40 solar installers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Union: Bates Electric, CR Score 56/100; 4.8★ from 1,366 Google reviews; open 24/7.
Best for emergencies (open 24/7): Streib Company, posts 24/7 hours; ranked #2 of 40.
Most-reviewed: Brda Electric, 817 Google reviews at 4.9★, the most of 40 ranked after Bates Electric; ranked #13.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
40 Union solar installers are ranked here by CR Score, from ten published factors. 5 are open 24/7, 18 open Saturdays and 5 open Sundays, based on posted hours. The median Google rating is 4.9★ across 40 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Bates Electric | 56 | 4.8★ (1,366) | Arnold, 34 mi away | 24/7 | Overall |
| 2 | Streib Company | 55 | 4.9★ (679) | St. Louis, 35 mi away | 24/7 | Emergencies |
| 3 | SunSent Solar | 54 | 4.6★ (106) | Saint Charles, 34 mi away | Sat | — |
| 4 | StraightUp Solar | 53 | 4.9★ (128) | St. Louis, 36 mi away | — | — |
| 5 | AMA ENERGY SOLUTIONS LLC | 53 | 4.0★ (8) | Sappington, 35 mi away | 24/7 | — |
| 6 | Shinnova Home + Solar | 53 | 5.0★ (30) | Bridgeton, 37 mi away | Sat · Evenings | — |
| 7 | Astrawatt Solar | 53 | 4.7★ (47) | Olivette, 37 mi away | Sat · Evenings | — |
| 8 | ARC - Solar Energy & Electric Services | 52 | 4.8★ (104) | Saint Charles, 38 mi away | — | — |
| 9 | Solar Alliance Mission | 52 | 5.0★ (7) | Saint Charles, 37 mi away | Sat · Sun · Evenings | — |
| 10 | Ram Roofing and Solar | 51 | 5.0★ (12) | Saint Peters, 31 mi away | 24/7 | — |
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: 4.8★ from 1,366 Google reviews, the most in Union.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in St. Louis, 35 mi away
Ranked #2 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 Saint Charles, 34 mi away
Ranked #3 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 St. Louis, 36 mi away
Ranked #4 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 Sappington, 35 mi away
Ranked #5 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 Bridgeton, 37 mi away
Ranked #6 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 Olivette, 37 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 Saint Charles, 38 mi away
Ranked #8 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 Saint Charles, 37 mi away
Ranked #9 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 Saint Peters, 31 mi away
Ranked #10 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 Wentzville, 26 mi away
Ranked #11 because of its Google rating and review volume: 5.0★ from 61 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Ballwin, 31 mi away
Ranked #12 because of its Google rating and trade focus: 4.6★ from 12 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Ballwin, 31 mi away
Ranked #13 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, 31 mi away
Ranked #14 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.
Based in Barnhart, 32 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 17 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Lake Saint Louis, 28 mi away
Ranked #16 because of its Google rating and trade focus: 4.7★ 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 St. Louis, 36 mi away
Ranked #17 because of its Google rating and trade focus: 4.0★ from 20 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, 33 mi away
Ranked #18 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 Warrenton, 26 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 8 of 10 factors; credentials and recency not yet collected.
Based in St. Louis, 35 mi away
Ranked #20 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 Saint Charles, 39 mi away
Ranked #21 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 Kirkwood, 34 mi away
Ranked #22 because of its Google rating and review volume: 4.9★ from 381 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Chesterfield, 26 mi away
Ranked #23 because of its Google rating and trade focus: 4.7★ from 14 Google reviews, listed on Google as “Roofing contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Creve Coeur, 34 mi away
Ranked #24 because of its Google rating and trade focus: 5.0★ from 6 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Battlefield, 13 mi away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 24 Google reviews, listed on Google as “Window cleaning service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#1 to #25 are shown in full above. Here are #26 to #40, in CR Score order; each links to its profile.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | Solarize | 48 | 5.0★ (5) | 36 mi |
| 27 | AKA Solar LLC | 48 | 5.0★ (5) | 37 mi |
| 28 | Greenergy Solar and Generator | 47 | 2.7★ (7) | 19 mi |
| 29 | Valoa Solar | 47 | 3.7★ (3) | 34 mi |
| 30 | Solar Luxury LLC | 47 | 5.0★ (11) | 37 mi |
| 31 | Constructors 911 | 47 | 4.9★ (158) | 39 mi |
| 32 | B-Raines Slate & Solar Roofing Co. | 47 | 4.4★ (19) | 39 mi |
| 33 | five stars electric and solar LLC | 46 | 3.2★ (11) | 29 mi |
| 34 | RoofTek | 46 | 4.9★ (28) | 37 mi |
| 35 | RENAISSANCE Historic Exteriors | 46 | 4.8★ (39) | 28 mi |
| 36 | Skyline Roofing & Solar | 46 | 4.8★ (19) | 38 mi |
| 37 | Legacy Farm Solar | 46 | 2.6★ (10) | 28 mi |
| 38 | LVG Electrical & Communications | 45 | 4.9★ (75) | 40 mi |
| 39 | Cain Electric, Inc. | 45 | 5.0★ (3) | 10 mi |
| 40 | Exceptional Electric | 44 | 5.0★ (16) | 35 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 |
|---|---|---|
| Azimuth Energy | 3.0★ (2) | 39 mi |
| Cardinal Roofing & Solar Solutions | 1.0★ (1) | 40 mi |
| Commercial LED Corporation | 5.0★ (1) | 25 mi |
| Energy Pro-USA | 28 mi | |
| Excel Commercial Solar | 28 mi | |
| Gardner Capital | 1.0★ (1) | 39 mi |
| Go Solar St. Louis | 28 mi | |
| GoSolar | 1.0★ (1) | 26 mi |
| Grandinetti Services LLC | 5.0★ (2) | 34 mi |
| Midamerica Solar LLC | 4.0★ (1) | 32 mi |
| Missouri Solar Applications | 26 mi | |
| Roof Experts | 5.0★ (1) | 34 mi |
| Sho Me Solar | 22 mi | |
| Solana Solar | 28 mi | |
| Solar Assure | 28 mi | |
| Solar Generation MW | 35 mi | |
| St. Louis Solar Company | 36 mi | |
| STL Solar Plus | 5.0★ (1) | 38 mi |
| Storm Guard Roofing & Construction of SW St. Louis | In Union | |
| Wentzville Solar | 26 mi |
Typical prices in USD, adjusted for Missouri with a published regional index. Each row names its basis and month.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Solar panel installation | $26,570 | $30,060 | $32,700 | Per system: about 12 kW at about $2.60 per watt, before incentives. US national range × 0.97 West North Central factor (2025 Cost vs. Value Report) | October 2026 |
We scored 40 Union 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 Union 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 |