How Much Solar Would You Need to Run a House on Long Island in 2026?
The average Long Island home will need an 8 kW to 10 kW residential solar system, or roughly 18 to 24 high-efficiency panels. Solar doesn’t take you completely off the grid. Instead, it reduces how much electricity you buy and reduces your PSEG-LI bill in the process.
Learn what might affect the size of your residential solar panel installation and get your free estimate from Power Solutions today.
What Makes 8 kW to 10 kW the Sweet Spot for Long Island Homes?
A range of 8 kW to 10 kW is ideal for most homes on Long Island because it generates significant savings on total consumption of 10,000 kWh to 12,000 kWh per year.
- It produces enough energy to reduce bills for homes with central air conditioning, which is common throughout Suffolk County and Nassau County.
- An 8 kW to 10 kW home solar array is ideal for the average roof. The system would need roughly 350 sq. ft. to 450 sq. ft. of unshaded roof area.
- It maximizes Net Metering credits. Any excess solar produced is sent to the grid, generating credits on the utility account.
- It avoids Utility Interconnection Delays. Systems above 10 kW can face longer approval and interconnection times, with additional utility review steps, grid-coupling fees, and transformer/network infrastructure checks before going live.
- It Optimizes the Payback Period. Long Island’s electricity rates are some of the highest in the nation. A system between 8 kW and 10 kW is ideally sized to provide a return on investment (the payback period with savings equal to purchase cost) within the first ten years. Solar panels last at least 25 years.
Scenarios Where Your Home Might Need More Than 10 kW
To maximize savings, some homes might require more than 10 kW from a residential solar array.
- Charging an electric vehicle frequently requires up to 3.2 kW of additional capacity. This is the biggest change in 2026, with more homeowners switching to plug-in electric vehicles.
- Running a whole-home heat pump for electric heating and cooling year-round requires up to 5.5 kW of additional capacity, depending on the heat pump size.
- Any other significant energy demands, such as an in-ground heated pool, are assessed on a case-by-case basis.
Get a Free Home Solar Estimate from Power Solutions
Although 8 kW to 10 kW is the average for Long Island homes, efficient home solar requires a custom approach. Power Solutions, one of the best-rated and longest-serving solar contractors on Long Island, will review your needs in a free home energy savings assessment. We design custom solar panel systems to maximize savings and optimize the upfront cost. Our solar installers and engineers look at factors like your average energy consumption, the appliances in your home, the orientation of your roof, and the amount of shade that covers your property during the day.
With meticulous planning, we can provide a detailed cost/benefit analysis that outlines the estimated payback period and total savings over the lifetime of your system.
See if solar is right for your home. Get started with a free solar estimate from Power Solutions today.
