120 solar installers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Charlton: Boundless, Inc., CR Score 61/100; 4.8★ from 464 Google reviews; open 7 days a week.
Best for emergencies (open 24/7): Old Glory Solar, posts 24/7 hours; ranked #5 of 120.
Most-reviewed: Summit Energy, 824 Google reviews at 4.7★, the most of 120 ranked; ranked #11.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
120 Charlton solar installers are ranked here by CR Score, from ten published factors. 11 are open 24/7, 63 open Saturdays and 29 open Sundays, based on posted hours. The median Google rating is 4.9★ across 120 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Boundless, Inc. | 61 | 4.8★ (464) | Marlborough, 24 mi away | Sat · Sun | Overall |
| 2 | Mark The Solar Expert | 58 | 4.9★ (35) | Grafton, 16 mi away | Sat · Sun · Evenings | — |
| 3 | Sunrun Solar | 57 | 4.1★ (239) | Shrewsbury, 17 mi away | Sat · Sun | — |
| 4 | Everlast Energy & Roofing | 57 | 5.0★ (242) | Manchester, 36 mi away | Sat | — |
| 5 | Old Glory Solar | 57 | 5.0★ (30) | Athol, 30 mi away | 24/7 | Emergencies |
| 6 | All Energy Solar | 57 | 4.9★ (294) | Westfield, 39 mi away | Sat | — |
| 7 | Golden Group Roofing & Solar | 57 | 4.9★ (174) | Grafton, 20 mi away | Sat · Sun | — |
| 8 | Lunex Power | 56 | 4.7★ (100) | Worcester, 13 mi away | Evenings | — |
| 9 | Rooftop Power | 56 | 4.8★ (810) | Warwick, 38 mi away | — | — |
| 10 | OneGrid Energy Integration | 56 | 5.0★ (57) | Providence, 36 mi away | Sat · Sun · Evenings | — |
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 Grafton, 16 mi away
Ranked #2 because of its Google rating and trade focus: 4.9★ from 35 Google reviews, listed on Google as “Solar energy company”.
Based in Shrewsbury, 17 mi away
Ranked #3 because of its Google rating and trade focus: 4.1★ from 239 Google reviews, listed on Google as “Solar energy company”.
Based in Manchester, 36 mi away
Ranked #4 because of its Google rating and trade focus: 5.0★ from 242 Google reviews, listed on Google as “Solar energy company”.
Based in Athol, 30 mi away
Ranked #5 because of its Google rating and trade focus: 5.0★ from 30 Google reviews, listed on Google as “Solar energy company”.
Based in Westfield, 39 mi away
Ranked #6 because of its Google rating and trade focus: 4.9★ from 294 Google reviews, listed on Google as “Solar energy company”.
Based in Grafton, 20 mi away
Ranked #7 because of its Google rating and review volume: 4.9★ from 174 Google reviews.
Based in Worcester, 13 mi away
Ranked #8 because of its Google rating and trade focus: 4.7★ from 100 Google reviews, listed on Google as “Solar energy company”.
Based in Warwick, 38 mi away
Ranked #9 because of its Google rating and trade focus: 4.8★ from 810 Google reviews, listed on Google as “Solar energy company”.
Based in Providence, 36 mi away
Ranked #10 because of its Google rating and trade focus: 5.0★ from 57 Google reviews, listed on Google as “Solar energy company”.
Based in Mansfield, 38 mi away
Ranked #11 because of its Google rating and review volume: 4.7★ from 824 Google reviews, the most in Charlton.
Based in Marlborough, 24 mi away
Ranked #12 because of its Google rating and trade focus: 4.0★ from 198 Google reviews, listed on Google as “Solar energy company”.
Based in Holyoke, 33 mi away
Ranked #13 because of its Google rating and trade focus: 4.4★ from 339 Google reviews, listed on Google as “Solar energy company”.
Based in East Greenwich, 18 mi away
Ranked #14 because of its Google rating and trade focus: 5.0★ from 27 Google reviews, listed on Google as “Solar energy company”.
Based in Cumberland, 32 mi away
Ranked #15 because of its Google rating and review volume: 4.9★ from 354 Google reviews.
Based in Marlborough, 26 mi away
Ranked #16 because of its Google rating and review volume: 5.0★ from 164 Google reviews.
Based in Pawtucket, 35 mi away
Ranked #17 because of its Google rating and trade focus: 4.8★ from 305 Google reviews, listed on Google as “Solar energy company”.
Based in Seekonk, 18 mi away
Ranked #18 because of its Google rating and trade focus: 5.0★ from 20 Google reviews, listed on Google as “Solar energy company”.
Based in Johnston, 32 mi away
Ranked #19 because of its Google rating and trade focus: 4.9★ from 65 Google reviews, listed on Google as “Solar energy company”.
