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Town-by-town breakdown of solar payback periods across Rhode Island. Compare coastal vs inland towns, real cost data, REG vs net metering returns, and 20-year savings projections.
6.5-7.5 yrs
Payback Range
$0 ITC
25D Expired 2025
$0.29/kWh
RI Energy Rate
How quickly does solar pay for itself in your Rhode Island town? The answer depends on your installation costs, system size, whether you choose REG or net metering, and if you time the REF rebate rounds. With the federal Section 25D residential tax credit expired as of December 31, 2025, payback periods are now 6.5 to 7.5 years across the state — still among the best in New England thanks to RI Energy's high rates ($0.29/kWh) and strong state incentives.
We analyzed 20 Rhode Island towns using 2026 installation costs, RI Energy's current residential rate, the REG program ceiling price (31.55¢/kWh), and REF rebate ($0.65/W, max $5,000). Every town uses the same utility (RI Energy serves ~98% of RI), so the key variables are installation cost, system size, and coastal vs inland location.
No Federal Tax Credit in 2026
The Section 25D residential solar ITC expired December 31, 2025. All payback calculations on this page reflect $0 federal credit. Companies still advertising a "30% tax credit" for homeowner purchases are misleading you.
Inland towns like Coventry, Johnston, and Lincoln have the fastest payback due to lower install costs ($2.78-$2.85/W) without coastal equipment premiums.
Coastal towns carry $0.10-$0.30/W premium for salt-air-rated equipment and reinforced racking. Newport (7.5 years) is the longest payback due to historic district and coastal factors.
Even without the ITC, RI homeowners save $40,000-$57,000+ over 20 years. High electric rates ($0.29/kWh) drive strong savings regardless of town.
Towns where homeowners enroll in REG (31.55¢/kWh fixed) see 6-12 months faster payback vs net metering (80% of $0.29 = $0.232/kWh). REG is especially valuable for smaller systems.
All towns served by Rhode Island Energy at approximately $0.29/kWh. Payback includes REF rebate ($5,000 cap for 8+ kW systems). REG or net metering income calculated separately below.
| Town | System | $/W | Total Cost | After REF | Payback | Annual Savings | 20-Yr Savings |
|---|---|---|---|---|---|---|---|
| Coventry | 9.5 kW | $2.82 | $26,790 | $21,790 | 6.5 yrs | $4,100 | $54,750 |
| Cumberland | 9 kW | $2.85 | $25,650 | $20,650 | 6.7 yrs | $3,870 | $51,060 |
| Johnston | 8.5 kW | $2.82 | $23,970 | $18,970 | 6.7 yrs | $3,620 | $47,800 |
| Lincoln | 9 kW | $2.85 | $25,650 | $20,650 | 6.7 yrs | $3,880 | $51,240 |
| Warwick* | 9 kW | $2.90 | $26,100 | $21,100 | 6.8 yrs | $3,830 | $50,460 |
| Smithfield | 9 kW | $2.85 | $25,650 | $20,650 | 6.8 yrs | $3,860 | $50,920 |
| Woonsocket | 7.5 kW | $2.78 | $20,850 | $15,850 | 6.8 yrs | $3,170 | $41,980 |
| Cranston | 8.5 kW | $2.88 | $24,480 | $19,480 | 6.9 yrs | $3,560 | $46,580 |
| North Kingstown* | 9 kW | $2.92 | $26,280 | $21,280 | 6.9 yrs | $3,850 | $50,340 |
| Pawtucket | 7.5 kW | $2.85 | $21,375 | $16,375 | 7 yrs | $3,090 | $40,380 |
| East Providence* | 8 kW | $2.90 | $23,200 | $18,200 | 7 yrs | $3,340 | $43,520 |
| Barrington* | 10 kW | $3.05 | $30,500 | $25,500 | 7 yrs | $4,380 | $56,560 |
| Bristol* | 8.5 kW | $2.92 | $24,820 | $19,820 | 7 yrs | $3,580 | $46,840 |
| South Kingstown* | 9 kW | $2.95 | $26,550 | $21,550 | 7 yrs | $3,820 | $49,960 |
| Portsmouth* | 9 kW | $2.95 | $26,550 | $21,550 | 7 yrs | $3,830 | $49,960 |
| Middletown* | 8.5 kW | $2.98 | $25,330 | $20,330 | 7.1 yrs | $3,560 | $46,200 |
| Providence | 8 kW | $2.98 | $23,840 | $18,840 | 7.2 yrs | $3,310 | $42,880 |
| Westerly* | 9 kW | $3.00 | $27,000 | $22,000 | 7.2 yrs | $3,730 | $48,340 |
| Narragansett* | 9 kW | $3.08 | $27,720 | $22,720 | 7.3 yrs | $3,770 | $48,160 |
| Newport* | 9 kW | $3.15 | $28,350 | $23,350 | 7.5 yrs | $3,830 | $48,540 |
* Coastal town — salt-air-rated equipment recommended. Adds $0.05-$0.20/W to installation cost.
