Answer
Rhode Island homeowners should compare at least three quotes from a mix of local and national solar installers, because the 30 percent federal credit ended for property placed in service after 2025. EnergySage lists an average of $2.80 per watt in November 2026. State programs, REG and the REF grant, now decide the payback.
Last updated: November 2026
Rhode Island homeowners pay some of the highest electricity prices on the US mainland. The federal residential credit has ended, so the choice of installer and the timing of state incentives now carry more weight than they did a year ago.
This guide is for Rhode Island homeowners comparing solar installers in RI. It covers local and national options, 2026 cost data, the REG program, net metering, grants, and a vetting checklist. Where a figure comes from a primary source, the source is named. Where it comes from installer guides, the text says so.
In this guide, you will learn:
- Which kinds of solar installers serve Rhode Island and how they differ
- What solar costs in RI after the federal tax credit ended
- How the REG program, REF grants, and net metering work in 2026
- How to compare quotes and vet installers
- Common mistakes Rhode Island homeowners make when going solar
Installer in Rhode Island? Model the roof before you quote
SurgePV supports 3D roof modeling, shading analysis, energy-yield modeling and financial modeling, so each Rhode Island proposal starts from one project file.
Book a DemoChecking cost first? See the SurgePV pricing page
Rhode Island Solar Market Snapshot: 2026
Rhode Island is small but has a mature residential solar market, and its electricity is expensive. The Solar Energy Industries Association (SEIA) Rhode Island page is the standard place to check current state totals for installed capacity, jobs and investment. SEIA updates it each quarter, so read the live page for the latest numbers.
Prices are the stronger reason to look at solar. Per the US Energy Information Administration (EIA) Electric Power Monthly, Table 5.6.A, the average residential price in Rhode Island was 28.18 cents per kWh in August 2026, against 18.16 cents for the US. The EIA labels the 2026 values preliminary.
| Measure | Figure | Source |
|---|---|---|
| Rhode Island average residential price, August 2026 | 28.18 cents/kWh | EIA Electric Power Monthly, Table 5.6.A |
| US average residential price, August 2026 | 18.16 cents/kWh | EIA Electric Power Monthly, Table 5.6.A |
| REG ceiling price, 1 to 15 kW (15 years) | 31.55 cents/kWh | Rhode Island Energy REG tariff, PY2026 |
| REG ceiling price, 15 to 25 kW (20 years) | 28.65 cents/kWh | Rhode Island Energy REG tariff, PY2026 |
- US average residential price18.16 c Aug 2026
- RI average residential price28.18 c Aug 2026
- REG ceiling, 15 to 25 kW28.65 c 20 years
- REG ceiling, 1 to 15 kW31.55 c 15 years
Source: EIA Electric Power Monthly Table 5.6.A (preliminary) and the Rhode Island Energy REG residential tariff for program year April 2026 to March 2027, checked November 2026.
Key Takeaway
Grid power in Rhode Island costs about 10 cents per kWh more than the US average. That gap is why solar can still pay back without the federal credit. The REG ceiling price is a ceiling, so the price on your certificate may be lower.
Rhode Island Energy, formerly part of National Grid, administers interconnection, net metering, and REG. Timelines depend on the installer, the town’s permitting office and the utility’s interconnection queue.
Solar Installers in RI: Local vs National vs Regional
Not every company that advertises in Rhode Island is based there. The installer you choose affects pricing, warranty enforcement, service speed, and how well your system is designed for local conditions.
This section lists examples by type. It is not a ranking and it does not endorse anyone. Company details change, so check each company’s own website for its service area, licenses, and warranty terms.
