Explore how SUNation Energy is bringing solar energy solutions to your neighborhood through events at select Costello’s Ace Hardware locations. Learn how you can save money, reduce your carbon footprint, and power your home with clean, reliable solar energy.
Meet Long Island’s trusted solar experts and take the first step toward a brighter, greener future.
Get Your Free Estimate!
Learn more about switching to solar with SUNation and say goodbye to expensive electric bills.
You're In Good Hands
#1 Solar System and Battery Storage Provider on Long Island
Since 2003, SUNation Energy has been a leading solar provider on Long Island, serving over 9,000 homeowners and businesses with cutting-edge solar, battery storage, EV chargers, roofing, and more. Our efforts save SUNation customers collectively over $28 million annually while ensuring top-notch service and satisfaction.
Recognized as Best of Long Island for 15 consecutive years, we are dedicated to serving the region. With 140+ employees in our Ronkonkoma solar showroom, we handle design, engineering, permitting, and installation for residential, commercial, and municipal clients.
Why 9,000+ Homeowners Trust SUNation:
- #1 Solar Panel Installer in Long Island Area
- Voted Best of Long Island 15 years in a row
- NYSERDA Platinum Status Installer
- 1,200+ 5 Star Reviews Across the Web
- A+ Rating with the Better Business Bureau®
- Average customer saves approx. $2,500 annually
SUNation has met all of my expectations. Our installation was back in November and we have already made use of our battery backup system. I highly recommend using SUNation!
I am very happy with the results and service they provide. Staff and crew were courteous, knowledgeable and neat. My electric bill are now very minimal per month which is the best.
There is not a better solar company out there. We were very pleased with every aspect of the process. I've recommended over 6 people to them and everyone is equally pleased. A++++
Solar and Battery Storage Systems
At SUNation Energy, we emphasize reliable products for a top-notch solar and battery backup experience. That’s why we offer the Tesla Powerwall, ensuring your home maintains power during outages!
When you add a battery storage system to your solar system, you are not only protecting your home from uncertain events, but you are creating peace of mind.
- Seamlessly switches to battery storage power
- Powers your home for days without electricity
- Automatically returns to grid power once restored
Purchase to Own
Solar Panel Systems, Your Panels, Your Power! Keep your roof's revenue in your hands by owning your solar panel system on Long Island.
Industry Leader
As one of the nation's premier Solar Companies, we have installed over 9,000 solar systems and are a leading choice for solar and battery storage!
Financing Options
SUNation offers various options for solar financing that are tailored to fit your unique project and your individual needs!
You're In Good Hands
Get Paid to Go Solar!
*Financing and loan options for solar, including no money down financing, is contingent upon applicant eligibility as measured by creditworthiness and other qualifying factors. Always be sure to check with your lender for qualifications and offers that fit your household’s unique financial situation.
*Payment will be issued via a $1,000 check from SUNation. This offer is valid for contracts that are signed between 1/1/25 and 1/31/25. SUNation clients are responsible for continued payment of their utility bills each month, and SUNation will send the check after your system is installed.
*Terms and conditions apply – this offer is not to be combined with any other offer or promotion. W-9 is required.
*Battery storage systems are only available to homes and buildings located in PSEG-LI territory
