125 solar installers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Willimantic: Solarship Corp, CR Score 86/100; 5.0★ from 190 Google reviews; open 7 days a week.
Best for emergencies (open 24/7): Sunpol Solar, posts 24/7 hours; ranked #3 of 125.
Most-reviewed: Trinity Solar, 1,007 Google reviews at 4.5★, the most of 125 ranked; ranked #17.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
125 Willimantic solar installers are ranked here by CR Score, from 8 published factors. 11 are open 24/7, 70 open Saturdays and 32 open Sundays, based on posted hours. The median Google rating is 5.0★ across 125 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Solarship Corp | 86 | 5.0★ (190) | Bristol, 23 mi away | Sat · Sun · Evenings | Overall |
| 2 | Sunrun Solar | 86 | 4.9★ (287) | Cromwell, 24 mi away | Sat · Sun | — |
| 3 | Sunpol Solar | 84 | 4.9★ (39) | Newington, 27 mi away | 24/7 | Emergencies |
| 4 | Everlast Energy & Roofing | 84 | 5.0★ (242) | Manchester, 17 mi away | Sat | — |
| 5 | Premier Improvements Solar | 83 | 4.9★ (81) | West Hartford, 28 mi away | Sat · Sun · Evenings | — |
| 6 | Sol Power Solar | 82 | 4.8★ (123) | Charlestown, 33 mi away | Sat · Sun | — |
| 7 | Sun Path Energy | 82 | 5.0★ (27) | Cheshire, 39 mi away | 24/7 | — |
| 8 | ISP Solar Energy Company | 82 | 5.0★ (11) | Bristol, 29 mi away | 24/7 | — |
| 9 | Suntastic Solutions | 82 | 4.8★ (26) | Norwich, 14 mi away | — | — |
| 10 | DO IT RIGHT SOLAR | 81 | 5.0★ (208) | Hopkinton, 37 mi away | Sat · Evenings | — |
Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.
Ranked #1 because of its Google rating and trade focus: 5.0★ from 190 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Cromwell, 24 mi away
Ranked #2 because of its Google rating and trade focus: 4.9★ from 287 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Newington, 27 mi away
Ranked #3 because of its Google rating and availability: 4.9★ from 39 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Manchester, 17 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 on 6 of 8 factors; credentials and recency not yet collected.
Based in West Hartford, 28 mi away
Ranked #5 because of its Google rating and trade focus: 4.9★ from 81 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Charlestown, 33 mi away
Ranked #6 because of its Google rating and trade focus: 4.8★ from 123 Google reviews, listed on Google as “Solar energy system service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Cheshire, 39 mi away
Ranked #7 because of its Google rating and availability: 5.0★ from 27 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Bristol, 29 mi away
Ranked #8 because of its Google rating and availability: 5.0★ from 11 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Norwich, 14 mi away
Ranked #9 because of its Google rating and trade focus: 4.8★ from 26 Google reviews, listed on Google as “Solar energy company”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Hopkinton, 37 mi away
Ranked #10 because of its Google rating and trade focus: 5.0★ from 208 Google reviews, listed on Google as “Solar energy system service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Oakville, 32 mi away
Ranked #11 because of its Google rating and availability: 5.0★ from 10 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Warwick, 37 mi away
Ranked #12 because of its Google rating and availability: 5.0★ from 197 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Westfield, 39 mi away
Ranked #13 because of its Google rating and trade focus: 4.9★ from 294 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Johnston, 38 mi away
Ranked #14 because of its Google rating and availability: 4.8★ from 283 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Wallingford Center, 31 mi away
Ranked #15 because of its Google rating and trade focus: 4.8★ from 166 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in New Britain, 29 mi away
Ranked #16 because of its Google rating and trade focus: 5.0★ from 23 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Cheshire, 38 mi away
Ranked #17 because of its Google rating and review volume: 4.5★ from 1,007 Google reviews, the most Google reviews on this list (1,007).
