SUNation Energy

SUNation Energy serves Ronkonkoma and surrounding Long Island communities with residential and commercial solar installations, holding a 4.7-star rating across 953 reviews. The company has operated since 2003, offering solar panel systems, battery storage solutions, and integrated home energy services throughout Suffolk County. Customers can reach the office at (631) 750-9454 during weekday business hours or on weekend afternoons.

The company differentiates itself through strategic manufacturer partnerships including Sunpower, Tesla Powerwall, and Enphase battery systems. Unlike smaller installers, SUNation provides comprehensive project management from permitting through final inspection, handling utility interconnection paperwork for customers. Their Guardian Service program offers ongoing system monitoring, and they maintain a dedicated service department for existing customers needing maintenance or repairs. The company also coordinates roofing work when roof replacement is needed prior to solar installation.

Reviewers consistently mention specific technicians by name, describing positive installation experiences. Caroline Burns praised installer Steve and his crew for arriving on time, working efficiently, and completing her residential solar installation in a single day while explaining each step. Lawrence Lacagnino noted that team member Dave took time to educate him on solar technology as a first-time buyer, and that the company even helped coordinate tree removal that had been blocking roof coverage. Another reviewer named John M received commendation for professional communication throughout a Tesla Powerwall installation in December 2025.