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Get a Free QuoteNashua solar costs $2.90–$3.25 per watt in 2026. A typical 8 kW system runs $23,200–$26,000. As NH's Gateway City on the Massachusetts border (~90K population), Nashua benefits from cross-state installer competition and proximity to the Boston solar supply chain. The homeowner ITC is gone, but Section 48E lease/PPA still carries a 30% credit through July 4, 2026.
Avg Cost/Watt
$3.08/W
8 kW System
~$24,600
Federal ITC
$0
48E Lease Saves
~$7,380
Cash Payback
~8.7 yr
Federal Residential Solar Tax Credit (Section 25D) Expired December 31, 2025
Nashua 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 NH state rebate was also permanently repealed (SB 303).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. Lease/PPA providers can still claim Section 48E (30%) through July 4, 2026 — see how that works. Full post-ITC incentive guide
Nashua pricing reflects Eversource NH territory and border-city competition. No federal ITC, no state rebate — these are real out-of-pocket costs for cash/loan purchases.
| System Size | Cash/Loan Price |
|---|---|
| 5 kW | $14,500–$16,250 |
| 6 kW | $17,400–$19,500 |
| 8 kWMOST COMMON | $23,200–$26,000 |
| 10 kW | $29,000–$32,500 |
| 12 kW | $34,800–$39,000 |
Prices as of March 2026. Based on Nashua-area installer data and EnergySage NH marketplace. No federal 25D ITC ($0). No NH state rebate (SB 303). No state sales tax (NH advantage). Lease/PPA pricing differs — see Section 48E section below.
The homeowner tax credit (25D) is dead. But the commercial/third-party ITC (Section 48E) is still alive for systems beginning construction before July 4, 2026. Here is how Nashua homeowners access it.
A financing company (the “third-party owner”) installs and owns the solar system on your Nashua roof. You sign a lease or power purchase agreement (PPA) for 20-25 years.
The financing company claims the Section 48E credit (30% of system cost) on their taxes. On a $24,600 system, that is ~$7,380 in tax credits they receive — not you.
The ITC savings flow through to you as lower lease/PPA rates. Typical PPA rate: $0.14-$0.18/kWh vs Eversource's $0.25/kWh. That is 28-44% off your current electric rate with $0 upfront.
48E Deadline: Construction Must Begin Before July 4, 2026
To qualify for 48E, the financing company must demonstrate “beginning of construction” before the OBBBA cutoff date. For a Nashua homeowner, this means signing a lease/PPA and having the installer order equipment or begin physical work before July 4, 2026. If you are considering this route, start collecting quotes now. Full Section 48E guide for NH homeowners
Nashua's location on the Massachusetts border creates a unique competitive dynamic that benefits solar buyers. Proximity to the Boston metro solar market drives pricing down.
Nashua sits on the MA border, drawing installers from both states. MA-based companies (serving a larger market with higher volume) routinely cross the border, adding 3-5 extra quotes for Nashua homeowners compared to inland NH cities like Laconia or Keene.
Massachusetts has one of the most competitive solar markets in the US. MA installers bringing aggressive pricing across the border forces NH-based companies to match or undercut. This is why Nashua pricing is lower than the NH statewide average despite being slightly higher than Manchester.
Nashua is 35 miles from the Boston metro distribution hub. Shorter delivery distances mean lower logistics costs for equipment. NH installers based in the Nashua-Manchester corridor have the best supply chain access in the state.
Border proximity means Nashua-area installers recruit electricians and roofers from both the NH and MA labor markets. More available labor keeps installation crews busy and costs predictable, reducing the risk of project delays.
Pro tip: When collecting quotes in Nashua, request proposals from at least 2 NH-based and 2 MA-based installers. The cross-border competition typically saves $500-$1,500 on a full system compared to what you would pay in a single-state market like northern NH.
Many Nashua residents have family, friends, or co-workers in neighboring MA cities like Lowell, Tyngsborough, or Dracut. The question always comes up: is solar better on the NH side or the MA side? Here is the honest comparison.