Local Rhode Island Installers
Local installers are often the first call for homeowners who want responsive service and familiarity with RI programs. They know coastal wind and salt air, Rhode Island Energy interconnection steps, and the deadlines for REF grants and REG enrollment.
| Company | What to verify on its own site |
|---|---|
| Newport Solar | Service towns, in-state install history, warranty terms |
| ISM Solar | Licenses, certifications, REG experience |
| Sol Power Co. | Licenses, certifications, financing options |
| OneGrid | Equipment lines, warranty terms, service area |
| Rooftop Power | States served, roofing and electrical scope |
| NuWatt Energy | Service area, battery and efficiency offerings |
| Newport Renewables | Commercial and institutional scope |
National Installers Active in RI
National installers bring scale, brand recognition, and financing products. Some offer a lease or power purchase agreement rather than a cash or loan purchase.
| Company | Models to ask about | What to verify |
|---|---|---|
| Sunrun | Lease, loan, purchase | Rhode Island service area, escalator terms, who services the system |
| Tesla Energy | Purchase, loan | Quote process, post-install support, warranty terms |
Compare how each company handles service after installation. A low price matters less if you cannot reach anyone about a warranty issue. See lease, loan and cash options explained for how the financing types differ.
Regional Installers Serving Rhode Island
Companies from neighboring states sometimes cross into Rhode Island for larger projects or specific towns. Ask any regional company whether it holds the Rhode Island registration and licenses described below, and who will service the system.
Installer Failures and Exits: Check Who Will Service Your Warranty
Several large residential installers and financiers have restructured or left the market since 2024. Sunnova and SunPower, for example, filed for Chapter 11 bankruptcy. A contract is only as good as the company that honors it for 10 to 25 years.
Before you sign, ask who will handle warranty claims if the installer closes. If a company offers to take over an existing lease from a provider that has exited, read the fine print. Taking over a lease is not the same as getting a new installation from a stable company.
What Solar Costs in Rhode Island in 2026
Pricing in Rhode Island is higher than the national average, but so are avoided utility bills.
Typical Residential Costs
EnergySage’s Rhode Island cost page reports the following as of November 2026.
| Metric | Figure | Source |
|---|---|---|
| Average cost per watt | $2.80/W including installation | EnergySage, November 2026 |
| Average system size | 11.7 kW | EnergySage, November 2026 |
| Total cost before incentives | $32,773 | EnergySage, November 2026 |
| Payback period | 9.59 years | EnergySage, November 2026 |
| 25-year savings | About $105,520 | EnergySage, November 2026 |
EnergySage figures describe marketplace quotes, not a guarantee for your home. The range in your own quotes will reflect roof complexity, equipment, and whether the quote includes a battery.
Reading Payback Honestly
Payback depends on the electricity price you avoid, how much of your solar output you use, and the incentive you choose. With Rhode Island prices near 28 cents per kWh, a well-sized system can pay back in under a decade on EnergySage’s estimate. Ask each installer to show its production assumption and rate escalation, so the numbers can be compared.
Commercial Solar Costs
Commercial pricing per watt is usually lower than residential because of project scale, but it varies widely with roof type, interconnection cost and financing. Ask for quotes with the same assumptions and ask the installer to show the incentives included in the net cost.
Rhode Island Solar Incentives in 2026
The federal incentive landscape changed. Rhode Island still offers state programs that can keep solar attractive.
Federal Tax Credit: The Big Change
The IRS page on the Residential Clean Energy Credit states that the credit is not available for any property placed in service after December 31, 2025. Homeowners who buy a system in 2026 therefore get no federal residential credit.
Leases and power purchase agreements are different. The system owner, not the homeowner, may be able to use commercial tax credits, subject to federal rules on construction start and in-service dates. Ask the provider whether and how any such benefit is reflected in your price, and read the contract for escalators. For background, see what the investment tax credit is.
