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Affluent South Shore town with ~24,000 residents. Served by HMLP (Hingham Municipal Lighting Plant) at $0.18/kWh -- significantly lower than Eversource. This changes the solar math: no SMART 3.0, no ConnectedSolutions, but still profitable long-term.
HMLP municipal utility • $0.18/kWh • NO SMART 3.0 • NO ConnectedSolutions
2026 Reality: The 30% federal tax credit (Section 25D) expired for homeowners December 31, 2025. All costs in this guide reflect $0 federal credit. Full details
Hingham is served by HMLP, a municipal utility -- NOT Eversource
This means Hingham homeowners do NOT qualify for SMART 3.0 or ConnectedSolutions. HMLP rates are ~$0.18/kWh (37% lower than Eversource). Solar still works in Hingham, but the economics are different from neighboring Eversource towns. This guide provides honest numbers specific to HMLP territory.
A 12.5 kW solar system in Hingham costs $38,750-$43,125 in 2026. With HMLP at $0.18/kWh (no SMART 3.0, no ConnectedSolutions), the payback is 12-15 years -- longer than Eversource towns but still generating ~$68,000 in savings over 25 years.
Cost Range
$3.1-$3.45/W
Fully installed
Avg System
12.5 kW
Hingham average
Payback
12-15 yrs
Cash purchase (HMLP)
25-Year Savings
~$68K
Estimated total value
Hingham is an affluent coastal town of ~24,000 residents on the South Shore with a picturesque harbor, historic downtown, and high property values. The key difference for solar: Hingham is served by HMLP (Hingham Municipal Lighting Plant), which charges significantly lower rates than Eversource but excludes residents from state programs tied to investor-owned utilities.
Population
~24,000
Median Home Value
~$950,000
Utility
HMLP (Municipal)
Electric Rate
$0.18/kWh
Typical System Size
11-16 kW
Solar Irradiance
4.2 kWh/m²/day
Understanding the differences between Hingham (HMLP) and neighboring Eversource towns is critical for accurate solar planning. Here is an honest comparison.
| Factor | Hingham (HMLP) | Eversource Towns |
|---|---|---|
| Electric Rate | $0.18/kWh | $0.2836/kWh |
| SMART 3.0 | NOT eligible | $0.03/kWh for 20 years |
| ConnectedSolutions | NOT eligible | $3,250/yr (10 kW battery) |
| Net Metering | HMLP sets terms | 1:1 retail (state law) |
| Payback Period | 12-15 years | 7-8.5 years |
| MA State Tax Credit | $1,000 (eligible) | $1,000 (eligible) |
| Property Tax Exempt | 20 years (eligible) | 20 years (eligible) |
| Sales Tax Exempt | Yes (eligible) | Yes (eligible) |
Bottom line: Hingham's lower HMLP rate saves money on electricity but eliminates access to SMART 3.0 (~$8,200 over 20 years) and ConnectedSolutions (~$3,250/year). The net effect is a longer payback period but solar is still profitable over 25 years. Hingham homeowners with high energy consumption (large homes, EVs, heat pumps) benefit the most from solar.
Costs for different system sizes in Hingham at $3.10-3.45/W. Hingham homes range from smaller Capes (7-9 kW) to large Harbor estates (15-18+ kW).
| System Size | Low Cost | High Cost | Net Metering | Best For |
|---|---|---|---|---|
| 7 kW | $21,700 | $24,150 | Check HMLP | Smaller Cape or ranch |
| 9 kW | $27,900 | $31,050 | Check HMLP | Mid-size colonial |
| 12.5 kW | $38,750 | $43,125 | Check HMLP | Typical Hingham single-family |
| 15 kW | $46,500 | $51,750 | Check HMLP | Large home / high usage |
| 18 kW | $55,800 | $62,100 | Check HMLP | Estate home / EV charging |
Prices include equipment, labor, permits, and grid interconnection. No federal tax credit included (expired). No SMART 3.0 income (HMLP territory). Confirm HMLP net metering terms before signing.
Hingham's neighborhoods vary from the historic harbor area to newer suburban developments. Here is how the main residential areas stack up for solar.
Home Types
Historic colonials, Victorians, newer infill
Avg System
10-13 kW
Charming New England village center with a mix of historic and newer homes. Some properties have local historic district considerations. Mature tree canopy in parts. Walkable village drives eco-conscious homeowners.
Home Types
Waterfront estates, historic homes
Avg System
13-17 kW
Premium waterfront neighborhood with large homes and high energy consumption. Coastal salt air exposure requires marine-grade mounting hardware. Excellent solar production from unobstructed coastal sky access.
Home Types
Newer construction, colonials, subdivisions
Avg System
12-16 kW
Residential area with many homes built from the 1980s-2000s. Modern roof construction supports solar without structural upgrades. Larger lots with good solar access and less tree canopy than older sections of town.
Home Types
Colonials, Capes, ranches
Avg System
11-14 kW
Established residential neighborhood with well-maintained single-family homes. Generally good roof access. Mix of mid-century and newer homes. Moderate tree canopy with most lots getting adequate solar exposure.
Hingham's Building Department handles solar permits. The process typically takes 2-4 weeks. Note: interconnection is through HMLP (not Eversource), which may have different timelines and requirements.
Installer assesses roof, shade, and structure. Harbor properties flagged for coastal/historic considerations.
Application to Hingham Building Department. Historic district homes may require additional review.
Typical installation 1-3 days. Electrical and building inspection by the Town of Hingham.
