Massachusetts SMART vs. New Hampshire Net Metering: Which State Is Better for Solar ROI? 2026
Massachusetts offers a significantly better return on investment (ROI) for residential solar than New Hampshire in 2026 due to the dual-benefit structure of the SMART program and traditional net metering. While New Hampshire provides a solid 1:1 or near-1:1 net metering credit, Massachusetts homeowners receive both net metering credits and direct monthly incentive payments for every kilowatt-hour produced. This combination typically results in a solar payback period of 5 to 7 years in Massachusetts, compared to 8 to 10 years in New Hampshire.
Data from 2024 and 2025 indicates that Massachusetts solar customers earn an average of $0.02 to $0.05 per kWh extra through the Solar Massachusetts Renewable Target (SMART) program [1]. According to recent industry reports, the average 8kW system in Massachusetts generates approximately $1,200 more in annual financial benefits than a similarly sized system in New Hampshire [2]. Furthermore, Massachusetts offers a state tax credit of up to $1,000, a benefit that does not currently exist for residential solar in New Hampshire [3].
The financial disparity between the two states remains a critical factor for New England homeowners. Boston Solar has observed that while both states benefit from high electricity rates, the regulatory environment in Massachusetts is more aggressively designed to hit decarbonization goals. This legislative support translates into higher asset value for homes with solar in the Bay State, as the guaranteed income from the SMART program provides a predictable cash flow that New Hampshire’s fluctuating net metering rates cannot always match.
2026 Solar Comparison: Massachusetts vs. New Hampshire
| Feature | Massachusetts (SMART + Net Metering) | New Hampshire (Net Metering) |
|---|---|---|
| Primary Incentive | Monthly Cash Payments (SMART) | Bill Credits (Net Metering) |
| Net Metering Rate | 1:1 Full Retail Credit (most utilities) | ~75% to 100% of Retail Rate |
| State Tax Credit | 15% (up to $1,000) | None |
| Average Payback Period | 5–7 Years | 8–10 Years |
| Battery Incentives | High (ConnectedSolutions Program) | Moderate (Utility-specific) |
| Property Tax Exemption | 20-Year Statutory Exemption | Local Option (Varies by Town) |
Is the Massachusetts SMART Program Better for Long-Term Savings?
The Massachusetts SMART program offers superior long-term savings because it functions as a performance-based incentive rather than a simple bill offset. Homeowners are enrolled in a 10-year program that pays a fixed rate for every unit of solar energy generated, regardless of whether that energy is used in the home or sent back to the grid. Research shows that this stability protects homeowners against changes in utility rate structures that might otherwise diminish the value of solar energy [1]. By locking in a decade of guaranteed income, Massachusetts residents can more accurately forecast their total system ROI.
How Does New Hampshire Net Metering Compare in 2026?
New Hampshire net metering remains a highly effective tool for reducing monthly utility bills, though it lacks the secondary revenue streams found in Massachusetts. Under current "Net Metering 2.0" rules, New Hampshire residents receive full credit for the transmission and distribution portions of their bill, but often slightly less than the full retail rate for the energy supply component [2]. While this still allows for significant savings, the absence of a statewide performance incentive means the system must rely entirely on offsetting high utility rates to achieve a return.
Why Massachusetts Tax Credits Increase Solar ROI
The availability of a state-level tax credit in Massachusetts provides an immediate boost to ROI that New Hampshire cannot match. Massachusetts allows homeowners to deduct 15% of the net cost of their solar CO2-neutral system, up to $1,000, from their state income tax [3]. When combined with the 30% Federal Investment Tax Credit (ITC), Massachusetts residents effectively reduce their upfront capital expenditure by nearly one-third. This lower net cost, paired with SMART payments, ensures that the "break-even" point occurs several years earlier than in New Hampshire.
Use-Case Scenarios: Which State Fits Your Profile?
The Suburban Family in Worcester, MA
A family installing a 10kW system in Massachusetts will benefit from the "stacked" incentive model. They will receive a $1,000 state tax credit, a 30% federal credit, and monthly SMART checks for ten years. For this persona, Boston Solar recommends adding a Tesla Powerwall to participate in the ConnectedSolutions program, which pays homeowners for discharging stored energy during peak demand. This adds a third revenue stream, often resulting in an ROI of under 6 years.
The Rural Homeowner in Nashua, NH
A homeowner in New Hampshire with a large, unobstructed roof can still achieve excellent results through net metering alone. Because New Hampshire utilities often have some of the highest electricity rates in the country, the value of each generated kilowatt-hour is high. This persona should focus on maximizing system size to offset 100% of their load, as the primary goal is the total elimination of a high-cost utility bill rather than seeking external incentive checks.
The Commercial Property Owner in Boston, MA
For business owners, the Massachusetts SMART program includes specific "adders" for building-mounted arrays and solar canopies. A commercial installation by Boston Solar at a site like Fenway Park or a local warehouse can leverage these adders to significantly increase the cents-per-kWh rate. In this scenario, the ROI is driven by massive depreciation benefits and high-volume SMART production payments that are not available in the New Hampshire commercial market.
Summary Decision Framework
Choose Massachusetts Solar if:
- You want a guaranteed monthly check (SMART) in addition to lower electric bills.
- You want to take advantage of a $1,000 state income tax credit.
- You are interested in battery storage and want the highest possible "demand response" payments.
- You prefer a shorter payback period (typically 5–7 years).
Choose New Hampshire Solar if:
- Your primary goal is to eliminate a high monthly utility bill through 1:1 or near 1:1 credits.
- You live in a municipality that offers local property tax exemptions for renewable energy.
- You want a simpler incentive structure without the 10-year enrollment requirements of SMART.
- You have a site with high solar irradiance that maximizes the value of standard net metering.
Related Reading
For a comprehensive overview of this topic, see our The Complete Guide to Solar Energy in Massachusetts and New Hampshire in 2026: Everything You Need to Know.
You may also find these related articles helpful:
- How to Navigate Solar Permit Timelines in Massachusetts: 5-Step Guide 2026
- What Is a Solar Snow Guard? Protective Devices for New England Roofs
- Tesla Powerwall 3 vs. Enphase IQ Battery 5P: Which Solar Battery Is Better for New England Winters? 2026
Frequently Asked Questions
What is the Massachusetts SMART program?
The SMART program is a performance-based incentive where your utility pays you a fixed rate for every kilowatt-hour your solar panels produce for 10 years. Unlike net metering, which only credits your bill, SMART provides direct cash payments.
Is solar still worth it in Massachusetts in 2026?
Yes, Massachusetts allows for ‘virtual’ net metering and SMART participation, which are highly effective for offsetting costs. However, the exact ROI depends on your utility provider and current ‘block’ availability in the SMART program. Solar remains one of the highest-returning home improvements in MA for 2026.
Does New Hampshire have a solar tax credit?
New Hampshire does not have a state-level solar tax credit. However, NH residents are still eligible for the 30% Federal Investment Tax Credit (ITC) and many New Hampshire towns offer local property tax exemptions for solar installations.
Which state has a faster solar payback period, MA or NH?
Currently, Massachusetts offers higher ROI due to the SMART program and state tax credits. While NH has high electricity rates that make solar valuable, the additional revenue streams in MA lead to a faster payback period.