Renewable Energy Growth (REG) Program
REG is Rhode Island’s production-based incentive for small solar. The Rhode Island Energy residential REG tariff (effective April 1, 2026) sets the terms for program year April 1, 2026 to March 31, 2027.
| Feature | Detail (per the PY2026 tariff) |
|---|---|
| Small-Scale Solar I | 1 to 15 kW, ceiling price 31.55 cents/kWh, 15-year term |
| Small-Scale Solar II | 15 to 25 kW, ceiling price 28.65 cents/kWh, 20-year term |
| Maximum standard DG size | 25 kW DC |
| Payment basis | Fixed per-kWh incentive on measured production |
| Net metering | A project receiving REG payments does not also receive net metering compensation |
The ceiling price is the most the program will pay. The price on your Certificate of Eligibility is the figure that counts.
Worked example (illustrative). Assume a 10 kW system produces 12,000 kWh in a year. At the 31.55 cent ceiling that is 12,000 x $0.3155 = $3,786 per year. The 12,000 kWh is an assumption, not a Rhode Island average. Use your installer’s production estimate and the price on your certificate.
Renewable Energy Fund (REF) Grants
REF grants reduce upfront cost. Commerce RI, the Rhode Island Commerce Corporation, runs the program. Its Small Scale Request for Projects (revised April 6, 2026) lists the current terms.
| Item | Detail (per Commerce RI) |
|---|---|
| Direct-ownership solar PV, starting funding year 2026 | $1.65 per watt |
| Size at which the cap applies | Up to 8.8 kW; larger systems receive the maximum |
| Cap per project | $14,500 |
| Cap per application | $375,000 |
| Storage | The document lists a solar-plus-storage energy storage adder; the amount is not stated there |
| How funds are reserved | First come, first served as project applications are submitted |
Commerce RI says funding levels are subject to change and to available funds. Older pages that cite $0.65 per watt or a $5,000 cap are out of date. Round deadlines are posted on the Commerce RI Renewable Energy Fund page. Because the grant is for systems not yet installed, apply before work starts.
Net Metering
Net metering credits excess solar production against your bill. Installer guides report that systems interconnected after April 2023 receive export credits at about 80 percent of the retail rate and that terms are protected for a number of years. We could not confirm the percentage or the protection period against Rhode Island Energy’s tariff for this update, so treat both as reported, not verified. Read the current tariff with your installer. Read more in our net metering guide and state-by-state net metering overview.
Net metering is simpler than REG for many homes because you use what you make and export the rest. It tends to work best when daytime usage matches solar output.
Other Incentives to Ask About
Ask your installer and the relevant agency whether these apply to your project, and get the terms in writing:
- Sales tax and property tax treatment: Rhode Island has had tax exemptions for solar equipment. Confirm current rules with the Division of Taxation and your city or town.
- Utility battery programs: Rhode Island Energy has run demand-response programs for batteries. Ask for the current program page and payment terms.
- Commercial financing and rural grants: Business owners can ask about C-PACE financing and USDA programs for rural or agricultural projects.
REG vs Net Metering vs REF: Which Should You Choose?
Most Rhode Island homeowners face a choice between REG and net metering for the same system, and REF is a separate upfront grant with its own rules. The PY2026 tariff says a project receiving REG payments does not also receive net metering compensation for the same project.
| Incentive | Type | Best For | Key Tradeoff |
|---|---|---|---|
| REG Program | Fixed per-kWh payment on production | Long-term predictability | Cannot also receive net metering on the same project |
| Net Metering | Bill credit for excess production | Homes whose daytime usage matches solar output | Export credit reported at about 80 percent of retail for newer systems |
| REF Grant | Upfront grant | Lowering initial out-of-pocket cost | Limited funds, first come first served; ask Commerce RI how it interacts with REG |
A home with high evening usage and a battery may prefer net metering. A home that can size the system to annual usage and wants a long fixed payment may prefer REG. A homeowner who needs the lowest upfront cost should apply for the REF grant early.
The right answer depends on your roof, usage pattern, financing method, and risk tolerance. Any installer that pushes one option without modeling the others is selling, not advising. A generation and financial model lets an installer compare them on your usage.
Pro Tip
Ask each installer for the same three-line comparison: yearly kWh produced, yearly value under REG, and yearly value under net metering. Quotes that skip one of the three are hard to compare.
