a kilowatt-hour: the Rhode Island number that carries the case
Rhode Island pays some of the highest electricity prices in America. That one fact does most of the work in the state’s solar math. Every kilowatt-hour your panels make replaces power priced like a luxury good.
With one utility serving nearly every home, there is no shopping your way out of the rate. When the unit price is the problem, making your own units is the direct answer. For the national picture, see our cost comparisons for all 50 states.
An ordinary price against an extraordinary rate: the 7.91 kW Rhode Island payback
The typical system at the September 2026 Edition price, on Rhode Island Energy net metering, with no federal residential credit anywhere in the math.
Typical 7.91 kW system at $2.87 per watt
The case never rested on subsidies, so losing them barely dents it. It rests on the rate. Power left over after your own use each month earns the net metering credit, which is a little below the price you pay.
29.44¢ is statewide price context, not your filed rateOur savings use Rhode Island Energy’s average home price for the 12 months to August 2026 with its $11.25 monthly fixed charges taken out (27.2¢), netted month by month against an average home’s use (about 6,565 kWh a year). Power left over each month earns the net metering credit. We use September’s credit for April to September (21.650¢) and October’s for October to March (27.553¢). Fixed charges stay on your bill, and no upkeep, rate changes or panel aging are counted. Rerun the numbers with your own bills.
Up to 100% of your use or past it: the line in Rhode Island’s netting law
Rhode Island General Laws chapter 39-26.4 sets net metering in bands, keyed to your own use. What your production is worth depends on which band it lands in.
Production up to 100% of your use
The strong band. Every kWh offsets supply, distribution, transmission and transition charges.
Production above 100% of your use
For a single-meter home system of 25 kW or less like this one, power left over each month currently earns the net metering credit, and the yearly excess-generation reconciliation does not apply. Rhode Island Energy says it will post a new value for excess power under a 2025 state law. Check current terms before you oversize.
Size to your own useThe statute rewards systems sized to the first band. The typical 7.91 kW system, the median size Rhode Island homeowners installed in 2025, makes about 10,625 kWh a year. That is more than the average home’s 6,565 kWh of use, so check your own bills before you match it.
The 20% cut does not touch rooftop systemsInstaller marketing keeps getting this wrong. The 20% credit reduction added in 2023 applies only to ground-mounted remote net-metering projects. Behind-the-meter rooftop systems are expressly exempt under section 39-26.4-3, and new home rooftop solar still gets the full credit.
What $2.87 a watt buys on a Rhode Island roof, 3 kW to 7.91 kW
The typical system here, 7.91 kW, is close to the 7.95 kW US median. Gross cost by size, before incentives:
Gross cost at $2.87 per watt, before incentives. Size to your yearly use, not your roof: power left over each month earns only the net metering credit, below the price you pay.
See what solar would save on your Rhode Island bill
At 29.44¢ a kWh, the rate on your own bill decides the savings. Companies that serve your ZIP quote the final number.
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Net metering or a fixed REG price: the second Rhode Island path
Rhode Island’s Renewable Energy Growth program pays participating small systems (up to 25 kW) a fixed price for their production, instead of net metering credits. Ask every installer about it.
Net metering
Credits move with the retail rate. After years of 5.95% yearly growth, net metering wins if rates keep climbing.
Renewable Energy Growth (REG)
A locked price per kWh: 15 years on systems up to 15 kW, 20 years on larger ones. REG wins if you value a known number.
Price both paths on your own usageEnrollment windows and tariff terms are set each year. Have your installer show both options priced against your actual use before you choose.
The law can change the rulesRhode Island sets its net metering rules by statute, and the General Assembly can change them. One more reason to get current terms in writing, dated.
Four Rhode Island roofs and pitches where even 29.44¢ cannot rescue the deal
The high rate forgives a lot, but not everything. Hold off if one of these fits:
- A shaded, compact roof. Small systems leave no room for underperformance. An array losing a quarter of its output to shade pays back far more slowly.
