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Shrewsbury has 38,400 residents served by SELP (Shrewsbury Electric Light Plant) at ~$0.15/kWh -- about 45% less than National Grid. Lower rates mean longer solar payback. No SMART 3.0. No ConnectedSolutions. Here is the honest math.
SELP municipal utility • ~$0.15/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
Municipal Utility Notice: Shrewsbury is served by SELP (Shrewsbury Electric Light Plant), not National Grid or Eversource. Municipal utility customers are not eligible for SMART 3.0, ConnectedSolutions, or state-mandated net metering terms. This significantly changes the solar financial equation compared to neighboring Worcester.
A 12.5 kW system in Shrewsbury costs $36,250-$40,625 in 2026. With SELP rates at ~$0.15/kWh and no SMART income, annual savings are approximately $2,250/yr. Payback takes 14-18 years. Over 25 years, total savings are approximately $60,000.
Cost Range
$2.90-$3.25/W
Fully installed
Avg System
12.5 kW
Shrewsbury average
Payback
14-18 yrs
Cash purchase
25-Year Savings
~$60K
Estimated total value
Shrewsbury is a suburban town of ~38,400 residents in Worcester County, immediately east of Worcester. Known for excellent public schools, affordable housing relative to Greater Boston, and Lake Quinsigamond, the town has seen steady growth. Shrewsbury runs its own electric utility (SELP), providing some of the lowest electricity rates in the state.
Population
~38,400
Median Home Value
~$480,000
Primary Utility
SELP (Municipal)
Electric Rate
~$0.15/kWh
Typical System Size
11-15 kW
Solar Irradiance
4.1 kWh/m²/day
Shrewsbury and Worcester are neighbors with dramatically different solar economics. Here is a direct comparison.
| Factor | Shrewsbury (SELP) | Worcester (Nat Grid) |
|---|---|---|
| Electric Rate | ~$0.15/kWh | ~$0.32/kWh |
| Annual Savings (12.5 kW) | ~$2,250/yr | ~$4,050/yr |
| SMART 3.0 Income | Not eligible ($0) | ~$450/yr |
| ConnectedSolutions | Not eligible ($0) | ~$2,250-2,750/yr |
| Total Annual Value | ~$2,250/yr | ~$6,750-7,250/yr |
| Payback Period | 14-18 years | 8-10 years |
| 25-Year Savings | ~$60K | ~$115K+ |
Bottom line: Shrewsbury homeowners save roughly 70% less per year from solar compared to Worcester (National Grid) customers. Your SELP rate is great for daily electricity costs, but it significantly extends the solar payback period.
Costs for different system sizes in Shrewsbury at $2.90-3.25/W. Annual savings based on SELP rates (~$0.15/kWh). Shrewsbury homes tend to be slightly larger than average, with bigger systems.
| System Size | Low Cost | High Cost | Annual Savings | Best For |
|---|---|---|---|---|
| 7 kW | $20,300 | $22,750 | ~$1,260/yr | Condo / smaller home |
| 9 kW | $26,100 | $29,250 | ~$1,620/yr | Mid-size colonial / ranch |
| 12.5 kW | $36,250 | $40,625 | ~$2,250/yr | Typical Shrewsbury home |
| 15 kW | $43,500 | $48,750 | ~$2,700/yr | Large home / EV + battery |
| 18 kW | $52,200 | $58,500 | ~$3,240/yr | High usage / all-electric home |
Prices include equipment, labor, permits, and grid interconnection. No federal tax credit included (expired). $1,000 MA state tax credit not deducted. Annual savings based on SELP rates (~$0.15/kWh). No SMART income included.
Shrewsbury's neighborhoods vary from newer developments in the north to the Lake Quinsigamond shoreline in the east. All are served by SELP with the same rates.
Home Types
Newer colonials, garrison, contemporary
Avg System
13-16 kW
Newer residential development with larger homes and open lots. Less tree canopy, modern roof construction, and high energy usage. Best solar conditions in Shrewsbury. Standard installations.
Home Types
Colonials, Capes, Victorian, mixed ages
Avg System
10-13 kW
Central area near town common with mix of old and newer homes. Some mature trees but generally decent solar access. Close to schools and amenities. Roof age varies -- assessment recommended.
Home Types
Ranches, split-levels, Capes
Avg System
11-14 kW
Residential area south of Route 20 with 1960s-1980s homes. Good south-facing roof angles on many ranch-style homes. Moderate tree canopy. Near Worcester border with similar housing stock.
Home Types
Waterfront homes, cottages, mixed
Avg System
9-12 kW
Lakefront properties with mixed housing types. Some seasonal homes being converted to year-round. Tree canopy can be dense near the water. Waterfront properties may have good south exposure over the lake.
Solar is not for every Shrewsbury homeowner, but it can be a smart investment in the right circumstances.
You plan to stay in your home 15+ years
You want energy independence and resilience
You have high energy usage (EV, heat pump, pool)
You want to hedge against future SELP rate increases
Environmental impact matters to you
You can pay cash or get a low-APR loan (<5%)
You want to increase your property value
You only care about quick financial payback (<10 years)
You plan to move within 10 years
You would need a high-APR loan (7%+)
Your roof needs replacement in the next 5 years
Heavy tree shading from Lake Quinsigamond canopy
Shrewsbury's Building Department handles permits. SELP handles interconnection. Process typically takes 2-3 weeks.
Installer evaluates roof condition, shade, and orientation. SELP interconnection requirements reviewed.