How to Compare Solar Installers in RI
Price per watt is a useful starting point, but it is not the whole story. Here is a practical checklist.
1. Verify Licenses and Registration
Commerce RI’s REF request for projects says Rhode Island law requires anyone in home construction, alterations or repair to be registered with the Rhode Island Contractors’ Registration and Licensing Board. It also asks for a Renewable Energy Professional license or a master electrician license for the work. Ask for registration and license numbers and check them with the state. NABCEP certification is a further signal of technical training; see the NABCEP certification glossary entry.
2. Check Years in Business and Local Track Record
A company with a long Rhode Island record is easier to hold to a labor warranty. Ask how many systems it has installed in your town or county. Local permitting knowledge matters.
3. Read Reviews on Multiple Platforms
EnergySage, Google, the Better Business Bureau, and SolarReviews all carry customer feedback. Look for patterns in recent reviews, not just the overall score. Slow interconnection, roof leaks, and unresponsive service are red flags.
4. Compare Equipment and Warranties
Warranty terms differ by manufacturer and installer, so ask for them in writing.
| Component | What to ask |
|---|---|
| Panels | Product and performance warranty terms from the manufacturer’s datasheet |
| Inverters | String, micro, or power optimizer, and the warranty length |
| Labor | How many years, and who handles claims |
| Roof penetration | Who pays for leak repairs and for how long |
| Production guarantee | What happens if output falls short |
5. Get at Least Three Quotes
Aim for a mix of local and national installers. Make sure each quote uses the same assumed energy usage and financing method. A cash quote and a lease quote are not directly comparable.
6. Ask About Incentive Timing
If you want a REF grant, ask whether the installer will prepare the application before the round opens. If you want REG, ask how they handle enrollment. Missing a deadline can cost thousands of dollars.
7. Review the Contract Carefully
Watch for escalation clauses in leases, prepayment penalties in loans, and vague language about interconnection timelines. A reputable installer will explain every line.
Common Mistakes Rhode Island Homeowners Make
Even careful buyers make these errors.
Waiting for the Federal Tax Credit to Return
The residential credit has ended for property placed in service after 2025. Waiting is a bet on Congress, and Rhode Island’s state programs have their own deadlines. If solar makes sense today with current incentives, delaying rarely helps.
Ignoring the REG and REF Windows
REG and REF both work on enrollment windows and limited funds. If your installer is not ready to apply when a window opens, you may miss the best terms.
Choosing Price Over Service
The cheapest quote is not always the best. A low price from an installer with poor reviews or no local presence can turn into expensive repairs later.
Oversizing the System
REG and net metering both have rules about system size relative to usage or program caps. An oversized system may not earn the credits you expect. REG residential projects are capped at 25 kW DC.
Skipping the Site Assessment
Coastal Rhode Island has salt air, high winds, and older roofs. A remote quote without a site visit can miss shading, structural issues, or electrical upgrades. A proper shading analysis is part of a reliable estimate.
What the Installation Process Looks Like
Most Rhode Island homeowners go through these steps.
- Initial consultation and usage review. The installer looks at your roof, shading, and past electric bills.
- System design and proposal. You receive a layout, production estimate, and financing options.
- Contract and incentive application. You sign and apply for REF, REG, or net metering as appropriate.
- Permitting. The installer submits plans to your city or town.
- Installation. The installer builds the system on site.
- Inspection and interconnection. Rhode Island Energy reviews the system and gives permission to operate.
- Monitoring and maintenance. You track production and report any issues.
Permitting and interconnection are the most variable steps. Ask each installer for its typical timeline in your town.
Should You Add a Battery in Rhode Island?
A battery adds cost, and the federal credit for homeowners is gone. It also offers backup power during outages and may qualify for utility or state programs. The REF document lists an energy storage adder, though it does not state the amount, and Rhode Island Energy has run demand-response programs for batteries.
