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NuWatt designs, installs, and manages solar, battery, heat pump, and EV charger systems across 9 states. One company, one warranty, one point of contact.
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Size your solar system to charge your EV for free, cut your Level 2 charger to about $500 net with the Mass Save rebate, and stack every remaining MA incentive.
Up to $700
Mass Save Rebate
~$500
Net Charger Cost
$0.03/kWh
SMART 3.0
20 yrs
SMART Term
Installing a solar system and EV charger together saves money three ways.
One electrician visit, one permit, one inspection. Bundled installation saves $500–$1,000 vs. separate projects. The charger circuit gets wired during the solar panel install.
Your solar installer runs the 240V circuit for the EV charger while they are already on-site for the panel and inverter installation. One disruption instead of two.
Stack Mass Save (up to $700 for the charger) + SMART 3.0 ($0.03/kWh for 20 years) + ConnectedSolutions ($275/kW) on the solar side. Note: the federal Section 30C home-charger credit expired June 30, 2026 and is no longer available.
Select your EV, enter your annual miles, and choose your utility to see exactly how much extra solar you need and what it will cost.
Adjust inputs below to see your MA results
24.2 kWh/100mi · 310 mi range
$0.3590/kWh
Total Annual Savings
$1,130/yr
Solar offset + SMART 3.0 Income income · 6.8 yr payback
Annual EV Energy
2,904kWh
Extra Solar Needed
2.4kW
Additional Panels
~6panels
Solar Upgrade Cost
$7,647
You save $637/yr vs gas
$1,043/yr
Solar EV Offset
$87/yr
SMART 3.0 Income
6.8 yrs
Payback Period
Based on Eversource ($0.3590/kWh) ·1,200 kWh/kW/yr MA avg · $3.16/W installed · Gas: $3.50/gal at 25 MPG · Residential 30C EV credit expired 6/30/26 · No residential ITC (25D expired 12/31/25)
Four steps from daily driving to panel count.
Start with your annual miles (US avg: 12,000) and your EV's efficiency rating (kWh per 100 miles).
12,000 mi/yrMultiply: (miles / 100) × efficiency. A Tesla Model Y at 24.2 kWh/100mi × 12,000 miles = 2,904 kWh/year.
2,904 kWh/yrDivide by MA solar production: 2,904 kWh ÷ 1,200 kWh/kW/yr = 2.4 kW of additional solar capacity.
2.4 kW extraDivide by panel wattage: 2,400W ÷ 420W/panel = 6 additional panels on your roof.
~6 panels
Annual EV energy: (12,000 ÷ 100) × 24.2 = 2,904 kWh
Additional solar: 2,904 ÷ 1,200 = 2.4 kW
Extra panels: 2,400 ÷ 420 = ~6 panels
Solar upgrade cost: 2.4 kW × $3,160/kW = $7,584
Charger net cost: $1,200 − $700 (Mass Save) = $500
Annual savings: $1,043/yr electricity + $87/yr SMART = $1,130/yr
Every dollar you can claim in 2026. No residential solar ITC (25D expired).
| Incentive | Amount | Type | Status | Notes |
|---|---|---|---|---|
| Section 30C (EV Charger) | $0 | Expired | Dead | Expired June 30, 2026 and no longer available. Previously 30% of cost, max $1,000 residential. |
| Mass Save EV Charger Rebate | Up to $700 | Utility rebate | Active | IOU customers only (Eversource, NGrid, Unitil). Not available to MLP customers. |
| SMART 3.0 | $0.03/kWh × 20 yr | State production incentive | Active | Residential ≤25 kW. Fixed rate for 20 years. ~$396/yr for 11 kW system. |
| ConnectedSolutions | $225–$275/kW/yr | Demand response | Active | Battery required. Eversource $275/kW summer, NGrid $225/kW. Unitil: not participating. |
| MA State Tax Credit | 15% up to $1,000 | State tax credit | Active | Applies to solar panel costs. Claimed on MA state income tax return. |
| Net Metering (1:1) | Full retail rate | Bill credit | Active | Class I ≤25 kW. 1:1 retail credit. Excess rolls over monthly. |
| Property Tax Exemption | 20 years | Tax exemption | Active | Solar does not increase property tax assessment for 20 years. |
| Sales Tax Exemption | 6.25% saved | Tax exemption | Active | No sales tax on solar equipment and installation in MA. |
| Section 25D (Residential Solar ITC) | $0 | Expired | Dead | Expired December 31, 2025. No federal credit for homeowner-owned solar. |
| Section 25C (Energy Efficiency) | $0 | Expired | Dead | Expired December 31, 2025. No federal credit for heat pumps, insulation, etc. |
The federal Section 30C tax credit for home EV chargers (30% of cost, up to $1,000) expired June 30, 2026 and is no longer available for new residential installations. The One Big Beautiful Bill Act (OBBBA), signed July 4, 2025, set that expiration date, and there is no extension provision. The good news: Massachusetts homeowners still have a strong incentive stack that makes a solar + EV bundle worthwhile.
Net charger cost today: A typical ~$1,200 Level 2 install nets about $500 after the Mass Save rebate (up to $700). Pair it with a solar system and SMART 3.0, net metering, and ConnectedSolutions do the heavy lifting on lifetime savings.
Level 2 is the standard for home charging. Here is what to know.
Many older MA homes have 100A or 150A panels. Adding solar + EV charger may require a 200A panel upgrade ($1,500–$3,000). Your installer should assess panel capacity during the site visit.
Massachusetts follows NEC 2023. EV chargers require a dedicated branch circuit, GFCI protection, and proper conduit for outdoor installations. All work must be permitted and inspected.