HMLP (not Eversource) approves grid connection. Contact HMLP for interconnection timeline and net metering activation.
Because Hingham is served by HMLP (municipal), some statewide incentives do NOT apply. Here is an honest breakdown.
15% of system cost, capped at $1,000. Available to ALL MA residents regardless of utility.
$1,000
One-time credit
Solar systems exempt from 6.25% MA sales tax. Available to all MA residents.
~$2,559
Savings on typical system
Solar-added value exempt from property tax for 20 years. Hingham's high property values make this exceptionally valuable.
~$531/yr
20-year exemption (~$10,620 total)
NOT available. SMART is limited to investor-owned utility (Eversource, National Grid) territories. HMLP customers are excluded.
$0/yr
Not eligible (HMLP territory)
NOT available. ConnectedSolutions is an Eversource/National Grid program. HMLP does not participate.
$0/yr
Not eligible (HMLP territory)
NOT available. Expired December 31, 2025 for ALL homeowners regardless of utility. $0 federal credit.
$0
Expired (OBBBA)
Three ways to pay for solar in Hingham. Note: lower HMLP rate ($0.18/kWh) means lower monthly savings compared to Eversource towns. Cash purchase offers the best ROI for HMLP customers.
Upfront
~$38,750-$43,125
Monthly
$0
25-yr Savings
~$68K
Ownership
You own it
Longer payback (12-15 years) due to lower HMLP rates. Still profitable long-term. Property tax exemption adds significant value.
Upfront
$0 down
Monthly
~$265-370/mo (5.5-8% APR)
25-yr Savings
~$30-50K
Ownership
You own it
10-25 year terms. Monthly savings are lower due to HMLP rate; careful loan sizing is important.
Upfront
$0
Monthly
Fixed ~$0.10-0.14/kWh
25-yr Savings
~$15-25K
Ownership
Third party owns
Third-party owner claims Section 48 ITC. PPA rate must beat $0.18/kWh HMLP rate to provide savings. Smaller margin than Eversource towns.
Hingham's HMLP utility creates a distinctly different solar profile than neighboring Eversource towns.
| Town | Cost/W | Utility | Rate | SMART | Payback |
|---|---|---|---|---|---|
| Hingham | $3.10-3.45 | HMLP (muni) | $0.18 | No | 12-15 yrs |
| Cohasset | $3.10-3.45 | Eversource | $0.2836 | Yes | 7-8.5 yrs |
| Scituate | $3.05-3.40 | Eversource | $0.2836 | Yes | 7-8.5 yrs |
| Weymouth | $3.00-3.35 | Eversource | $0.2836 | Yes | 7-8 yrs |
| Hull | $3.05-3.40 | HMLP (muni) | ~$0.19 | No | 12-15 yrs |
Solar panels in Hingham cost $3.10-3.45 per watt installed in 2026. A typical 12.5 kW system costs $38,750-$43,125. The federal Section 25D residential tax credit expired December 31, 2025 -- homeowners receive $0 in federal credit. Hingham has a unique solar situation because it is served by HMLP (Hingham Municipal Lighting Plant), NOT Eversource. This means no SMART 3.0 and no ConnectedSolutions, but also lower electricity rates.
Hingham is served by HMLP (Hingham Municipal Lighting Plant), a municipal utility, not Eversource. This creates significant differences: HMLP charges ~$0.18/kWh (vs. Eversource at $0.2836/kWh), Hingham residents do NOT qualify for SMART 3.0 ($0.03/kWh production incentive), and Hingham residents do NOT qualify for ConnectedSolutions (battery demand response). Net metering terms are set by HMLP, not the state. The lower electric rate means longer payback periods, but the MA state tax credit, sales tax exemption, and property tax exemption still apply.
HMLP has its own net metering policy separate from Eversource. Municipal utilities in Massachusetts are not required to follow the same net metering rules as investor-owned utilities. Contact HMLP directly at (781) 749-0134 to confirm current net metering rates and terms before signing a solar contract. Some municipal utilities offer reduced credit rates or have interconnection caps.
It depends on your goals. Solar in Hingham has a longer payback period (12-15 years vs. 7-8.5 years for Eversource towns) because the lower HMLP rate ($0.18/kWh) means lower annual savings. However, with a 25+ year panel lifespan, Hingham homeowners still save approximately $68,000 over 25 years. The MA state tax credit ($1,000), sales tax exemption (~$2,559), and 20-year property tax exemption (~$531/yr) all still apply. For homeowners planning to stay long-term, solar remains a solid investment.
Hingham homeowners qualify for: the $1,000 MA state tax credit (15% of cost, capped), the 6.25% sales tax exemption (~$2,559 savings on a typical system), and the 20-year property tax exemption (~$531/year). What does NOT apply: SMART 3.0 (Eversource-territory only), ConnectedSolutions (Eversource/National Grid only). The PPA/lease option is still available since third-party owners can claim the Section 48/48E ITC.
Statewide pricing and incentive overview
Utility rate comparison for solar
Compare financing options for MA solar
Sales and property tax benefits
Nearby Eversource coastal town
Alternative for any utility territory
MLP customers are NOT eligible. See who qualifies.
MLP customers are NOT eligible for this demand response program.
Track rate changes across MA utilities and MLPs since 2020.
Live installation data, capacity trends, and market stats.
Current wait times and how MLP interconnection differs.
We understand the unique HMLP situation and will give you honest numbers based on your actual utility rate, not inflated Eversource-based projections. Let us show you exactly what solar saves for your Hingham home.