Solar Panels in Westerly, RI: Cost, Payback & Savings

A typical 5.2 kW home solar system in Westerly costs about $18,200 and pays for itself in about 8.5 years, saving roughly $45,697 over 25 years at Rhode Island's average electricity price of 29.2¢/kWh.

Strong investmentpayback 8.5 years

System size

5.2 kW

13 × 400 W panels

Upfront cost

$18,200

at Rhode Island median $3.50/W

First-year savings

$1,998

about $167/month

25-year net savings

$45,697

after paying for the system

Production

6,838 kWh/yr

100% of a typical home's use

Peak sun hours

4.7/day

1,315 kWh per kW per year

Monthly solar production in Westerly

Estimated output of a 5.2 kW south-facing roof system. Jul is the strongest month (738 kWh); Dec the weakest (357 kWh).

Solar production (kWh) Typical home use, 567 kWh/month

Solar payback calculator for Westerly

Pre-filled with Westerly's sunshine and Rhode Island's average electricity price. Enter your own bill and an installer's price per watt to see your payback.

Leave export credit blank where the utility offers full net metering. Where exports earn less, solar used at home as it's produced is worth the full price and the rest earns the export credit.

System

Cost

Year-1 savings

Payback

25-yr net savings

How Westerly compares

Each kW of panels here produces about 1,315 kWh a year — about the same as the Rhode Island median and 4% less than the US median city (1,371 kWh).
Payback ranks #12 of 29 Rhode Island places we cover.
Sunshine varies little across a state; electricity price, installed cost and how utilities credit exported power drive most of the difference between states.

Net metering, tax credits and incentives in 2026

Rhode Island offers net metering: power you send to the grid is credited at or near the retail price, so every solar kWh is valued at 29.2¢ here.

There is no federal tax credit for buying home solar installed in 2026. The 30% Residential Clean Energy Credit (Section 25D) ended for systems placed in service after December 31, 2025, so the costs and paybacks on this page include no federal credit.

Rhode Island and local utilities may still offer rebates, performance payments, property-tax or sales-tax exemptions. Search the DSIRE incentives database for Rhode Island and ask installers which programs they apply for you.

Frequently asked questions

Is solar worth it in Westerly, RI?

For a typical home, a solar system pays for itself in about 8.5 years and then keeps saving money. Over 25 years the estimated net savings are $45,697. Verdict: strong investment. Your own payback depends on your roof, your bill and the quotes you get.

How many solar panels do I need in Westerly, RI?

A home using 567 kWh a month (the Rhode Island average) needs about 13 panels of 400 W — a 5.2 kW system — to cover its annual use. Divide your own yearly kWh by 1,315 to get the kW you need.

How much do solar panels cost in Westerly, RI?

At 3.50 dollars per watt, a 5.2 kW system costs about $18,200 before any state or utility incentives. There is no federal tax credit for systems installed in 2026.

How much sun does Westerly get?

Westerly averages 4.7 peak sun hours per day, so each kilowatt of panels produces about 1,315 kWh a year.

Does Rhode Island have net metering?

Yes. Power sent back to the grid is credited at or near the retail price (29.2¢ per kWh on average).

How much does electricity cost in Rhode Island?

Residential electricity in Rhode Island averages 29.2¢ per kWh, and a typical home uses 567 kWh a month (EIA).