188 solar installers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Mendon: Boundless, Inc., CR Score 85/100; 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 #2 of 188.
Most-reviewed: Neeeco, 3,580 Google reviews at 4.9★, the most of 188 ranked; ranked #50.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
188 Mendon solar installers are ranked here by CR Score, from 8 published factors. 21 are open 24/7, 108 open Saturdays and 50 open Sundays, based on posted hours. The median Google rating is 4.9★ across 188 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Boundless, Inc. | 85 | 4.8★ (464) | Marlborough, 16 mi away | Sat · Sun | Overall |
| 2 | Team Sunshine Construction, LLC. | 85 | 4.7★ (181) | Boston, 31 mi away | 24/7 | Emergencies |
| 3 | Isaksen Solar | 84 | 4.9★ (591) | Fall River, 34 mi away | Sat · Sun · Evenings | — |
| 4 | NEC Electric & Solar | 84 | 5.0★ (115) | Needham, 20 mi away | 24/7 | — |
| 5 | Mark The Solar Expert | 84 | 4.9★ (35) | Grafton, 6 mi away | Sat · Sun · Evenings | — |
| 6 | Shamrock Well and Pump LLC | 84 | 4.9★ (354) | Cumberland, 13 mi away | 24/7 | — |
| 7 | OneGrid Energy Integration | 83 | 5.0★ (57) | Providence, 21 mi away | Sat · Sun · Evenings | — |
| 8 | Skyview Exteriors | 82 | 5.0★ (254) | Providence, 22 mi away | 24/7 | — |
| 9 | Sunrun Solar | 82 | 4.5★ (476) | Taunton, 24 mi away | Sat · Sun | — |
| 10 | Golden Group Roofing & Solar | 82 | 4.9★ (174) | Grafton, 13 mi away | Sat · Sun | — |
Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.
Scores below: based on 6 of 8 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 Boston, 31 mi away
Ranked #2 because of its Google rating and availability: 4.7★ from 181 Google reviews, open 24/7.
Based in Fall River, 34 mi away
Ranked #3 because of its Google rating and trade focus: 4.9★ from 591 Google reviews, listed on Google as “Solar energy company”.
Based in Needham, 20 mi away
Ranked #4 because of its Google rating and availability: 5.0★ from 115 Google reviews, open 24/7.
Based in Grafton, 6 mi away
Ranked #5 because of its Google rating and trade focus: 4.9★ from 35 Google reviews, listed on Google as “Solar energy company”.
Based in Cumberland, 13 mi away
Ranked #6 because of its Google rating and availability: 4.9★ from 354 Google reviews, open 24/7.
Based in Providence, 21 mi away
Ranked #7 because of its Google rating and trade focus: 5.0★ from 57 Google reviews, listed on Google as “Solar energy company”.
Based in Providence, 22 mi away
Ranked #8 because of its Google rating and availability: 5.0★ from 254 Google reviews, open 24/7.
Based in Taunton, 24 mi away
Ranked #9 because of its Google rating and trade focus: 4.5★ from 476 Google reviews, listed on Google as “Solar energy company”.
Based in Grafton, 13 mi away
Ranked #10 because of its Google rating and availability: 4.9★ from 174 Google reviews, open 7 days a week.
Based in Warwick, 26 mi away
Ranked #11 because of its Google rating and availability: 5.0★ from 197 Google reviews, open 24/7.
Based in Johnston, 21 mi away
Ranked #12 because of its Google rating and availability: 4.8★ from 283 Google reviews, open 24/7.
Based in Marlborough, 16 mi away
Ranked #13 because of its Google rating and availability: 5.0★ from 164 Google reviews, open 24/7.
Based in Stoughton, 24 mi away
Ranked #14 because of its Google rating and availability: 5.0★ from 139 Google reviews, open 24/7.
Based in Pawtucket, 18 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 18 Google reviews, listed on Google as “Solar energy company”.
Based in Cohasset, 39 mi away
Ranked #16 because of its Google rating and availability: 5.0★ from 14 Google reviews, open 24/7.
Based in Shrewsbury, 13 mi away
Ranked #17 because of its Google rating and trade focus: 4.1★ from 239 Google reviews, listed on Google as “Solar energy company”.
Based in Pawtucket, 17 mi away
Ranked #18 because of its Google rating and trade focus: 5.0★ from 11 Google reviews, listed on Google as “Solar energy company”.
Based in Boston, 31 mi away
Ranked #19 because of its Google rating and availability: 5.0★ from 5 Google reviews, open 24/7.
Based in Hopkinton, 35 mi away
Ranked #20 because of its Google rating and trade focus: 5.0★ from 208 Google reviews, listed on Google as “Solar energy system service”.
Based in Valley Falls, 12 mi away
Ranked #21 because of its Google rating and trade focus: 5.0★ from 32 Google reviews, listed on Google as “Solar energy company”.