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in West Hartford, 27 mi away
Ranked #18 because of its Google rating and trade focus: 5.0★ from 19 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Grafton, 39 mi away
Ranked #19 because of its Google rating and trade focus: 4.9★ from 35 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Cheshire Village, 29 mi away
Ranked #20 because of its Google rating and trade focus: 5.0★ from 53 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in New Britain, 30 mi away
Ranked #21 because of its Google rating and trade focus: 5.0★ from 37 Google reviews, listed on Google as “Solar energy company”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Farmington, 27 mi away
Ranked #22 because of its Google rating and trade focus: 3.9★ from 553 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Bristol, 32 mi away
Ranked #23 because of its Google rating and trade focus: 5.0★ from 23 Google reviews, listed on Google as “Solar energy company”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in City of Milford (balance), 32 mi away
Ranked #24 because of its Google rating and availability: 5.0★ from 5 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Cromwell, 22 mi away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 26 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
#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 125 ranked solar installers here; the rest are on their profiles.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | GM Industries, Inc | 78 | 3.5★ (15) | 15 mi |
| 27 | Momentum Solar Rhode Island | 78 | 4.5★ (46) | 39 mi |
| 28 | Trio Solar | 78 | 5.0★ (34) | 28 mi |
| 29 | Sunfinity Power | 77 | 4.9★ (65) | 37 mi |
| 30 | Rooftop Power | 77 | 4.8★ (810) | 37 mi |
| 31 | Longevity Solar Solutions | 77 | 4.6★ (7) | 27 mi |
| 32 | East HartFord Solar | 77 | 4.8★ (4) | 23 mi |
| 33 | KnowSolar.com | 77 | 5.0★ (20) | 26 mi |
| 34 | Trinity Solar | 77 | 4.4★ (339) | 40 mi |
| 35 | WethersField Solar | 77 | 4.5★ (4) | 24 mi |
| 36 | LUX Pwr | 77 | 5.0★ (7) | 32 mi |
| 37 | Mystic Solar, Inc. | 77 | 5.0★ (36) | 32 mi |
| 38 | ISP Solar Provider | 76 | 4.9★ (14) | 38 mi |
| 39 | CellSun Solar | 76 | 5.0★ (11) | 20 mi |
| 40 | SunVivo | 76 | 5.0★ (4) | 28 mi |
| 41 | Freedom Forever | 76 | 4.6★ (187) | 25 mi |
| 42 | The Solar RN™ | 76 | 5.0★ (27) | 33 mi |
| 43 | PosiGen Home Solar | 76 | 4.5★ (96) | 37 mi |
| 44 | Norwich Solar | 75 | 4.7★ (3) | 28 mi |
| 45 | Custom Solar Solutions LLC | 75 | 5.0★ (9) | 26 mi |
| 46 | Infinity Energy | 75 | 5.0★ (15) | 29 mi |
| 47 | Alpha Solar | 75 | 5.0★ (10) | 32 mi |
| 48 | Unity Energy | 75 | 5.0★ (13) | 32 mi |
| 49 | Roxaco Solar | 74 | 5.0★ (7) | 26 mi |
| 50 | Apollo Energy USA | 74 | 4.8★ (8) | 26 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) | 35 mi |
| Accredited Solar Advisors | 5.0★ (2) | 26 mi |
| Ascend Solar | 5.0★ (2) | 24 mi |
| Dcs Energy | 5.0★ (2) | 17 mi |
| Direct Energy Plan | 5.0★ (2) | 35 mi |
| Dyna, Inc. | 3.0★ (2) | 18 mi |
| EcoGen America | 5.0★ (2) | 24 mi |
| Last Stop Solar | 5.0★ (2) | 28 mi |
| Luminous Energy | 5.0★ (2) | 39 mi |
| Metro Sun Solar | 5.0★ (2) | 39 mi |
| MYSUNWORK LLC | 5.0★ (2) | 32 mi |
| New Britain Solar | 4.5★ (2) | 30 mi |
| Renewable Energy CT | 5.0★ (2) | 37 mi |
| Samaritan Solar | 5.0★ (2) | 35 mi |
| Solar Pros LLC | 3.0★ (2) | 32 mi |
| Solar Rays | 5.0★ (2) | 35 mi |
| Source Lumen | 5.0★ (2) | 32 mi |
| Sun Rhode Island Solar Alliance, LLC (SUNRISA) | 5.0★ (2) | 38 mi |
| Sunergy Solutions, LLC | 5.0★ (2) | 38 mi |
| Waldo Renewable Electric, LLC | 4.0★ (2) | 21 mi |
Typical prices in USD, adjusted for Connecticut 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 125 Willimantic 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 Willimantic 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 |