Coventry
Rural character with large lots and roofs. Fastest payback zone.
6.5 yrs
$54,750 / 20yr
Cumberland
Northern RI suburb. Large homes, excellent roof area.
6.7 yrs
$51,060 / 20yr
Johnston
Suburban community. Lower install costs. Good payback.
6.7 yrs
$47,800 / 20yr
Lincoln
Growing suburb. Large homes with excellent roof exposure.
6.7 yrs
$51,240 / 20yr
Warwick (Coastal)
Largest suburb. Good roof stock. Competitive installer market.
6.8 yrs
$50,460 / 20yr
Smithfield
Bryant University area. Competitive installer pricing.
6.8 yrs
$50,920 / 20yr
Woonsocket
Northernmost RI city. Smaller homes but lowest install costs.
6.8 yrs
$41,980 / 20yr
Cranston
Adjacent to Providence. Strong solar adoption rate.
6.9 yrs
$46,580 / 20yr
North Kingstown (Coastal)
Quonset area. Larger properties with ideal roof exposure.
6.9 yrs
$50,340 / 20yr
Pawtucket
Smaller homes on average. REF rebate covers higher percentage of cost.
7 yrs
$40,380 / 20yr
Rhode Island homeowners must choose between the REG program and net metering. This choice directly affects your payback period. Here is how they compare for a typical 8 kW system:
Estimated payback: 6.5-7.0 years
Estimated payback: 7.0-7.5 years
REG and Net Metering Are Mutually Exclusive
You receive REG payments OR net metering credits, never both at the same time. Any company projecting both simultaneously is inflating your savings. After the 15-year REG term, your system transitions to whatever net metering rate applies at that time.
Average payback: 7.1 years
Average payback: 6.8 years
RI solar installation costs range from $2.78/W (Woonsocket) to $3.15/W (Newport). Inland towns with competitive installer markets and simpler permitting enjoy the lowest costs. Coastal and historic-district towns carry premiums. This single factor creates the 6-12 month spread in payback between the fastest and slowest towns.
Larger systems get better per-watt pricing and generate more annual savings. Barrington averages 10 kW systems (20-year savings: $56,560) while Pawtucket averages 7.5 kW ($40,380). Rural towns like Coventry have larger lots and roof areas that support bigger systems.
REG pays 31.55¢/kWh fixed for 15 years while net metering credits ~$0.232/kWh (80% of retail). For most RI homeowners, REG provides better financial certainty and faster payback. But if you expect rates to rise significantly above 31.55¢/kWh within 15 years, net metering could win long-term.
The $5,000 REF rebate (or $7,000 with battery) directly reduces upfront cost and shortens payback by 12-15 months. Grant rounds open spring, summer, and fall. Missing a round means waiting 3-4 months for the next window. Smart timing can save you months of payback.
Coastal towns from Westerly to Barrington require salt-air-rated panels, marine-grade microinverters, and reinforced racking — adding $0.05-$0.20/W. This equipment lasts longer in corrosive environments and protects your 25-year investment, but it extends payback by 3-6 months.
