148 solar installers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Derby: Long Island Power Solutions, CR Score 60/100; 4.9★ from 791 Google reviews; open 7 days a week.
Best for emergencies (open 24/7): Freedom Power Solutions, posts 24/7 hours; ranked #2 of 148.
Most-reviewed: Trinity Solar, 1,007 Google reviews at 4.5★, the most of 148 ranked; ranked #3.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
148 Derby solar installers are ranked here by CR Score, from ten published factors. 16 are open 24/7, 88 open Saturdays and 54 open Sundays, based on posted hours. The median Google rating is 5.0★ across 148 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Long Island Power Solutions | 60 | 4.9★ (791) | Ronkonkoma, 36 mi away | Sat · Sun · Evenings | Overall |
| 2 | Freedom Power Solutions | 60 | 5.0★ (189) | West Hills, 32 mi away | 24/7 | Emergencies |
| 3 | Trinity Solar | 60 | 4.5★ (1,007) | Cheshire, 18 mi away | Sat · Evenings | Most reviews |
| 4 | Shoreline Solar | 60 | 5.0★ (67) | Hamden, 13 mi away | Sat · Sun · Evenings | — |
| 5 | Sunrun Solar | 59 | 4.9★ (287) | Cromwell, 31 mi away | Sat · Sun | — |
| 6 | SUNation Energy | 59 | 4.7★ (930) | Ronkonkoma, 37 mi away | Sat · Sun | — |
| 7 | iSP (Ion Solar Pros) | 59 | 4.9★ (332) | Middlebury, 15 mi away | Evenings | — |
| 8 | ISP Solar Energy Company | 59 | 5.0★ (30) | Darien, 14 mi away | 24/7 | — |
| 9 | Sun Path Energy | 59 | 5.0★ (27) | Cheshire, 16 mi away | 24/7 | — |
| 10 | Solarship Corp | 59 | 5.0★ (190) | Bristol, 34 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: 4.9★ from 791 Google reviews, listed on Google as “Solar energy company”.
Based in West Hills, 32 mi away
Ranked #2 because of its Google rating and trade focus: 5.0★ from 189 Google reviews, listed on Google as “Solar energy company”.
Based in Cheshire, 18 mi away
Ranked #3 because of its Google rating and review volume: 4.5★ from 1,007 Google reviews, the most in Derby.
Based in Hamden, 13 mi away
Ranked #4 because of its Google rating and trade focus: 5.0★ from 67 Google reviews, listed on Google as “Solar energy company”.
Based in Cromwell, 31 mi away
Ranked #5 because of its Google rating and trade focus: 4.9★ from 287 Google reviews, listed on Google as “Solar energy company”.
Based in Ronkonkoma, 37 mi away
Ranked #6 because of its Google rating and trade focus: 4.7★ from 930 Google reviews, listed on Google as “Solar energy company”.
Based in Middlebury, 15 mi away
Ranked #7 because of its Google rating and trade focus: 4.9★ from 332 Google reviews, listed on Google as “Solar energy company”.
Based in Darien, 14 mi away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 30 Google reviews, listed on Google as “Solar energy company”.
Based in Cheshire, 16 mi away
Ranked #9 because of its Google rating and trade focus: 5.0★ from 27 Google reviews, listed on Google as “Solar energy company”.
Based in Bristol, 34 mi away
Ranked #10 because of its Google rating and trade focus: 5.0★ from 190 Google reviews, listed on Google as “Solar energy company”.
Based in Centereach, 29 mi away
Ranked #11 because of its Google rating and trade focus: 4.7★ from 95 Google reviews, listed on Google as “Solar energy company”.
Based in Wallingford Center, 22 mi away
Ranked #12 because of its Google rating and trade focus: 4.8★ from 166 Google reviews, listed on Google as “Solar energy company”.
Based in North Haven, 12 mi away
Ranked #13 because of its Google rating and trade focus: 4.1★ from 183 Google reviews, listed on Google as “Solar energy company”.
Based in Bethel, 12 mi away
Ranked #14 because of its Google rating and trade focus: 4.9★ from 58 Google reviews, listed on Google as “Solar energy company”.
Based in West Haven, 6 mi away
Ranked #15 because of its Google rating and trade focus: 4.5★ from 84 Google reviews, listed on Google as “Solar energy company”.
Based in Hauppauge, 36 mi away
Ranked #16 because of its Google rating and trade focus: 5.0★ from 57 Google reviews, listed on Google as “Solar energy company”.
Based in Newington, 30 mi away
Ranked #17 because of its Google rating and trade focus: 4.9★ from 39 Google reviews, listed on Google as “Solar energy company”.
Based in Westport, 19 mi away
Ranked #18 because of its Google rating and trade focus: 4.9★ from 80 Google reviews, listed on Google as “Solar energy company”.