- A heat pump or an EV within 2 years. Size for the future load now, or you will be buying expensive grid power anyway. Sizing for today’s 6,565 kWh and doubling use next year wastes the strong band.
- A roof due for replacement. Even an 8.3-year payback argues for reroofing first when fewer than 10 years of roof life remain.
- A pitch built on overproduction. Power left over each month earns only the net metering credit, below the price you pay, and rhode Island Energy says it will post a new value for excess power under a 2025 state law. A quote sized far beyond your bill bets on terms that may change.
See what solar would save on your bill
The rate on your bill is the whole argument, so start from it. Enter your ZIP code to get quotes, then check each one against what you actually pay.
- Quotes built for your roofEach quote is designed around your home and your bills.
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Rhode Island solar, beyond the rate
Frequently asked questions
How much do solar panels cost in Rhode Island in 2026?
About $2.87 per watt installed (EcoGen Solar Cost Index, September 2026 Edition). The typical 7.91 kW system, the median size Rhode Island homeowners installed in 2025, runs about $22,700 before incentives.
Why is solar payback so fast in Rhode Island?
Because power here is expensive: 29.44¢ per kWh on average across the state, one of the highest rates in the country. In our example the typical 7.91 kW system pays for itself in about 8.3 years before incentives on Rhode Island Energy net metering, without any federal credit.
Does Rhode Island still have full net metering?
Yes, for home systems. Each month the power your panels send out is netted against the power you buy, so it offsets the full per-kWh price. For a single-meter home system of 25 kW or less like this one, power left over each month currently earns the net metering credit, and the yearly excess-generation reconciliation does not apply. Rhode Island Energy says it will post a new value for excess power under a 2025 state law.
Did Rhode Island cut net metering credits by 20%?
Only for ground-mounted remote net-metering projects. Behind-the-meter rooftop systems are expressly exempt from the 2023 reduction, and new residential rooftop solar still earns the full unreduced credit.
What is the Renewable Energy Growth program?
A state program that pays small systems a fixed price per kilowatt-hour for 15 or 20 years, by system size, instead of net metering credits. It trades upside from rising rates for two decades of certainty; have an installer price both paths against your actual usage.
How we calculate these costs
Cost figures use Rhode Island’s entry in the EcoGen Solar Cost Index (September 2026 Edition), $2.87 per watt as of September 25, 2026, 0.7% below the $2.89 national figure and tied 25th lowest of 51. The 7.91 kW typical size is Berkeley Lab’s 2025 median for Rhode Island single-family installs (2,480 systems). The payback divides the $22,702 cost by about $2,730 in year-one savings on Rhode Island Energy net metering: the utility’s EIA average home price for the 12 months to August 2026 less fixed charges, netted month by month against average use, with power left over each month at the net metering credit (September’s credit for April to September, October’s for October to March). No federal residential credit for host-owned systems and no upkeep are counted.
Sources (9)
- Rhode Island General Assembly, Rhode Island General Laws Chapter 39-26.4 (net metering statute, netting bands and rooftop exemption): webserver.rilegislature.gov
- Rhode Island Office of Energy Resources (OER), Solar Program and Licensing Pages: energy.ri.gov
- U.S. EIA, Electric Power Monthly, residential price by state, 12-month average September 2025 to August 2026: eia.gov
- U.S. EIA, Form EIA-861 Annual Electric Power Industry Report, 2024 (Narragansett Electric, operating as Rhode Island Energy): eia.gov
- U.S. EIA, Form EIA-861M, sales to ultimate customers, September 2025 to August 2026 (Narragansett Electric): eia.gov
- Rhode Island Energy, net metering credit by rate class (Addendum to R.I.P.U.C. Tariff No. 2095), September and October 2026: rienergy.com
- U.S. Census Bureau, American Community Survey, 2024: census.gov
- IRS, One, Big, Beautiful Bill Provisions (Public Law 119-21, Section 25D): irs.gov
- DSIRE, Third-Party Solar PV Power Purchase Agreement Policies (May 2026): ncsolarcen-prod.s3.amazonaws.com