Get 3+ Quotes
Installation costs vary $0.10-$0.30/W between RI installers. Three quotes on a 9 kW system can save $900-$2,700 on total cost.
Enroll in REG
REG pays $0.0451/kWh more than net metering. On a 9 kW system, that is an extra $487/year — shortening payback by 8-12 months.
Time the REF Round
Apply for REF during the spring round (March-April) to secure the $5,000 rebate before summer installation. Missing a round delays your payback start.
Right-Size Your System
Net metering caps at 125% of annual consumption. Oversizing wastes money. Match your system to actual usage for optimal payback.
Add Battery for ConnectedSolutions
ConnectedSolutions pays $225/kW for summer demand response. A 10 kWh battery earns ~$2,250/year in DR payments, dramatically shortening payback.
Optimize Roof Orientation
South-facing roofs produce 15-20% more than east/west in RI. Full southern exposure can knock 6-12 months off your payback period.
Payback calculations use: 2026 installation costs from installer surveys and market data, RI Energy residential rate ($0.29/kWh), RI average solar production of 1,300 kWh/kW/year, REF rebate of $0.65/W capped at $5,000, REG rate of 31.55¢/kWh for 15-year term, net metering at 80% retail ($0.232/kWh), 7% sales tax exemption applied to total cost, and 2.5% annual utility rate escalation. No federal tax credit is included (Section 25D expired Dec 31, 2025). 20-year savings include projected rate increases.
The average solar payback period across Rhode Island towns ranges from 6.5 to 7.5 years in 2026. RI has among the fastest payback periods in New England thanks to high electric rates ($0.29/kWh from RI Energy), the REG program (31.55¢/kWh for 15 years), and the REF rebate ($0.65/W, max $5,000). These calculations assume $0 federal tax credit, since Section 25D expired December 31, 2025.
Inland towns like Coventry (6.5 years), Johnston (6.7 years), and Lincoln (6.7 years) tend to have lower installation costs per watt ($2.78-$2.85/W vs $2.95-$3.15/W coastal). Coastal towns carry a premium for salt-air-rated equipment, marine-grade hardware, and reinforced racking. However, coastal towns often have slightly higher solar production from ocean-reflected sunlight, which partially offsets the higher cost.
Yes, significantly. The REG (Renewable Energy Growth) program pays 31.55¢/kWh fixed for 15 years for systems under 25 kW. This is higher than the 80% net metering credit (~$0.232/kWh). REG enrollment can shorten payback by 6-12 months compared to net metering alone. However, REG replaces net metering during the 15-year term — you get one or the other, not both simultaneously.
The Rhode Island Renewable Energy Fund (REF) rebate of $0.65/W, capped at $5,000 for residential solar (plus $2,000 for battery), directly reduces your upfront cost. For a typical 8 kW system, REF provides $5,000 off the total cost, shortening payback by approximately 12-15 months. REF is administered by Commerce RI through periodic grant rounds (spring, summer, fall).
Coventry has the fastest solar payback at 6.5 years in 2026, followed by Johnston and Lincoln (both 6.7 years), and Cumberland (6.7 years). These inland communities benefit from lower installation costs ($2.78-$2.85/W), larger average roof areas, and competitive installer pricing without the coastal equipment premium.
No. The Section 25D residential solar investment tax credit expired on December 31, 2025 under the OBBBA. Homeowners purchasing solar with cash or a loan in 2026 receive $0 in federal tax credits. The only remaining federal credit is Section 48/48E for commercial and third-party system owners (PPA/lease providers). All payback calculations on this page reflect $0 federal credit.
Rhode Island offers: REF rebate ($0.65/W, max $5,000 + $2,000 battery), REG program (31.55¢/kWh for 15 years) OR net metering (80% retail), 7% sales tax exemption on solar equipment and labor, 20-year property tax exemption on added home value, and ConnectedSolutions battery demand response ($225/kW summer). Combined, these state incentives can offset 25-30% of total system cost.