Granite State Solar

Granite State Solar has been a dedicated New Hampshire installer for 18 years, operating from their base in Bow to serve homeowners across the Granite State. In a market where national chains and out-of-state companies periodically enter and exit, the company's nearly two-decade commitment to a single state gives them an intimate familiarity with New Hampshire's permitting landscape, utility interconnection requirements, and the specific incentive programs that make solar economics work for local homeowners.

The company has earned consistent recognition within the state, including being voted Best of Business for solar for close to a decade and winning the Best of the 603 award every year the competition has been held from 2021 through 2024. These are community-driven honors rather than pay-to-play industry awards, which makes them a more reliable signal of genuine local reputation. Their 4.8-star Google rating across 223 reviews reinforces that picture, with customers regularly citing professionalism, system design quality, and a smooth installation experience from initial quote through final commissioning.

Granite State Solar focuses on both residential solar panel systems and backup power solutions, a combination that has become increasingly relevant as New Hampshire homeowners seek resilience against winter storms and occasional grid instability. Their installation teams handle the full project lifecycle in-house, from site assessment and design through permitting, installation, and utility interconnection, avoiding the subcontractor handoffs that can introduce quality control gaps.

Some customer feedback has flagged occasional delays in post-installation service visits, a pattern that is not uncommon among successful regional installers whose growth sometimes outpaces their service department staffing. For homeowners considering Granite State Solar, it is worth asking about current service response timelines during the sales process. That caveat aside, the company's track record of repeat business and community recognition speaks to a level of operational consistency that is difficult to manufacture.

Granite State Solar earns a composite score of 73.1 out of 100, placing them at number three among New Hampshire solar installers for 2026.