SUNation Energy

SUNation Energy has been a defining presence in Long Island's solar industry since its founding in 2003. Headquartered at 171 Remington Boulevard in Ronkonkoma, the company has grown from a small regional installer into one of the most recognized solar brands in the New York metropolitan area, with over 9,000 completed installations and a workforce of approximately 140 employees serving Long Island, Queens, Brooklyn, Staten Island, and more recently the Tampa and Central Florida markets.

The company's 23-year track record in one of the country's most complex solar markets deserves particular attention. New York's combination of aggressive state incentives through NYSERDA, dense suburban roof configurations, strict municipal permitting, and Long Island Power Authority interconnection requirements creates a regulatory environment that overwhelms many installers. SUNation has navigated that landscape longer than almost any other company on the island, and their institutional knowledge of local building departments, utility processes, and incentive stacking is a genuine competitive advantage.

SUNation's 4.7-star Google rating across 933 reviews reflects strong and consistent customer satisfaction at significant scale. The company has been voted Best of Long Island Solar Business for fifteen consecutive years, which speaks to both their market penetration and sustained community trust. They hold NABCEP certification and carry an A-plus rating with the Better Business Bureau, and their service portfolio has expanded beyond panels to include battery backup systems, EV charging stations, and roofing, positioning them as a comprehensive home energy solutions provider.

What keeps SUNation from the top spot in our rankings is primarily a matter of scoring mechanics rather than any fundamental concern. Their review volume and longevity are impressive, but some newer competitors have edged ahead on specific metrics. Still, for Long Island homeowners seeking a locally owned company with deep roots and a proven ability to handle the full lifecycle of a solar project from design through post-installation monitoring, SUNation remains one of the most reliable choices in the state.

With a composite score of 72.4 out of 100, SUNation Energy holds the second-ranked position among New York solar companies in our 2026 ratings.