Based in Needham, 39 mi away
Ranked #20 because of its Google rating and review volume: 5.0★ from 115 Google reviews.
Based in Marlborough, 26 mi away
Ranked #21 because of its Google rating and trade focus: 4.9★ from 100 Google reviews, listed on Google as “Solar energy company”.
Based in Braintree, 16 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 41 Google reviews, listed on Google as “Solar energy company”.
Based in Easthampton, 37 mi away
Ranked #23 because of its Google rating and trade focus: 4.9★ from 201 Google reviews, listed on Google as “Solar energy system service”.
Based in Ludlow, 28 mi away
Ranked #24 because of its Google rating and trade focus: 4.5★ from 96 Google reviews, listed on Google as “Solar energy company”.
Based in Providence, 36 mi away
Ranked #25 because of its Google rating and review volume: 5.0★ from 254 Google reviews.
#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile. We publish the top 50 of 120 ranked solar installers here; the rest are on their profiles.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | New England Solar Initiative | 54 | 5.0★ (13) | 16 mi |
| 27 | QSPS Housing Solutions | 54 | 4.8★ (283) | 33 mi |
| 28 | Liddell Solar | 54 | 5.0★ (27) | 28 mi |
| 29 | Empire Energy | 54 | 5.0★ (62) | 39 mi |
| 30 | RTP Roofing | 54 | 5.0★ (197) | 38 mi |
| 31 | Avid Solar LLC | 54 | 4.6★ (9) | 23 mi |
| 32 | Trio Solar | 54 | 5.0★ (34) | 34 mi |
| 33 | Sun Team | 54 | 4.9★ (18) | 34 mi |
| 34 | The Solar Guys | 54 | 5.0★ (32) | 34 mi |
| 35 | Momentum Solar Rhode Island | 54 | 4.5★ (46) | 39 mi |
| 36 | GoGreen with Glenn – Solar & Battery Backup | 53 | 5.0★ (18) | 36 mi |
| 37 | Custom Solar Solutions LLC | 53 | 5.0★ (9) | 18 mi |
| 38 | Northeast Solar | 53 | 5.0★ (94) | 37 mi |
| 39 | Freedom Forever | 53 | 4.6★ (187) | 36 mi |
| 40 | Apollo Energy USA | 53 | 4.8★ (8) | 18 mi |
| 41 | GM Industries, Inc | 53 | 3.5★ (15) | 23 mi |
| 42 | Roxaco Solar | 53 | 5.0★ (7) | 18 mi |
| 43 | Mass Energy Savers | 53 | 4.5★ (8) | 16 mi |
| 44 | Golden Group Roofing & Solar | 53 | 5.0★ (105) | 27 mi |
| 45 | Insight Energy Systems - Insight Solar | 53 | 4.8★ (115) | 37 mi |
| 46 | AG Electric & Solar | 53 | 5.0★ (11) | 34 mi |
| 47 | Al & son's LLC | 53 | 5.0★ (11) | 13 mi |
| 48 | Solar Medix - Solar Maintenance | 53 | 5.0★ (26) | 24 mi |
| 49 | Sunwatt Solar | 53 | 4.9★ (79) | 35 mi |
| 50 | SGE Solar - Second Generation Energy | 53 | 4.7★ (35) | 23 mi |
20 more solar installers within 40 mi that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.
| Business | Google rating | Distance |
|---|---|---|
| 777 Smart Solar & Cleaning | 5.0★ (2) | 16 mi |
| Accredited Solar Advisors | 5.0★ (2) | 18 mi |
| Alex Valley Electrician | 5.0★ (2) | 24 mi |
| Brad Carmody Solar Consultant | 5.0★ (1) | 16 mi |
| Dcs Energy | 5.0★ (2) | 39 mi |
| Direct Energy Plan | 5.0★ (2) | 16 mi |
| Dyna, Inc. | 3.0★ (2) | 38 mi |
| Edison Energy Consultants LLC | 5.0★ (2) | 36 mi |
| Green Earth Energy Photovoltaic | 5.0★ (1) | 18 mi |
| iSP (Ion Solar Pros) | 5.0★ (2) | 22 mi |
| Luminous Energy | 5.0★ (2) | 34 mi |
| NEC Solar | 5.0★ (2) | 39 mi |
| Relay Power | 4.0★ (2) | 28 mi |
| Samaritan Solar | 5.0★ (2) | 16 mi |
| Solar By Jake | 4.5★ (2) | 24 mi |
| Solar Rays | 5.0★ (2) | 16 mi |
| Sun Diagnostics Company | 5.0★ (2) | 40 mi |
| SunRun Inc | 5.0★ (1) | 13 mi |
| US SolarWorks | 5.0★ (2) | 37 mi |
| Waldo Renewable Electric, LLC | 4.0★ (2) | 31 mi |
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 120 Charlton 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 Charlton 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 |