63 solar installers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Groton: Sunrun Solar, CR Score 85/100; 4.9★ from 287 Google reviews; open 7 days a week.
Best for emergencies (open 24/7): Home Solar CT, posts 24/7 hours; ranked #10 of 63.
Most-reviewed: Momentum Solar Connecticut, 553 Google reviews at 3.9★, the most of 63 ranked; ranked #13.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
63 Groton solar installers are ranked here by CR Score, from 8 published factors. 6 are open 24/7, 37 open Saturdays and 14 open Sundays, based on posted hours. The median Google rating is 5.0★ across 63 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Sunrun Solar | 85 | 4.9★ (287) | Cromwell, 37 mi away | Sat · Sun | Overall |
| 2 | Sol Power Solar | 85 | 4.8★ (123) | Charlestown, 21 mi away | Sat · Sun | — |
| 3 | Solarship Corp | 85 | 5.0★ (190) | Bristol, 37 mi away | Sat · Sun · Evenings | — |
| 4 | DO IT RIGHT SOLAR | 82 | 5.0★ (208) | Hopkinton, 34 mi away | Sat · Evenings | — |
| 5 | Mystic Solar, Inc. | 82 | 5.0★ (36) | Groton | Sat | — |
| 6 | Longevity Solar Solutions | 82 | 4.6★ (7) | Groton | Sat · Sun · Evenings | — |
| 7 | Everlast Energy & Roofing | 81 | 5.0★ (242) | Manchester, 38 mi away | Sat | — |
| 8 | Suntastic Solutions | 81 | 4.8★ (26) | Norwich, 18 mi away | — | — |
| 9 | Green Power Energy | 80 | 4.8★ (166) | Wallingford Center, 34 mi away | Sat · Evenings | — |
| 10 | Home Solar CT | 80 | 5.0★ (10) | Oakville, 37 mi away | 24/7 | Emergencies |
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: 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 Charlestown, 21 mi away
Ranked #2 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 Bristol, 37 mi away
Ranked #3 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 Hopkinton, 34 mi away
Ranked #4 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 Groton
Ranked #5 because of its Google rating and trade focus: 5.0★ from 36 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Groton
Ranked #6 because of its Google rating and trade focus: 4.6★ from 7 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Manchester, 38 mi away
Ranked #7 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 Norwich, 18 mi away
Ranked #8 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 Wallingford Center, 34 mi away
Ranked #9 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 Oakville, 37 mi away
Ranked #10 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 Calverton, 35 mi away
Ranked #11 because of its Google rating and trade focus: 4.8★ from 98 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Glastonbury Center, 37 mi away
Ranked #12 because of its Google rating and availability: 5.0★ from 4 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Farmington, 38 mi away
Ranked #13 because of its Google rating and review volume: 3.9★ from 553 Google reviews, the most Google reviews on this list (553).
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Bristol, 37 mi away
Ranked #14 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 Branford, 37 mi away
Ranked #15 because of its Google rating and availability: 5.0★ from 7 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Cheshire Village, 39 mi away
Ranked #16 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 City of Milford (balance), 37 mi away
Ranked #17 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, 35 mi away
Ranked #18 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.
Based in Farmington, 37 mi away
Ranked #19 because of its Google rating and trade focus: 5.0★ from 7 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Hampton Bays, 36 mi away
Ranked #20 because of its Google rating and trade focus: 4.9★ from 121 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Narragansett, 32 mi away
Ranked #21 because of its Google rating and trade focus: 4.8★ from 17 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Ansonia, 37 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 13 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Wethersfield, 39 mi away
Ranked #23 because of its Google rating and trade focus: 4.5★ from 4 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Cromwell, 37 mi away
Ranked #24 because of its Google rating and trade focus: 5.0★ from 10 Google reviews, listed on Google as “Solar energy company”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Wallingford Center, 37 mi away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 11 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 63 ranked solar installers here; the rest are on their profiles.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | CellSun Solar | 74 | 5.0★ (11) | 37 mi |
| 27 | Trinity Solar | 73 | 4.1★ (106) | 38 mi |
| 28 | AB Electric & Security LLC | 73 | 5.0★ (9) | 37 mi |
| 29 | Infinity Energy | 73 | 5.0★ (15) | 40 mi |
| 30 | RSR Residential | 73 | 5.0★ (49) | In Groton |
| 31 | Ion Solar - Connecticut | 73 | 4.2★ (33) | 40 mi |
| 32 | Omega Energy LLC | 72 | 5.0★ (35) | 37 mi |
| 33 | Synergy | 72 | 5.0★ (64) | 35 mi |
| 34 | Newport Solar | 72 | 5.0★ (101) | 36 mi |
| 35 | Son Energy Systems | 72 | 5.0★ (7) | 16 mi |
| 36 | Northeast Custom Solar | 72 | 4.6★ (11) | 37 mi |
| 37 | Suneye Solar LLC | 71 | 5.0★ (3) | 34 mi |
| 38 | One Source Energy Consultant | 71 | 5.0★ (20) | 34 mi |
| 39 | Aegis Solar Energy | 71 | 4.9★ (22) | 36 mi |
| 40 | Superior Solar LLC | 70 | 5.0★ (7) | 40 mi |
| 41 | Ametric Roofing & Solar | 70 | 5.0★ (16) | 37 mi |
| 42 | The Superior Group - Roofing Company | 69 | 4.9★ (17) | 2 mi |
| 43 | Solar Image | 68 | 5.0★ (7) | 37 mi |
| 44 | Sync Renewables | 68 | 5.0★ (5) | 33 mi |
| 45 | Premier Improvements | 68 | 5.0★ (4) | 38 mi |
| 46 | Rock-Vern Electric, Inc. | 67 | 4.5★ (30) | 40 mi |
| 47 | TKO Builders | 67 | 5.0★ (13) | 37 mi |
| 48 | EcoSmart Home Services | 67 | 4.2★ (56) | 38 mi |
| 49 | Tri Solar Energy | 67 | 2.3★ (6) | 35 mi |
| 50 | Burrington's Solar Edge | 67 | 3.7★ (3) | 37 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 |
|---|---|---|
| Ascend Solar | 5.0★ (2) | 37 mi |
| CT Solar Services | 5.0★ (1) | 37 mi |
| Dcs Energy | 5.0★ (2) | 37 mi |
| Dyna, Inc. | 3.0★ (2) | 39 mi |
| Dynamic Building & Energy Solutions | 4.6★ (16) | In Groton |
| Evergreen Solar Energy LLC | 5.0★ (1) | 33 mi |
| JRFsolarconsults | 5.0★ (1) | 13 mi |
| Metro Sun Solar | 5.0★ (2) | 33 mi |
| MYSUNWORK LLC | 5.0★ (2) | 37 mi |
| National Roofing and Solar Corporation | 5.0★ (1) | 32 mi |
| New London Solar | 4.0★ (1) | 1 mi |
| Renewable Energy CT | 5.0★ (2) | 30 mi |
| Setting Solar Standards | In Groton | |
| Smart Green Solar | 1.0★ (1) | 33 mi |
| Solar Pros LLC | 3.0★ (2) | 37 mi |
| Source Lumen | 5.0★ (2) | 37 mi |
| Sun Rhode Island Solar Alliance, LLC (SUNRISA) | 5.0★ (2) | 33 mi |
| Sunergy Solutions, LLC | 5.0★ (2) | 33 mi |
| Tesla Energy Connecticut - Solar Panel Installation | 5.0★ (1) | 37 mi |
| Waldo Renewable Electric, LLC | 4.0★ (2) | 29 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 63 Groton 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 Groton 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 |