How to Choose a Solar Installer in New England

Start with neighbors or friends who have had solar installed in your area and ask specifically about their experience after installation — not just whether they're happy with the system, but whether the company was responsive when questions or issues came up afterward. After that, collect at least three competing quotes from companies with verifiable local installation history in your state, read reviews on independent platforms rather than testimonials on the installer's own site, and verify active state licensing or registration and insurance before committing.

The most reliable signal of a quality New England solar installer is a combination of: in-house installation crews (not subcontractors), a track record of at least 3 to 5 years of active operation in your specific state, specific and accurate knowledge of your state's incentive programs, equipment specifications named in writing before you sign, and a workmanship warranty that names who is responsible if the installing company is no longer in business when you need service. Any company that checks all five of those boxes is worth a serious conversation.

The 20% rule is a solar sizing guideline — not a regulatory requirement — that suggests sizing your residential solar system to produce roughly 20% more electricity than your home's historical average annual consumption. The extra capacity acts as a buffer to accommodate future increases in household electricity use: adding an electric vehicle, upgrading to a heat pump, or simply having higher usage years than the average the system was sized against.

In Massachusetts, SMART program rules allow systems to be sized to offset up to 100% to 125% of annual consumption — so the 20% buffer guideline fits within the allowable sizing range. In Rhode Island, systems can be sized up to 125% of annual consumption under net metering rules. In New Hampshire, the sizing limit is 100% of annual consumption. We confirm the applicable sizing limit for your state and utility on every quote and model the system against your actual usage history rather than a regional average.

The most common reasons homeowners end up wanting to remove or regret solar panels fall into a few specific categories. Predatory lease or Power Purchase Agreement (PPA) contracts are the most significant — long-term lease agreements that lock homeowners into monthly payments that escalate over time, complicate home sales because the lease transfers to the buyer, and often don't deliver the savings that were promised at signing. When reviewing any solar financing option, verify whether you're purchasing the system or entering a lease or PPA, and understand the full terms of any escalator clauses.

The second major category is poor installation quality — specifically roof leaks from improperly flashed penetrations, which can cause significant interior damage over time. This is exactly why the workmanship warranty, who backs it, and what happens if the installer goes out of business are the most important warranty questions to ask before signing. The third category is installer failure — companies that went bankrupt or shut down and left homeowners with systems that have no warranty support, no monitoring access, and no service coverage. Over 100 solar companies have failed in the US since 2024. Choosing a company with active installer failure protection is the most important long-term risk mitigation available to New England homeowners today.

Four rules cover the vast majority of solar scam situations. First, always collect at least three competing quotes — a single quote gives you no frame of reference for whether the price, equipment, or terms are legitimate. Second, never sign under same-day pressure — any deadline that disappears if you say "I need to review this with my partner" is a sales tactic, not a real constraint. Third, demand the full cash price and all financing terms in writing before signing, including any rate escalators that apply after an initial promotional period. Fourth, verify the company's licensing through your state's public database independently — don't rely on the company's own claims about their credentials.

Beyond those four, the single most overlooked solar scam protection is checking what happens to your warranty if the company goes out of business. More than 100 solar companies have failed in recent years, including well-known national providers. A warranty that exists only as long as the company that issued it is worth very little on a 25-year system. Ask specifically about installer failure protection before you sign anything.

The most common issues with residential solar systems in New England fall into a few categories. Inverter failures are the most frequent equipment issue — inverters have shorter design lifespans than panels, and replacement costs vary significantly by inverter type. Roof leaks from improperly flashed penetrations are the most damaging workmanship failure — water intrusion through a panel mount point can cause interior structural and insulation damage that isn't visible until it's severe. Wiring and connection faults can reduce system output over time without triggering obvious alerts. Pest infestations — particularly squirrels and birds nesting under the panel array — are a more common issue in New England than most homeowners expect.

All of these issues are either prevented by or addressed through proper installation quality, active system monitoring, and responsive warranty service. A solar system installed with improperly flashed penetrations, without active production monitoring, and backed by a company that's no longer in business is exposed to all of the above. The installation quality and who stands behind it for 25 years are more important than the panel brand or the monthly payment amount.

The questions that matter most before going solar are the ones most homeowners don't ask. Start with the equipment: what specific panel brand, model, and wattage are you quoting, what inverter brand and model, and what are the exact warranty terms for each component? Move to the crew: will the installation be done by your own employees or subcontracted to a third party? Then ask about the warranty: who specifically backs the workmanship warranty, and what happens to that warranty if your company closes?

On the incentive side, ask: which specific programs apply to my utility account and address, is the SMART or REG program currently at capacity or is there open allocation, and how do the programs change if I add battery storage? On the roof: what is your honest assessment of my roof's remaining useful life, and do you recommend coordinating a replacement before installation? And finally: what monitoring system is included, how will I know if my system is underperforming, and who do I contact for service in year 10? The answers to those questions tell you far more about the quality of the company you're choosing than any presentation, proposal graphic, or monthly payment estimate. See our incentives guide and our About page for how we answer each of those questions.