Mount the charger as close to your electrical panel as possible to minimize wiring costs. Garage installs are simplest. Outdoor installations need NEMA 4 rated enclosures for New England weather.
Your utility determines your charging cost and which programs you can access.
Eastern MA, Western MA
Best for: Lowest all-in rate of the three IOUs — strong net-metering value with solar
Central & Southeast MA
Best for: Mid-tier all-in rate — solar offset and ConnectedSolutions both available
Fitchburg area
Best for: Highest all-in rate in MA — solar offsets the most expensive electricity here
All-in bundled residential rates (delivery + supply + customer charge) at ~600 kWh/mo. Ranges run lowest to highest: Eversource $0.36/kWh → National Grid $0.39/kWh → Unitil $0.45/kWh.
If you opt into an Eversource or National Grid time-of-use rate, set your EV to charge overnight when the per-kWh price is lowest. Your solar panels generate during the day — that energy offsets your most expensive electricity and earns full retail net metering credits. Then your EV charges overnight at the lower off-peak rate. This strategy maximizes the spread between what your solar earns and what your EV costs.
MA has unique advantages for EV owners going solar.
Massachusetts exempts EVs priced under $55,000 from the 6.25% sales tax. Combined with solar charging, your total cost of EV ownership drops significantly.
SMART 3.0 pays $0.03/kWh for all solar production for 20 years — including energy used to charge your EV. A 2.4 kW EV solar adder generates ~$87/yr in SMART income on top of the electricity offset.
Massachusetts law (M.G.L. c. 184 § 23C) prohibits HOAs and condo associations from unreasonably restricting solar panel installations. Your HOA cannot block your solar + EV charger project.
Add a battery to your solar + EV system and earn $225–$275/kW per summer through ConnectedSolutions demand response. A Powerwall 3 (11.5 kW) can earn $3,162/yr with Eversource.
Massachusetts targets 100% clean electricity by 2050 and 50% emissions reduction by 2030. Your solar + EV combination directly contributes to these goals and future-proofs against rising grid rates.
Current 1:1 retail net metering for systems ≤25 kW is locked in for the life of the system. Even if MA reforms net metering in the future, your existing credits are protected.
Everything homeowners ask about bundling solar with an EV charger.
Most EVs need 2,400–4,900 extra kWh per year (12,000 miles). In Massachusetts, that translates to 2–4.1 kW of additional solar, or roughly 5–10 extra 420W panels. Efficient sedans like the Tesla Model 3 need fewer panels; trucks like the F-150 Lightning need more.
Yes. Bundling saves on installation costs (one crew, one permit), and the Mass Save rebate (up to $700) brings a typical ~$1,200 Level 2 charger install down to roughly $500 net. Note the federal Section 30C home-charger tax credit ($1,000) expired June 30, 2026 and is no longer available, so Mass Save is now the main charger incentive — but SMART 3.0 and ConnectedSolutions still reward the solar side of the bundle.
Section 30C was a federal tax credit for alternative fuel vehicle refueling property, including home EV chargers. It covered 30% of equipment and installation costs, up to $1,000 for residential. The credit for home chargers expired June 30, 2026 and is no longer available for new installations.
No. The federal Section 30C credit for home EV chargers expired June 30, 2026 and is no longer available. The One Big Beautiful Bill Act (OBBBA), signed July 4, 2025, set that expiration date, and there is no extension mechanism. Massachusetts homeowners can still use the Mass Save rebate (up to $700) plus the solar incentives (SMART 3.0, ConnectedSolutions, net metering) in a bundle.
The federal Section 30C home-charger credit expired June 30, 2026, so the main remaining incentive is the Mass Save EV charger rebate of up to $700 for IOU customers (Eversource, National Grid, Unitil). Bundling the charger with solar still saves on installation because the electrician is already on-site.
Level 2 (240V, 32–48 amp) is recommended for home charging. It adds 25–37 miles of range per hour, fully charging most EVs overnight. Level 1 (120V) only adds 3–5 miles per hour, which is impractical for daily commuters unless you drive under 30 miles/day.
A Level 2 charger unit costs $400–$800, and professional installation (240V circuit, wiring, permit) adds $400–$1,200, for a total of $800–$2,000. After the Mass Save rebate (up to $700), most homeowners net roughly $100–$1,300. The federal Section 30C credit ($1,000) that used to further reduce this cost expired June 30, 2026 and is no longer available.
Yes. Mass Save offers up to $700 for Level 2 EV charger installation for residential customers of Eversource, National Grid, and Unitil. Municipal utility customers are not eligible for Mass Save but may have their own MLP incentive programs.
Only if you have a battery backup system (like Tesla Powerwall) with a solar+battery hybrid inverter that can island from the grid. Standard grid-tied solar systems shut down during outages for safety. With a battery, you can charge your EV from stored solar energy.
On a flat rate, the time of day does not change your cost — Eversource bills an all-in $0.36/kWh and National Grid $0.39/kWh around the clock. If you opt into a time-of-use rate, charge during off-peak hours (overnight and weekends) when the per-kWh price is lowest. Either way, with solar your panels generate during the day — use that power for the home and charge the EV overnight from net metering credits.
Claim the Mass Save rebate (up to $700) and stack SMART 3.0 + ConnectedSolutions on your solar. Our MA-licensed installers handle solar panels, EV charger, and all permitting in one project.
Free, no-obligation quote. Licensed MA electricians. Typical installation: 6–10 weeks.
Complete pricing by city and system size
How solar pencils out without 25D ITC
TOU arbitrage and ConnectedSolutions
Whole home electrification in MA
$0.03/kWh for 20 years
1:1 retail credit explained
Compare financing options
National EV charger guide