Solar Panels in Smithtown, NY: Cost, Payback & Savings
A typical 5.2 kW home solar system in Smithtown costs about $20,280 and pays for itself in about 9.1 years, saving roughly $45,090 over 25 years at New York's average electricity price of 29.4¢/kWh.
Monthly solar production in Smithtown
Estimated output of a 5.2 kW south-facing roof system. May is the strongest month (766 kWh); Dec the weakest (332 kWh).
Solar production (kWh) Typical home use, 571 kWh/month
Solar payback calculator for Smithtown
Pre-filled with Smithtown's sunshine and New York'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.
How Smithtown compares
- Each kW of panels here produces about 1,338 kWh a year — about the same as the New York median and 2% less than the US median city (1,371 kWh).
- Payback ranks #102 of 267 New York 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
New York offers net metering: power you send to the grid is credited at or near the retail price, so every solar kWh is valued at 29.4¢ 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.
New York and local utilities may still offer rebates, performance payments, property-tax or sales-tax exemptions. Search the DSIRE incentives database for New York and ask installers which programs they apply for you.
Frequently asked questions
Is solar worth it in Smithtown, NY?
For a typical home, a solar system pays for itself in about 9.1 years and then keeps saving money. Over 25 years the estimated net savings are $45,090. 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 Smithtown, NY?
A home using 571 kWh a month (the New York average) needs about 13 panels of 400 W — a 5.2 kW system — to cover its annual use. Divide your own yearly kWh by 1,338 to get the kW you need.
How much do solar panels cost in Smithtown, NY?
At 3.90 dollars per watt, a 5.2 kW system costs about $20,280 before any state or utility incentives. There is no federal tax credit for systems installed in 2026.
How much sun does Smithtown get?
Smithtown averages 4.7 peak sun hours per day, so each kilowatt of panels produces about 1,338 kWh a year.
Does New York have net metering?
Yes. Power sent back to the grid is credited at or near the retail price (29.4¢ per kWh on average).
How much does electricity cost in New York?
Residential electricity in New York averages 29.4¢ per kWh, and a typical home uses 571 kWh a month (EIA).
Solar payback in nearby places
- Hauppauge9.1 yrs
- Nesconset9.1 yrs
- Saint James9.0 yrs
- Kings Park9.0 yrs
- Ronkonkoma9.1 yrs
- Lake Ronkonkoma9.1 yrs
- Lake Grove9.1 yrs
- Central Islip9.1 yrs