We compare Nashua to Lowell MA (19 miles south, National Grid territory) as the closest comparable border city.
| Factor | Nashua NH | Lowell MA |
|---|---|---|
| Avg Cost/Watt | $2.90-$3.25/W | $3.00-$3.50/W |
| 8 kW System Cost | ~$24,600 | ~$26,000 |
| Sales Tax on Solar | $0 (no state sales tax) | $0 (MA exempts solar) |
| Federal Tax Credit (25D) | $0 (expired Dec 2025) | $0 (expired Dec 2025) |
| State Rebate | $0 (SB 303 repealed) | SMART 3.0: ~$0.03/kWh for 20 years |
| Net Metering | NEM 2.0: ~85% retail ($0.21/kWh) | 1:1 retail ($0.28/kWh) |
| Electric Rate | $0.25/kWh (Eversource NH) | $0.28/kWh (NGrid MA) |
| Property Tax Exempt | Yes (RSA 72:62 adopted) | Yes (MA Ch. 59 statewide) |
| Payback Period | ~9.5 years | ~7-8 years |
| 48E Lease/PPA Available | Yes (through July 4, 2026) | Yes (through July 4, 2026) |
Massachusetts has a faster payback (~7-8 years vs ~9.5 years) thanks to SMART 3.0 and higher NEM rates. But Nashua has a lower upfront cost and you still get strong 25-year returns (~$72,007 net savings). If you live in Nashua, you install in Nashua — you cannot install in MA and claim MA incentives. The good news: your lower system cost, zero sales tax, and locked NEM 2.0 through 2041 still make Nashua solar a solid investment, even without MA-level incentives.
The financial building blocks of solar in Nashua — no federal credit or state rebate, but strong NEM 2.0 credits, property tax exemption, and zero sales tax.
Nashua 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. Rates locked through January 1, 2041 under Docket DE 16-576.
Nashua has adopted RSA 72:62, exempting solar energy systems from property tax. Your 8 kW system adds $0 to assessed value, saving approximately $584/year at the local mill rate. Permanent exemption.
Nashua participates in CPCNH. Community Power lowers the supply portion of your bill by 5-15%. Solar NEM credits still flow through Eversource for delivery. This can slightly reduce NEM credit value but lowers your overall bill.
NH has no state sales tax. This saves $1,500+ on a typical system compared to buying the same system in Massachusetts (6.25% tax) or Connecticut (6.35%). A meaningful advantage for border residents.
The federal homeowner credit and NH state rebate are both gone. Here is an honest accounting of every incentive that still applies in Nashua in 2026 — and the ones that do not.
~85% of retail rate. 100% supply + 100% transmission + 25% distribution. Credits roll over indefinitely. Rate structure locked through January 1, 2041 (Docket DE 16-576). This is the single most valuable NH solar incentive.
~$2,244/yr electricity savings
Nashua has adopted RSA 72:62. Your solar system adds $0 to assessed property value. Permanent exemption, no expiration date, no income limits.
~$14,600 over 25 years
NH has zero sales tax on all purchases. This saves $1,500+ compared to buying the same system in MA (6.25%) or CT (6.35%). Note: MA does exempt solar specifically, so this advantage is vs. other purchases, not vs. MA solar.
One-time savings at purchase
The third-party financing company claims ~$7,380 on an 8 kW system. You benefit through lower monthly PPA/lease rates ($0.14-$0.18/kWh vs $0.25/kWh Eversource). Must begin construction before July 4, 2026.
$0 upfront, immediate bill reduction
Expired December 31, 2025
Was 30% for homeowners buying with cash or loan. Now $0. Signed away by OBBBA (July 4, 2025). No indication of reinstatement.
Permanently Repealed (SB 303, 2024)
Was $0.20/W capped at $1,000. SB 303 eliminated the program permanently. No replacement program is being considered.
How an 8 kW system pays back in Nashua with no federal credit, no state rebate, and no sales tax.
Prefer $0 Down? 48E Lease/PPA Is Your Best Option
If you do not want to pay ~$24,600 upfront, a lease or PPA lets you go solar with $0 down. The financing company claims the 30% Section 48E credit, and you pay a fixed rate of ~$0.14-$0.18/kWh (vs $0.25/kWh Eversource). Construction must begin before July 4, 2026. NH lease vs PPA guide | Cash vs loan vs lease comparison
Nashua runs slightly above Manchester on price but benefits from the same Eversource rates and property tax exemption.
| City | Cost/W | 8 kW Avg | Payback |
|---|---|---|---|
| NashuaYOU ARE HERE | $2.90-$3.25/W | $24,600 | ~9.5 yr |
| Manchester | $2.85-$3.20/W | $24,200 | ~9.3 yr |
| Concord | $2.85-$3.15/W | $24,000 | ~9.1 yr |
| Portsmouth | $2.95-$3.30/W | $25,000 | ~9.2 yr |
Manchester has slightly lower per-watt cost due to more local installer competition. Concord benefits from Unitil's higher rate for faster payback. Portsmouth has a seacoast premium but high property values.
