58 solar installers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Alton: Streib Company, CR Score 57/100; 4.9★ from 679 Google reviews; open 24/7.
Best for emergencies (open 24/7): Ltd Solar Consulting and Roofing, posts 24/7 hours; ranked #3 of 58.
Most-reviewed: Bates Electric, 1,366 Google reviews at 4.8★, the most of 58 ranked; ranked #5.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
58 Alton solar installers are ranked here by CR Score, from ten published factors. 8 are open 24/7, 26 open Saturdays and 9 open Sundays, based on posted hours. The median Google rating is 4.8★ across 58 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Streib Company | 57 | 4.9★ (679) | St. Louis, 25 mi away | 24/7 | Overall |
| 2 | Route 66 Solar | 57 | 4.9★ (119) | Edwardsville, 14 mi away | Evenings | — |
| 3 | Ltd Solar Consulting and Roofing | 56 | 5.0★ (10) | St. Louis, 22 mi away | 24/7 | Emergencies |
| 4 | SunSent Solar | 56 | 4.6★ (106) | Saint Charles, 20 mi away | Sat | — |
| 5 | Bates Electric | 56 | 4.8★ (1,366) | Arnold, 35 mi away | 24/7 | Most reviews |
| 6 | StraightUp Solar | 56 | 4.9★ (128) | St. Louis, 19 mi away | — | — |
| 7 | Astrawatt Solar | 56 | 4.7★ (47) | Olivette, 18 mi away | Sat · Evenings | — |
| 8 | Shinnova Home + Solar | 56 | 5.0★ (30) | Bridgeton, 17 mi away | Sat · Evenings | — |
| 9 | ARC - Solar Energy & Electric Services | 55 | 4.8★ (104) | Saint Charles, 17 mi away | — | — |
| 10 | ARF Solar LLC | 55 | 4.9★ (28) | East Alton, 6 mi away | — | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Ranked #1 because of its Google rating and review volume: 4.9★ from 679 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Edwardsville, 14 mi away
Ranked #2 because of its Google rating and trade focus: 4.9★ from 119 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in St. Louis, 22 mi away
Ranked #3 because of its Google rating and trade focus: 5.0★ from 10 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Saint Charles, 20 mi away
Ranked #4 because of its Google rating and trade focus: 4.6★ from 106 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Arnold, 35 mi away
Ranked #5 because of its Google rating and review volume: 4.8★ from 1,366 Google reviews, the most in Alton.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in St. Louis, 19 mi away
Ranked #6 because of its Google rating and trade focus: 4.9★ from 128 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Olivette, 18 mi away
Ranked #7 because of its Google rating and trade focus: 4.7★ from 47 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bridgeton, 17 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 on 8 of 10 factors; credentials and recency not yet collected.
Based in Saint Charles, 17 mi away
Ranked #9 because of its Google rating and trade focus: 4.8★ from 104 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in East Alton, 6 mi away
Ranked #10 because of its Google rating and trade focus: 4.9★ from 28 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Saint Charles, 18 mi away
Ranked #11 because of its Google rating and trade focus: 5.0★ from 7 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sappington, 27 mi away
Ranked #12 because of its Google rating and trade focus: 4.0★ from 8 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in East Saint Louis, 17 mi away
Ranked #13 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “Solar panel maintenance service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Edwardsville, 13 mi away
Ranked #14 because of its Google rating and trade focus: 4.2★ from 140 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Florissant, 11 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in East Saint Louis, 22 mi away
Ranked #16 because of its Google rating and trade focus: 4.6★ from 77 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Mascoutah, 31 mi away
Ranked #17 because of its Google rating and trade focus: 4.7★ from 117 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Saint Charles, 17 mi away
Ranked #18 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Saint Peters, 23 mi away
Ranked #19 because of its Google rating and trade focus: 5.0★ from 12 Google reviews, listed on Google as “Roofing contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Florissant, 7 mi away
Ranked #20 because of its Google rating and trade focus: 2.3★ from 3 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in St. Louis, 20 mi away
Ranked #21 because of its Google rating and trade focus: 4.4★ from 32 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in St. Louis, 21 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 15 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Highland, 28 mi away
Ranked #23 because of its Google rating and trade focus: 4.7★ from 14 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Ballwin, 28 mi away
Ranked #24 because of its Google rating and review volume: 4.9★ from 817 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Saint Peters, 24 mi away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “Solar energy company”.