Application to Shrewsbury Building Department. Electrical and structural plans. SELP interconnection application filed simultaneously.
Typical installation 1-3 days. Town electrical and building inspection.
SELP approves grid connection and activates metering. Municipal timeline varies -- confirm with SELP.
While SELP customers miss out on SMART 3.0 and ConnectedSolutions, you still qualify for state-level incentives.
SELP offers a form of net metering. Excess production credited against your bill. Contact SELP at (508) 841-8500 for current terms.
~$2,250/yr
Based on ~$0.15/kWh rate
15% of system cost, capped at $1,000. Available to all MA residents.
$1,000
One-time credit
Solar systems exempt from 6.25% MA sales tax. Available statewide.
~$2,402
Savings on typical system
Solar-added value exempt from property tax for 20 years. Shrewsbury has a 1.137% residential rate.
~$437/yr
20-year exemption (~$8,740 total)
Not available. SMART only applies to IOU customers.
$0/yr
Not eligible
Not available. ConnectedSolutions is Eversource/National Grid only.
$0/yr
Not eligible
Financing is critical in Shrewsbury because lower electricity savings mean loan payments often exceed monthly bill savings. Cash purchase is the strongest option.
Upfront
~$36,250-$40,625
Monthly
$0
25-yr Savings
~$60K
Ownership
You own it
Best long-term value but 14-18 year payback due to low SELP rates. Energy independence and rate-hedge are the primary drivers.
Upfront
$0 down
Monthly
~$245-345/mo (5.5-8% APR)
25-yr Savings
~$20-35K
Ownership
You own it
Caution: at SELP rates, monthly loan payments may exceed monthly electricity savings for 10+ years. A low-APR loan (<5%) is essential for positive cash flow.
Upfront
$0
Monthly
Fixed ~$0.10-0.13/kWh
25-yr Savings
~$10-20K
Ownership
Third party owns
PPA rate must undercut SELP rate (~$0.15/kWh) to generate savings. Narrow margin. Third-party owner claims Section 48 ITC.
Section 25D (the 30% residential solar tax credit) expired December 31, 2025 under the OBBBA. Shrewsbury homeowners buying cash or loan receive $0 in federal credit. Third-party system owners (PPA/lease) can still claim the commercial Section 48/48E ITC.
Read: What happened to the solar tax creditSolar panels in Shrewsbury cost $2.90-3.25 per watt installed in 2026. A typical 12.5 kW system costs $36,250-$40,625. The federal Section 25D residential tax credit expired December 31, 2025 -- homeowners receive $0 in federal credit. Shrewsbury Electric Light Plant (SELP) is a municipal utility, so SMART 3.0 and ConnectedSolutions are not available, which lengthens the payback period significantly.
Shrewsbury Electric Light Plant charges approximately $0.15/kWh -- about 37% less than National Grid's rates in Worcester. Lower rates mean lower annual savings from solar (about $2,250/yr vs $3,900+/yr for the same system in National Grid territory). Additionally, SELP customers are not eligible for SMART 3.0 (worth ~$450/yr for 12.5 kW) or ConnectedSolutions battery revenue ($2,250-$2,750/yr). The combined effect extends Shrewsbury payback to 14-18 years vs 8-10 years in National Grid territory.
No. Both programs are only available to customers of investor-owned utilities (Eversource, National Grid, Unitil). SELP is a municipal utility and does not participate. This is the single biggest financial difference between Shrewsbury and neighboring Worcester (National Grid).
It depends on your priorities. Financially, the payback is 14-18 years -- longer than National Grid towns but still within the 25-year panel warranty. Solar provides energy independence, protection against future SELP rate increases, property value boost, and environmental benefit. For homeowners planning to stay 15+ years, solar remains a reasonable investment. Over 25 years, a typical system saves approximately $60,000.
Worcester (National Grid, ~$0.32/kWh) has a dramatically better solar financial profile: 8-10 year payback, SMART 3.0 income, ConnectedSolutions eligibility, and state-mandated net metering. Shrewsbury residents enjoy lower electricity bills day-to-day, but the solar economics are notably weaker. If your primary motivation is financial, the numbers are honest: Shrewsbury solar takes roughly twice as long to pay for itself as Worcester solar.
We'll give you an honest assessment based on SELP rates -- not inflated numbers based on National Grid pricing. Get real Shrewsbury-specific solar savings.
Complete hub for MA solar, heat pumps, and utility resources.
Read moreStatewide solar costs and city-by-city breakdown.
Read moreNext door in National Grid territory. Different economics.
Read moreCash vs loan vs PPA. Critical for municipal utility customers.
Read moreHow to make solar work without the 25D credit.
Read moreSales + property tax exemptions still available.
Read more25D expired. What options remain for homeowners.
Read moreMLP customers are NOT eligible. See who qualifies.
Read moreMLP customers are NOT eligible for this demand response program.
Read moreHow IOU rates compare — and why MLP rates differ.
Read moreTrack rate changes across MA utilities and MLPs since 2020.
Read moreLive installation data, capacity trends, and market stats.
Read moreCurrent wait times and how MLP interconnection differs.
Read morePricing: EnergySage Solar Marketplace (January 2026), NuWatt Energy Central MA installations.
Utility rates: Shrewsbury Electric Light Plant (SELP) published rates, 2026.
Municipal utility policy: SELP interconnection guidelines, net metering policy.
SMART eligibility: MassDOER program rules -- municipal light plant customers excluded.
Tax exemptions: MA Department of Revenue, Shrewsbury Assessor data.