Solar panels in Nashua cost $2.90-$3.25 per watt installed in 2026, averaging about $3.08/W. A typical 8 kW system runs $23,200-$26,000 with an average of $24,600. There is no federal tax credit (25D expired December 31, 2025) and no NH state rebate (SB 303 repealed it). Nashua pricing benefits from MA border competition but runs slightly above Manchester due to fewer local installers.
Yes. Nashua is on the Massachusetts border, which means MA-based solar installers actively compete for Nashua projects. Massachusetts has one of the most competitive solar markets in the US. This cross-border competition adds 3-5 extra installer quotes compared to inland NH cities and applies downward pricing pressure. Supply chain proximity to Boston also reduces logistics costs.
Yes. Nashua has adopted RSA 72:62, exempting solar systems from property tax assessment. Your solar installation adds $0 to your assessed value regardless of how much it increases your home value. This saves approximately $584/year for a typical 8 kW system. The exemption is permanent with no expiration.
Nashua is in Eversource NH territory with an average residential rate of $0.25/kWh. NEM 2.0 credits are approximately $0.21/kWh (about 85% of retail). The formula is 100% supply + 100% transmission + 25% distribution. Credits roll over indefinitely and rates are locked through January 1, 2041 under Docket DE 16-576.
Get quotes from both. NH-based installers know local permitting and Eversource interconnection best. MA-based installers often have higher volume and more aggressive pricing. The ideal approach is to collect 3-5 quotes from a mix of NH and MA companies. All installers working in NH must be licensed for electrical work in New Hampshire regardless of their home state.
Not directly. The Section 25D homeowner tax credit is dead (expired December 31, 2025). However, a lease or PPA financing company can claim Section 48E (30% ITC) on systems where construction begins before July 4, 2026. The financing company keeps the credit but passes some of the savings to you through lower monthly rates. This makes leases and PPAs significantly more attractive in 2026 than in years when homeowners could claim their own credit.
Nashua has a lower per-watt cost ($2.90-$3.25/W vs $3.00-$3.50/W in Lowell), mainly because of NH zero sales tax and lower installer overhead. However, Lowell MA has a faster payback (~7-8 years vs ~9.5 years) thanks to SMART 3.0 incentive payments (~$0.03/kWh for 20 years), 1:1 net metering at higher retail rates ($0.28+/kWh), and no state sales tax on solar equipment (MA-specific exemption). If you live in Nashua, you install in Nashua regardless. But understand that your NH system costs less upfront even though MA incentives shorten payback.
Four incentives remain: (1) NEM 2.0 net metering credits at ~85% of retail rate (~$0.21/kWh), locked through 2041; (2) RSA 72:62 property tax exemption, which Nashua has adopted, saving ~$584/year; (3) No state sales tax (NH has none); (4) Section 48E lease/PPA where the financing company claims 30% ITC through July 4, 2026. There is no NH state rebate (SB 303 repealed it) and no federal homeowner tax credit (25D expired).
Statewide costs, NEM 2.0, and payback analysis
Every incentive still available (and what died)
48E-backed TPO: $0 down, 30% credit through July 2026
How the commercial ITC works for residential lease/PPA
NOT 1:1 retail — ~85% credit rate, locked through 2041
Side-by-side financing comparison for NH homeowners
City-by-city cost breakdown across all of NH
Largest NH city, $2.85-$3.20/W
Seacoast premium, $2.95-$3.30/W
Why NH solar still works at $0.27/kWh without any incentives
Compare NEM rates and solar economics by utility
RSA 72:62 property tax exemption and $0 sales tax
See exactly what solar costs for your Nashua home. We connect you with NH and MA-based installers for maximum competition. Real 2026 prices — no phantom ITC savings. Ask about 48E lease options before the July 4, 2026 deadline.
Serving Nashua, Hudson, Merrimack, Hollis, and southern NH