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Merrimack solar costs $2.85–$3.15 per watt in 2026. A typical 8 kW system runs $22,800–$25,200. Located on the Route 3/Everett Turnpike corridor between Nashua and Manchester (~27,000 residents), Merrimack offers excellent installer access and large suburban lots ideal for solar.
Avg Cost/Watt
$3.00/W
8 kW System
~$24,000
Federal ITC
$0
Cash Payback
~8.5 yr
Federal Residential Solar Tax Credit (Section 25D) Expired December 31, 2025
Merrimack homeowners who purchase solar with cash or a loan receive $0 in federal tax credits. NH state rebate was also permanently repealed (SB 303). All prices below reflect what you actually pay. PPA/lease providers can still claim Section 48/48E (30%) through July 4, 2026. Full NH solar guide
Merrimack pricing reflects Eversource NH territory and a competitive installer market along the Turnpike corridor. No federal ITC, no state rebate — these are real 2026 out-of-pocket costs.
| System Size | Price Range |
|---|---|
| 5 kW | $14,250–$15,750 |
| 6 kW | $17,100–$18,900 |
| 8 kWMOST COMMON | $22,800–$25,200 |
| 10 kW | $28,500–$31,500 |
| 12 kW | $34,200–$37,800 |
Prices as of March 2026. Based on Merrimack-area installer data and EnergySage NH marketplace. No federal 25D ITC ($0). No NH state rebate (SB 303). No state sales tax (NH advantage).
Merrimack's Eversource territory, property tax exemption, Turnpike corridor location, and suburban housing stock shape the economics.
Merrimack is served by Eversource NH at $0.25/kWh. NEM 2.0 credits are approximately $0.21/kWh (~85% of retail). Credits roll over indefinitely with cash-out at $100. Rates are locked through 2041 under Docket DE 16-576.
Merrimack has adopted RSA 72:62 at town meeting, exempting solar energy systems from property tax. Your 8 kW system adds $0 to your assessed value, saving approximately $584/year based on Hillsborough County mill rates.
Merrimack sits right on Route 3 and the Everett Turnpike between Nashua and Manchester. This central corridor location gives homeowners access to installers from both cities, driving maximum competition and better quotes.
New Hampshire has no state sales tax at all. Unlike MA (6.25%) or CT (6.35%), you pay zero sales tax on solar equipment and installation. This saves $1,500+ compared to neighboring states on a typical system.
Merrimack is predominantly 1970s-90s subdivisions with spacious lots and south-facing roofs. Newer developments near the Premium Outlets add modern roof designs ideal for solar. Most suburban lots have minimal shading.
Merrimack participates in the Community Power Coalition of NH (CPCNH). Community Power can lower the supply portion of your bill by 5-15%. Solar customers still get NEM credits through Eversource for delivery and transmission.
How an 8 kW cash-purchased system pays back in Merrimack with no federal credit and no state rebate.
Third-Party Ownership (TPO) Still Has the ITC
If you go with a PPA or lease, the financing company claims Section 48/48E (30%) on systems beginning construction before July 4, 2026. You get a lower monthly rate because of it. You do not own the system and NEM credits typically go to the system owner.
Merrimack's location, housing stock, and demographics make it one of southern NH's best opportunities for residential solar.
Merrimack sits on the Route 3/Everett Turnpike corridor between New Hampshire's two largest cities. Many residents commute to Boston or work at local employers like Anheuser-Busch and nearby BAE Systems. High household incomes in southern Hillsborough County mean strong purchasing power for solar, and many homeowners are also adding EV chargers alongside solar systems.
Merrimack's housing stock is predominantly 1970s-90s subdivisions with large lots, standard asphalt shingle roofs, and excellent south-facing exposure. Newer developments near the Premium Outlets area have modern roof designs well-suited for solar. Unlike dense urban areas, most Merrimack lots have minimal tree shading on the south side.
Southern Hillsborough County has strong median home values, and Merrimack offers a lower tax rate than Nashua while maintaining excellent schools and services. Solar adds real resale value — studies show a $15,000-$20,000 premium for owned solar systems. With RSA 72:62 adopted, that added value is entirely property tax exempt.
Merrimack takes its name from the Merrimack River running through town. The community blends historic New England character with modern suburban growth. Home to the Anheuser-Busch brewery and the growing Premium Outlets commercial district, Merrimack is well-positioned between two major employment centers with no historic district restrictions on residential rooftop solar.
