Best Solar Companies in New Hampshire (2025): Top Installers & Reviews

What to Look for in a Solar Company

Not all solar installers are created equal. Here are the key factors to evaluate when choosing a company in New Hampshire:

1. Certifications and Licenses

At minimum, your installer should have:

• NABCEP certification: The North American Board of Certified Energy Practitioners certification is the gold standard for solar installers. It requires thorough training and ongoing education.
• State contractor license: New Hampshire requires solar installers to be licensed. Always verify their license is current and in good standing.
• Electrical license: Solar installations involve electrical work. Your installer should utilize licensed electricians.
• Insurance: Check they carry both general liability and workers' compensation insurance to protect you from liability.

2. Experience and Track Record

Look for installers with at least 5 years in business and hundreds of completed installations. Well-established companies are more likely to honor warranties and provide ongoing support. Ask potential installers:

• How many installations have you completed in New Hampshire?
• How long have you been in business?
• Can you provide references from recent customers in my area?
• What happens if your company goes out of business—who honors my warranty?

3. Equipment Quality

The equipment your installer uses directly impacts your system's performance and lifespan. Premium panels from manufacturers like SunPower, LG, or REC will cost more but produce more energy and last longer than budget options.

Key equipment considerations:

• Panel efficiency: Higher efficiency panels produce more power in less space—important if your roof area is limited.
• Warranties: Look for 25-year panel warranties and 10+ year inverter warranties.
• Inverter technology: Microinverters or power optimizers commonly beat string inverters, especially on roofs with shading or complex layouts.

4. Workmanship Warranty

Equipment warranties cover defective products, but workmanship warranties cover installation errors and roof penetrations. Look for installers offering at least a 10-year workmanship warranty. Some top companies offer 25-year coverage.

5. Customer Service and Support

Solar systems require tracking and occasional maintenance over 25+ years. Consider:

• Does the company have a local office or are they out-of-state?
• Who handles service calls—internal technicians or subcontractors?
• What's their response time for issues or questions?
• Do they offer system monitoring and proactive maintenance?

National vs. Local Solar Companies

New Hampshire property owners can choose between large national installers and smaller local companies. Each has advantages and drawbacks.

National Companies

Pros:

• More financing options with competitive rates
• Proven processes and tested systems
• Higher volume can mean better equipment pricing
• Strong financial stability and warranty backing

Cons:

• Less personalized service
• May use subcontractors rather than in-house crews
• Harder to get in touch with decision-makers if issues arise
• Cookie-cutter approach may not customize for your specific roof

Local Companies

Pros:

• Personalized service and attention to detail
• Deep knowledge of local requirements and utility requirements
• Company-employed installation crews (commonly)
• Easier to contact owners and decision-makers
• More invested in local reputation

Cons:

• Fewer financing options
• May have increased equipment costs due to lower volume
• Longer wait times during busy seasons
• Higher risk if company goes out of business

Bottom line: National companies are often better for straightforward installations with standard financing needs. Local companies stand out when you need customization, have a complex roof, or value hands-on service. Get quotes from both types to compare.

Red Flags to Avoid

The solar industry has developed rapidly, drawing in both reputable companies and bad actors. Watch out for these warning signs:

1. High-Pressure Sales Tactics

Be wary of salespeople who force you to sign immediately with claims like "this price expires today" or "there's only one slot left." Reputable installers give you time to make an informed decision. If you feel rushed, walk away.

2. Unrealistic Savings Promises

Some companies greatly exaggerate potential savings to close deals. Be wary of claims like "eliminate your electric bill completely" or "get free solar panels from the government." Ask for detailed calculations based on your actual energy usage.

3. Door-to-Door Sales

While not all door-to-door solar sales are scams, this approach attracts less reputable operators. If someone knocks on your door selling solar, tell them you'll research companies on your own timeline.

4. Requests for Large Upfront Deposits

Legitimate installers commonly ask for small deposits (10-20%) to begin work. Be highly cautious if someone asks for 50% or more upfront, especially before permits are approved or equipment is ordered.

5. No Physical Address or Local Presence

Companies without a verifiable physical address in or near New Hampshire are risky. If something goes wrong, you want an installer you can actually visit or who can quickly send technicians to your home.

6. Unwilling to Provide References

Established installers are proud of their work and happy to provide recent customer references. If a company avoids about references, that's a major red flag.

7. Pushy About Specific Financing

Some installers push specific financing products because they earn higher commissions, not because it's best for you. Reputable companies present multiple options and help you choose based on your financial situation.

How to Compare Solar Quotes

Getting multiple quotes is essential, but comparing them can be confusing. Here's what to focus on:

1. Price per Watt

Don't just compare total system costs—calculate the price per watt to normalize for system size. In New Hampshire, residential solar typically costs $2.50-$3.50 per watt before incentives. For example:

• 8 kW system at $24,000 = $3.00/watt
• 8 kW system at $20,000 = $2.50/watt

If one quote is significantly cheaper per watt, ask why. It might be lower-quality equipment, less experienced installers, or hidden fees to be added later.