Based on 7 of 10 factors; credentials, recency and availability 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 58 ranked solar installers here; the rest are on their profiles.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | Solar City STL | 51 | 4.0★ (20) | 27 mi |
| 27 | proSOLAR | 51 | 4.6★ (12) | 28 mi |
| 28 | All Around Tree Care Services LLC | 51 | 4.8★ (66) | 35 mi |
| 29 | Exceptional Electric | 51 | 4.9★ (381) | 25 mi |
| 30 | All Green Energy | 50 | 5.0★ (6) | 21 mi |
| 31 | SunSent Solar | 50 | 4.7★ (9) | 23 mi |
| 32 | AKA Solar LLC | 50 | 5.0★ (5) | 18 mi |
| 33 | Brda Electric | 50 | 4.9★ (154) | 20 mi |
| 34 | B-Raines Slate & Solar Roofing Co. | 50 | 4.4★ (19) | 19 mi |
| 35 | Solar Pals | 50 | 4.7★ (15) | 31 mi |
| 36 | Solar Luxury LLC | 50 | 5.0★ (11) | 18 mi |
| 37 | Exceptional Energy Solutions | 49 | 5.0★ (17) | 38 mi |
| 38 | Constructors 911 | 49 | 4.9★ (158) | 22 mi |
| 39 | RoofWorx - Wentzville | 49 | 5.0★ (61) | 38 mi |
| 40 | Resolute Energy Solutions | 49 | 5.0★ (6) | 39 mi |
| 41 | RoofTek | 49 | 4.9★ (28) | 18 mi |
| 42 | ECOcentrix | 49 | 5.0★ (60) | 18 mi |
| 43 | Valoa Solar | 49 | 3.7★ (3) | 22 mi |
| 44 | 3MG Roofing & Solar | 48 | 4.7★ (14) | 28 mi |
| 45 | Pyramid Electrical Contractors, Inc. | 48 | 3.5★ (24) | 23 mi |
| 46 | LVG Electrical & Communications | 48 | 4.9★ (75) | 25 mi |
| 47 | Day & Night Solar | 47 | 4.3★ (12) | 17 mi |
| 48 | Camp Electric + Engineering Inc. | 47 | 4.2★ (10) | In Alton |
| 49 | Skyline Roofing & Solar | 47 | 4.8★ (19) | 31 mi |
| 50 | Midwest Solar Solutions | 47 | 5.0★ (4) | 27 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 |
|---|---|---|
| American Patriot Solar | 5.0★ (1) | 18 mi |
| Andrews 2010 Solar Electric Company | 16 mi | |
| Azimuth Energy | 3.0★ (2) | 19 mi |
| Cardinal Roofing & Solar Solutions | 1.0★ (1) | 21 mi |
| Clean Credits | 6 mi | |
| Gardner Capital | 1.0★ (1) | 19 mi |
| GoSolar | 1.0★ (1) | 28 mi |
| Grandinetti Services LLC | 5.0★ (2) | 22 mi |
| Green Leaf Renewables | 10 mi | |
| Lafser & Associates, Inc. | 5.0★ (1) | 19 mi |
| Midamerica Solar LLC | 4.0★ (1) | 36 mi |
| Premier Energy Group | 5.0★ (1) | 13 mi |
| Roof Experts | 5.0★ (1) | 21 mi |
| Solar City STL Illinois | 5.0★ (1) | 26 mi |
| Solar University | 14 mi | |
| SolarIsland Energy | 5.0★ (1) | 18 mi |
| STL Solar Plus | 5.0★ (1) | 17 mi |
| Supreme Solar Cleaning | 5.0★ (1) | 20 mi |
| The Power Company | 1.0★ (1) | 23 mi |
| US Solar | 5.0★ (1) | 35 mi |
Typical prices in USD, adjusted for Illinois with a published regional index. Each row names its basis and month.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Solar panel installation | $26,020 | $29,430 | $32,010 | Per system: about 12 kW at about $2.60 per watt, before incentives. US national range × 0.95 East North Central factor (2025 Cost vs. Value Report) | October 2026 |
We scored 58 Alton 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 Alton 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 |