178 solar installers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Northbridge: Boundless, Inc., CR Score 63/100; 4.8★ from 464 Google reviews; open 7 days a week.
Best for emergencies (open 24/7): Team Sunshine Construction, LLC., posts 24/7 hours; ranked #4 of 178.
Most-reviewed: Isaksen Solar, 591 Google reviews at 4.9★, the most of 178 ranked; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
178 Northbridge solar installers are ranked here by CR Score, from ten published factors. 21 are open 24/7, 103 open Saturdays and 49 open Sundays, based on posted hours. The median Google rating is 4.9★ across 178 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Boundless, Inc. | 63 | 4.8★ (464) | Marlborough, 13 mi away | Sat · Sun | Overall |
| 2 | Isaksen Solar | 60 | 4.9★ (591) | Fall River, 40 mi away | Sat · Sun · Evenings | Most reviews |
| 3 | Mark The Solar Expert | 60 | 4.9★ (35) | Grafton, 4 mi away | Sat · Sun · Evenings | — |
| 4 | Team Sunshine Construction, LLC. | 59 | 4.7★ (181) | Boston, 34 mi away | 24/7 | Emergencies |
| 5 | Sunrun Solar | 59 | 4.1★ (239) | Shrewsbury, 8 mi away | Sat · Sun | — |
| 6 | Sunrun Solar | 59 | 4.5★ (476) | Taunton, 30 mi away | Sat · Sun | — |
| 7 | Golden Group Roofing & Solar | 59 | 4.9★ (174) | Grafton, 9 mi away | Sat · Sun | — |
| 8 | Momentum Solar Massachusetts | 58 | 4.0★ (198) | Marlborough, 12 mi away | Sat · Sun · Evenings | — |
| 9 | OneGrid Energy Integration | 58 | 5.0★ (57) | Providence, 26 mi away | Sat · Sun · Evenings | — |
| 10 | NEC Electric & Solar | 58 | 5.0★ (115) | Needham, 23 mi away | 24/7 | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Ranked #1 because of its Google rating and trade focus: 4.8★ from 464 Google reviews, listed on Google as “Solar energy company”.
Based in Fall River, 40 mi away
Ranked #2 because of its Google rating and review volume: 4.9★ from 591 Google reviews, the most in Northbridge.
Based in Grafton, 4 mi away
Ranked #3 because of its Google rating and trade focus: 4.9★ from 35 Google reviews, listed on Google as “Solar energy company”.
Based in Boston, 34 mi away
Ranked #4 because of its Google rating and trade focus: 4.7★ from 181 Google reviews, listed on Google as “Solar energy system service”.
Based in Shrewsbury, 8 mi away
Ranked #5 because of its Google rating and trade focus: 4.1★ from 239 Google reviews, listed on Google as “Solar energy company”.
Based in Taunton, 30 mi away
Ranked #6 because of its Google rating and trade focus: 4.5★ from 476 Google reviews, listed on Google as “Solar energy company”.
Based in Grafton, 9 mi away
Ranked #7 because of its Google rating and review volume: 4.9★ from 174 Google reviews.
Based in Marlborough, 12 mi away
Ranked #8 because of its Google rating and trade focus: 4.0★ from 198 Google reviews, listed on Google as “Solar energy company”.
Based in Providence, 26 mi away
Ranked #9 because of its Google rating and trade focus: 5.0★ from 57 Google reviews, listed on Google as “Solar energy company”.
Based in Needham, 23 mi away
Ranked #10 because of its Google rating and review volume: 5.0★ from 115 Google reviews.
Based in Cumberland, 19 mi away
Ranked #11 because of its Google rating and review volume: 4.9★ from 354 Google reviews.
Based in Marlborough, 14 mi away
Ranked #12 because of its Google rating and review volume: 5.0★ from 164 Google reviews.
Based in Hopkinton, 39 mi away
Ranked #13 because of its Google rating and trade focus: 5.0★ from 208 Google reviews, listed on Google as “Solar energy system service”.
Based in Billerica, 33 mi away
Ranked #14 because of its Google rating and trade focus: 4.4★ from 276 Google reviews, listed on Google as “Solar energy company”.
Based in Athol, 35 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 30 Google reviews, listed on Google as “Solar energy company”.
Based in East Greenwich, 11 mi away
Ranked #16 because of its Google rating and trade focus: 5.0★ from 27 Google reviews, listed on Google as “Solar energy company”.
Based in Providence, 27 mi away
Ranked #17 because of its Google rating and review volume: 5.0★ from 254 Google reviews.
Based in Valley Falls, 17 mi away
Ranked #18 because of its Google rating and trade focus: 5.0★ from 32 Google reviews, listed on Google as “Solar energy company”.
Based in Johnston, 25 mi away
Ranked #19 because of its Google rating and review volume: 4.8★ from 283 Google reviews.
Based in Pawtucket, 24 mi away
Ranked #20 because of its Google rating and trade focus: 5.0★ from 18 Google reviews, listed on Google as “Solar energy company”.
Based in Warwick, 30 mi away
Ranked #21 because of its Google rating and review volume: 5.0★ from 197 Google reviews.
Based in Stoughton, 29 mi away
Ranked #22 because of its Google rating and review volume: 5.0★ from 139 Google reviews.
Based in Pawtucket, 23 mi away
Ranked #23 because of its Google rating and trade focus: 5.0★ from 11 Google reviews, listed on Google as “Solar energy company”.
Based in Medford, 34 mi away
Ranked #24 because of its Google rating and review volume: 5.0★ from 123 Google reviews.
Based in Boston, 34 mi away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “Solar energy company”.
Typical prices in USD, adjusted for Massachusetts with a published regional index. Each row names its basis and month.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Solar panel installation | $28,990 | $32,790 | $35,670 | Per system: about 12 kW at about $2.60 per watt, before incentives. US national range × 1.05 New England factor (2025 Cost vs. Value Report) | October 2026 |
We scored 178 Northbridge solar installers on ten factors, weighted as shown. A business is ranked when its trade is confirmed and it has 3 or more Google reviews or a claimed profile. A business with no Google reviews scores zero on rating, review volume and recency. Other unknown factors are left out, not counted as zero. Scores last refreshed October 22, 2026.
Paid placement never changes a rank or score. Featured businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.
| Factor | Weight | Computed from | In Northbridge data |
|---|---|---|---|
| Reputation | 25% | Google star rating, adjusted for how many reviews back it | Measured |
| Credentials | 15% | Active state license, bond and workers’ comp on file | Not yet collected |
| Review volume | 10% | Number of Google reviews, compared with the most-reviewed business on the list | Measured |
| Recency | 5% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 5% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | How clearly the business does this trade (its Google category and name) | Measured |
| Proximity | 5% | Based in the city scores highest, less the farther away it is | Measured |
| Claimed profile | 10% | The business has claimed its ContractorsRanked profile (free or paid earn the same) | Measured |
| Partnered | 5% | The business links to ContractorsRanked from its own website with our badge, checked periodically | Measured |
| ContractorsRanked reviews | 10% | Verified customer reviews collected by ContractorsRanked: their rating and how many there are | Measured |