Based in Johnston, 19 mi away
Ranked #22 because of its Google rating and trade focus: 4.9★ from 65 Google reviews, listed on Google as “Solar energy company”.
Based in Medford, 32 mi away
Ranked #23 because of its Google rating and availability: 5.0★ from 123 Google reviews, open 24/7.
Based in Warwick, 26 mi away
Ranked #24 because of its Google rating and trade focus: 4.5★ from 46 Google reviews, listed on Google as “Solar energy company”.
Based in Billerica, 33 mi away
Ranked #25 because of its Google rating and trade focus: 4.4★ from 276 Google reviews, listed on Google as “Solar energy company”.
#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 188 ranked solar installers here; the rest are on their profiles.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | The Solar RN™ | 79 | 5.0★ (27) | 10 mi |
| 27 | Momentum Solar Massachusetts | 79 | 4.0★ (198) | 15 mi |
| 28 | Empire Energy | 79 | 5.0★ (62) | 23 mi |
| 29 | ComfortMax Energy Solutions | 79 | 5.0★ (109) | 14 mi |
| 30 | New England Solar Initiative | 79 | 5.0★ (13) | 8 mi |
| 31 | Great Sky Solar | 79 | 5.0★ (468) | 29 mi |
| 32 | Luminous Energy | 78 | 4.5★ (8) | 21 mi |
| 33 | Better Future Solar Water | 78 | 5.0★ (16) | 12 mi |
| 34 | Summit Energy | 78 | 4.7★ (824) | 17 mi |
| 35 | Sun Team | 78 | 4.9★ (18) | 33 mi |
| 36 | Clean Solar Energy - Massachusetts | 78 | 5.0★ (23) | 37 mi |
| 37 | Powersol Solutions | 78 | 5.0★ (12) | 30 mi |
| 38 | KnowSolar.com | 78 | 5.0★ (20) | 18 mi |
| 39 | Timothy Santos Electric | 78 | 5.0★ (100) | 39 mi |
| 40 | Everest Solar | 78 | 5.0★ (14) | 35 mi |
| 41 | Evergreen Solar | 78 | 4.8★ (305) | 18 mi |
| 42 | EnergySage | 78 | 4.8★ (1,027) | 31 mi |
| 43 | Nexis Power LLC | 77 | 5.0★ (62) | 35 mi |
| 44 | Rooftop Power | 77 | 4.8★ (810) | 26 mi |
| 45 | Gopower llc | 77 | 5.0★ (24) | 23 mi |
| 46 | Mass Energy Savers | 77 | 4.5★ (8) | 8 mi |
| 47 | Proto Home Service Plumbing Heating & Cooling | 77 | 5.0★ (25) | 26 mi |
| 48 | Liddell Solar | 77 | 5.0★ (27) | 26 mi |
| 49 | New England Solar Hot Water | 77 | 4.9★ (28) | 23 mi |
| 50 | Neeeco | 77 | 4.9★ (3,580) | 39 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) | 8 mi |
| Accredited Solar Advisors | 5.0★ (2) | 18 mi |
| Alex Valley Electrician | 5.0★ (2) | 37 mi |
| Bright Lite Energy | 3.0★ (2) | 26 mi |
| Devlin Contracting | 5.0★ (2) | 32 mi |
| Direct Energy Plan | 5.0★ (2) | 8 mi |
| Go Solar | 5.0★ (2) | 35 mi |
| iSP (Ion Solar Pros) | 5.0★ (2) | 7 mi |
| LastMile Energy, LLC | 5.0★ (2) | 21 mi |
| Love Solar Energy Services | 3.0★ (2) | 25 mi |
| Navisun LLC | 3.0★ (2) | 34 mi |
| NEC Solar | 5.0★ (2) | 22 mi |
| Relay Power | 4.0★ (2) | 20 mi |
| Solar By Jake | 4.5★ (2) | 6 mi |
| Solar Powered by Mario's | 5.0★ (2) | 23 mi |
| Solar Rays | 5.0★ (2) | 8 mi |
| Sun Diagnostics Company | 5.0★ (2) | 32 mi |
| Tesla Solar | 3.0★ (2) | 29 mi |
| US SolarWorks | 5.0★ (2) | 17 mi |
| Waldo Renewable Electric, LLC | 4.0★ (2) | 30 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 188 Mendon solar installers on 8 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. Unknown factors are left out of the score, 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 Mendon data |
|---|---|---|---|
| Reputation | 35% | Bayesian-adjusted Google star rating | Measured |
| Credentials | 15% | Active state license 0.6, bond 0.2, workers’ comp 0.2 | Not yet collected |
| Review volume | 10% | log10(reviews + 1) against the list maximum | Measured |
| Recency | 10% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 10% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | Google main category 1.0, business name 0.7, additional category 0.5 | Measured |
| Proximity | 5% | 1.0 when based in the city, falling to 0 at the trade’s radius | Measured |
| Completeness | 5% | Website, photos, description, hours, claimed profile (0.2 each) | Measured |