2. Equipment Specifications

Compare apples to apples by examining:

• Panel manufacturer, model, and efficiency rating
• Inverter type (string, microinverters, or power optimizers)
• Mounting hardware and racking system
• Monitoring system included

A quote with premium equipment justifies a higher price per watt. Budget panels might save money upfront but produce less energy over 25 years.

3. Production Estimates

Each proposal should include estimated annual energy production in kilowatt-hours (kWh). Higher efficiency equipment or better system design should produce more energy. Be skeptical of wildly optimistic production estimates.

4. Warranties

Compare warranty coverage carefully:

• Panel warranty (typically 25 years, but coverage varies)
• Inverter warranty (10-25 years depending on type)
• Workmanship warranty (how long is installation covered?)
• Who backs the warranties—the manufacturer or the installer?

5. Financing Terms

If you're financing, compare:

• Interest rates (APR)
• Loan term length
• Dealer fees (some loans have hidden fees built into the system price)
• Prepayment penalties
• What happens if you sell your home

6. What's Included

Make sure quotes itemize everything included:

• Permits and utility interconnection
• System design and engineering
• Removal and reinstallation if roof work is needed
• Monitoring system and app access
• Post-installation support

Some quotes seem cheaper but exclude items other installers include. Make sure you're comparing complete packages.

How to Vet Solar Installers

Before signing a contract with any solar company in New Hampshire, complete these due diligence steps:

1. Verify Licenses and Insurance

Check that the installer holds current New Hampshire contractor and electrical licenses. Ask for proof of liability and workers' compensation insurance, and call the insurance company to verify the policy is active.

2. Check Online Reviews

Look beyond the star rating on Google or Yelp. Read actual reviews, focusing on:

• How the company handled problems or issues
• Quality of customer service and communication
• Timeliness of installation and responsiveness
• System performance compared to promises

Be wary of companies with exclusively 5-star reviews—they might be fake. A mix of 4- and 5-star reviews with detailed comments is more trustworthy.

3. Contact References

Ask for contact information for 3-5 recent customers. When you call them, ask about their experience, any surprises or problems, and whether they'd hire the company again.

4. Visit Completed Installations

If possible, ask to see 1-2 completed installations in person. This lets you evaluate the installer's workmanship, cable management, and attention to detail. Sloppy installations are a red flag.

5. Review the Contract Carefully

Never sign a contract without reading every word. Key things to verify:

• Total system cost and payment schedule
• Specific equipment models to be installed
• Production guarantees (if any)
• What's included and excluded
• Timeline for completion
• Cancellation policy and any fees
• Who's responsible if permits are delayed
• Warranty terms and how to make claims

Don't hesitate to have a lawyer review the contract if anything seems unclear or one-sided. Spending $200-$300 on legal review can save you thousands later.

6. Trust Your Gut

If something feels off—pushy sales tactics, evasive answers, or promises that sound too good to be true— walk away. There are plenty of reputable installers in New Hampshire. Don't settle for a company that makes you uncomfortable.

How Our Installer Matching Service Works

Finding and vetting solar installers is time-consuming. We've done the heavy lifting for you by pre-screening installers across New Hampshire based on the criteria outlined in this guide.

What We Check

Every installer in our network must meet strict requirements:

• Valid New Hampshire contractor and electrical licenses
• Active liability and workers' compensation insurance
• At least 5 years in business with proven track record
• Positive customer reviews and references
• Use of tier-1 equipment from reputable manufacturers
• Comprehensive warranties on workmanship and equipment

How It Works

1. Tell us about your home: Answer a few questions about your location, property type, energy usage, and solar goals.
2. Get matched: We connect you with up to 3 pre-vetted installers in your area who are a good fit for your project.
3. Compare quotes: Each installer provides a detailed proposal including equipment specs, pricing, production estimates, and financing options.
4. Make your decision: Review the proposals, ask questions, and choose the installer you trust most. There's no pressure or obligation.

Our service is completely free for homeowners. We're compensated by installers when you complete a project, so we only succeed when you're happy with your installation.

Bottom line: You get access to vetted installers and competitive quotes without spending hours researching companies or worrying about scams.

New Hampshire-Specific Considerations

When choosing a solar installer in New Hampshire, keep these local factors in mind:

Net Metering Policies

New Hampshire offers net metering, which allows you to earn credits for excess energy your system sends to the grid. Your installer should understand how to optimize system sizing to maximize net metering benefits. Ask how they calculate the ideal system size for your usage patterns and utility rate structure.

Permitting and Interconnection

Solar permitting requirements vary by municipality in New Hampshire. Choose an installer with deep experience navigating local building departments and utility interconnection procedures. Ask how long permitting typically takes in your area and who handles the paperwork.

Weather Considerations

With an average of 4.1 peak sun hours per day, New Hampshire is a good location for solar. Your installer should account for seasonal variations in production when designing your system. In lower-sun states, using higher-efficiency panels can help maximize production.

Local Incentives and Programs

New Hampshire offers property tax exemption. Your installer should be thoroughly familiar with available incentives and help you maximize savings. They should also handle all required documentation for incentive applications.

Solar Loan vs Lease vs PPA: Quick Comparison