Ask your installer to model battery economics with and without backup value, and to show the program payments in writing. For design and sizing context, see adding battery storage services and battery arbitrage vs self-consumption.
Compare REG and net metering on one roof
SurgePV’s generation and financial tool lets installers model energy yield and cash flow for a project. Use it to show homeowners the options side by side.
Book a DemoWant plans first? Compare options on the SurgePV pricing page
2026 Policy Risks to Watch
Rhode Island’s solar incentives are not guaranteed forever. REG ceiling prices change each program year, and Commerce RI says REF levels are subject to change. Net metering terms can also change through rulemaking or legislation.
The safest move is to act while current programs are open. Apply for REF grants and REG enrollment as early as the rules allow, and ask your installer which rules apply to your interconnection date. For a state-level overview, see our Rhode Island solar incentives guide.
Further Reading
Neighboring-state programs differ. If you are comparing New England options, read our guides to Massachusetts solar incentives and Connecticut solar incentives.
Conclusion: Three Steps to Choose the Right RI Solar Installer
Rhode Island is still a strong state for residential solar, even after the federal residential credit ended. High electricity prices and state programs keep the economics attractive for many homes.
To move forward:
- Get three quotes from a mix of local and national installers. Compare price per watt, equipment, warranties, and reviews.
- Model your incentives under REG, net metering, and REF to see which structure saves you the most. Do not let an installer choose for you.
- Apply early. REF and REG both work on limited funds and windows. Missing one can erase thousands in savings.
Solar is a 25-year decision. The right installer will still be around to honor it. Installers who want to build the production and savings comparison into every Rhode Island proposal can book a SurgePV demo.
Frequently Asked Questions
Which solar installers operate in Rhode Island?
Local companies such as Newport Solar, ISM Solar, Sol Power Co., OneGrid, Rooftop Power, and NuWatt Energy work in the state, and national companies such as Sunrun and Tesla Energy also serve it. This is a list of examples, not a ranking. Verify each company’s license and service area, and compare at least three quotes.
How much does solar cost in Rhode Island in 2026?
EnergySage reports an average of $2.80 per watt in Rhode Island as of November 2026. For its 11.7 kW average system that is about $32,773 before incentives, with a 9.59-year payback estimate. Your quote will differ with roof complexity, equipment, and whether it includes a battery.
Is the 30% federal solar tax credit still available in Rhode Island in 2026?
No, not for homeowners who buy a system. The IRS states that the Residential Clean Energy Credit is not available for property placed in service after December 31, 2025. Leases and power purchase agreements may still involve commercial credits held by the owner, so ask the provider how it is priced.
What is the RI REG program?
The Renewable Energy Growth (REG) program pays a fixed per-kWh incentive for solar production under a long-term contract with Rhode Island Energy. For program year April 2026 to March 2027, the ceiling price is 31.55 cents per kWh for 1 to 15 kW over 15 years and 28.65 cents for 15 to 25 kW over 20 years. A project that receives REG payments does not also receive net metering compensation.
What is net metering in Rhode Island in 2026?
Net metering credits solar exports against your electric bill under Rhode Island Energy’s tariff. Installer guides report that systems interconnected after April 2023 receive about 80 percent of the retail rate, but that figure was not confirmed against the tariff. Check the current tariff or ask your installer to show it in writing.
Can I get a grant for solar in Rhode Island?
Yes. Commerce RI’s Renewable Energy Fund lists $1.65 per watt for direct-ownership solar PV from funding year 2026, up to 8.8 kW, capped at $14,500 per project. Funds are reserved first come, first served within each round, and levels are subject to change.
Should I choose a local or national solar installer in RI?
Choose on quote quality, licensing, and who services the warranty, not on size alone. Local installers may know Rhode Island permitting and incentive deadlines well, while national companies may offer lease or loan products. Compare at least three quotes built on the same assumptions.
Where this fits
This article is part of SurgePV's Solar Installation hub, which works through the topic from first principles to the decisions a project team actually has to make.