Based in Darien, 26 mi away
Ranked #19 because of its Google rating and trade focus: 4.7★ from 563 Google reviews, listed on Google as “Solar energy company”.
Based in Bridgeport, 10 mi away
Ranked #20 because of its Google rating and trade focus: 4.0★ from 337 Google reviews, listed on Google as “Solar energy company”.
Based in West Hartford, 35 mi away
Ranked #21 because of its Google rating and trade focus: 4.9★ from 81 Google reviews, listed on Google as “Solar energy company”.
Based in Calverton, 30 mi away
Ranked #22 because of its Google rating and review volume: 5.0★ from 270 Google reviews.
Based in Coram, 28 mi away
Ranked #23 because of its Google rating and trade focus: 5.0★ from 75 Google reviews, listed on Google as “Solar energy company”.
Based in Milford, 7 mi away
Ranked #24 because of its Google rating and trade focus: 4.6★ from 89 Google reviews, listed on Google as “Solar energy company”.
Based in Branford, 16 mi away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 7 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 148 ranked solar installers here; the rest are on their profiles.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | Home Solar CT | 56 | 5.0★ (10) | 21 mi |
| 27 | Momentum Solar Connecticut | 55 | 3.9★ (553) | 28 mi |
| 28 | LLK Solar | 55 | 5.0★ (4) | 3 mi |
| 29 | A1 Solar | 55 | 5.0★ (53) | 27 mi |
| 30 | JD Solar Solutions | 55 | 4.9★ (33) | 5 mi |
| 31 | Harbor Energy Solutions | 55 | 5.0★ (24) | 27 mi |
| 32 | Liberty Energy Solar Solutions | 55 | 5.0★ (42) | 35 mi |
| 33 | Mystic Solar, Inc. | 55 | 5.0★ (36) | 21 mi |
| 34 | Leviathan Solar | 55 | 4.9★ (46) | 36 mi |
| 35 | Kohler Roofing Solar & Construction | 54 | 5.0★ (12) | 7 mi |
| 36 | Helio Solar | 54 | 4.5★ (41) | 6 mi |
| 37 | Sol Choice, LLC | 54 | 5.0★ (23) | 21 mi |
| 38 | Go Solar with Sayles | 54 | 5.0★ (5) | 21 mi |
| 39 | SUNZER0 LLC | 54 | 5.0★ (23) | 30 mi |
| 40 | L & R Solar Panel Cleaning LLC | 54 | 5.0★ (37) | 29 mi |
| 41 | Element Energy Systems (E2SYS) | 54 | 4.8★ (98) | 36 mi |
| 42 | PurePoint Energy | 54 | 5.0★ (51) | 22 mi |
| 43 | Trinity Solar | 54 | 4.4★ (214) | 36 mi |
| 44 | ECOVOLT: Solar Energy | 54 | 5.0★ (6) | 28 mi |
| 45 | New England Solar Direct | 54 | 5.0★ (8) | 21 mi |
| 46 | Bright Light Energy | 54 | 4.9★ (76) | 40 mi |
| 47 | West Hartford Solar | 53 | 5.0★ (19) | 34 mi |
| 48 | LUX Pwr | 53 | 5.0★ (7) | 21 mi |
| 49 | Greenskies Clean Energy LLC | 53 | 4.6★ (34) | 13 mi |
| 50 | Solar Homes 360 | 53 | 4.7★ (15) | 9 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) | 32 mi |
| Build My Solar | 5.0★ (2) | 38 mi |
| CT SOLAR POWER, LLC | 5.0★ (1) | 3 mi |
| EcoGen America | 5.0★ (2) | 38 mi |
| Energy and Solar Unlimited | 5.0★ (1) | In Derby |
| Energy Resources USA dba JK Energy Solutions | 5.0★ (2) | 23 mi |
| Forever Roofing LLC | 4.0★ (2) | 20 mi |
| Last Stop Solar | 5.0★ (2) | 35 mi |
| Medford Solar Power | 5.0★ (2) | 35 mi |
| Metro Sun Solar | 5.0★ (2) | 20 mi |
| MYSUNWORK LLC | 5.0★ (2) | 21 mi |
| New Britain Solar | 4.5★ (2) | 29 mi |
| Norwalk Solar | 4.5★ (2) | 22 mi |
| Renewable Energy CT | 5.0★ (2) | 23 mi |
| SNS Electrical Services | 5.0★ (27) | In Derby |
| Solar Cleaning Pros | 5.0★ (1) | 2 mi |
| Solar Pros LLC | 3.0★ (2) | 21 mi |
| Solares Ceramic & Remodeling Services | 5.0★ (2) | 36 mi |
| Source Lumen | 5.0★ (2) | 21 mi |
| Star Power Solar | 5.0★ (2) | 38 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 148 Derby 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 Derby 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 |