Merrimack's Turnpike corridor location keeps pricing competitive with neighboring Nashua, Hudson, and Manchester.
| City | Cost/W | 8 kW Avg | Payback |
|---|---|---|---|
| MerrimackYOU ARE HERE | $2.85-$3.15/W | $24,000 | ~8.5 yr |
| Nashua | $2.90-$3.25/W | $24,600 | ~9.5 yr |
| Hudson | $2.85-$3.15/W | $24,000 | ~9.5 yr |
| Manchester | $2.85-$3.20/W | $24,200 | ~9.3 yr |
All four towns are in Eversource territory at $0.25/kWh. Nashua has slightly higher costs due to urban density. Manchester has the most installer competition as the largest city. All towns have adopted RSA 72:62 property tax exemptions.
Merrimack has a straightforward permitting process. Most residential solar permits are issued within 2-3 weeks.
Your installer submits plans to the Merrimack Community Development Department. Standard residential solar permits include structural and electrical drawings. Typical processing: 1-2 weeks.
Physical installation of panels, inverter, and electrical connections. Most Merrimack homes with standard roofs are completed in 1-2 days.
Merrimack electrical inspector signs off on the installation. Typically scheduled within 1 week of completion.
NEM 2.0 enrollment and bi-directional meter installation. Takes 2-4 weeks after passing inspection. Your installer submits the interconnection application.
Total timeline: 5-8 weeks from signed contract to system activation. Merrimack has no historic district solar restrictions for standard residential installations.
Three paths to solar in Merrimack. Each has different economics now that the federal credit is gone.
~$24,000 upfront. All NEM credits and property tax savings go to you. Best long-term value with ~8.5-year payback.
25-year savings: ~$72,607
$0 down, 6-8% APR typical. You own the system and keep NEM credits. Monthly payments $180-$260 for 15-20 year terms. NH has no special subsidized loan program.
Total cost with interest: ~$33K-$40K
$0 down. Financing company claims 48/48E (30%) — deadline July 4, 2026. You get reduced electricity cost. You do not own the system.
Monthly: ~$110-$170 (fixed PPA rate)
Solar panels in Merrimack NH cost $2.85-$3.15 per watt installed in 2026, averaging about $3.00/W. For a typical 8 kW system, that is $22,800-$25,200 with an average of $24,000. There is no federal tax credit (25D expired December 31, 2025) and no NH state rebate (SB 303 repealed it). The price you see is the price you pay.
Yes. Merrimack has adopted RSA 72:62, which exempts solar energy systems from local property tax assessment. Your solar system adds $0 to your assessed home value. This saves approximately $584 per year based on a typical 8 kW system adding ~$15,000 in value at Hillsborough County mill rates. This is a permanent exemption with no expiration.
Merrimack is in Eversource NH territory with residential rates averaging $0.25/kWh. Under NEM 2.0, solar credits are approximately $0.21/kWh (about 85% of retail). The NEM 2.0 formula is 100% supply + 100% transmission + 25% distribution. Credits roll over monthly indefinitely, with cash-out at the $100 threshold. Rates are locked through January 1, 2041.
A cash-purchased 8 kW system in Merrimack pays back in approximately 9-10 years. This factors in $0 federal tax credit, $0 state rebate, NEM 2.0 credits at ~$0.21/kWh, property tax exemption savings of $584/year, and 2.5% annual rate escalation. After payback, you generate free electricity for the remaining 15+ years of panel life.
No, if you buy with cash or a loan. Section 25D (the 30% residential solar ITC) expired December 31, 2025. However, if you go with a third-party owned system (PPA or lease), the financing company can still claim Section 48/48E (30%) on systems that begin construction before July 4, 2026. The TPO provider passes some of that savings to you as a lower rate.
Statewide costs, NEM 2.0, and payback analysis
Largest NH city, $2.85-$3.20/W
MA border advantage, $2.90-$3.25/W
Seacoast premium, $2.95-$3.30/W
Statewide pricing: $2.85-$3.25/W
Compare financing options post-ITC
See exactly what solar costs for your Merrimack home. We factor in Eversource rates, NEM 2.0 credits, property tax exemption, your roof, and Community Power participation. No ITC padding — just real 2026 numbers.
Serving Merrimack, Nashua, Bedford, Hudson, and the Turnpike corridor