57/100CR Score
Ranked #1 because of its Google rating and review volume: 4.8★ from 1,366 Google reviews, the most in O'Fallon.
- 4.8★ from 1,366 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2006 Sierra Pkwy, Arnold, MO 63010
Best Solar Installers in O'Fallon, IL (2026)
55 solar installers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in O'Fallon: Bates Electric, CR Score 57/100; 4.8★ from 1,366 Google reviews; open 24/7.
- 3
Best for emergencies (open 24/7): Streib Company, posts 24/7 hours; ranked #3 of 55.
- 21
Most-reviewed: Brda Electric, 817 Google reviews at 4.9★, the most of 55 ranked after Bates Electric; ranked #21.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
55 O'Fallon solar installers are ranked here by CR Score, from ten published factors. 7 are open 24/7, 24 open Saturdays and 9 open Sundays, based on posted hours. The median Google rating is 4.9★ across 55 rated businesses.
Most of this list also appears on the Solar installers in Belleville ranking. See Solar installers in Belleville
Top 10 solar installers in O'Fallon at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Bates Electric | 57 | 4.8★ (1,366) | Arnold, 29 mi away | 24/7 | Overall |
| 2 | Freedom Forever | 57 | 4.7★ (117) | Mascoutah, 6 mi away | — | — |
| 3 | Streib Company | 57 | 4.9★ (679) | St. Louis, 25 mi away | 24/7 | Emergencies |
| 4 | Route 66 Solar | 57 | 4.9★ (119) | Edwardsville, 14 mi away | Evenings | — |
| 5 | Ltd Solar Consulting and Roofing | 56 | 5.0★ (10) | St. Louis, 20 mi away | 24/7 | — |
| 6 | All Around Tree Care Services LLC | 55 | 4.8★ (66) | Mascoutah, 10 mi away | 24/7 | — |
| 7 | Sun Solar Illinois | 54 | 4.6★ (77) | East Saint Louis, 15 mi away | — | — |
| 8 | AMA ENERGY SOLUTIONS LLC | 54 | 4.0★ (8) | Sappington, 25 mi away | 24/7 | — |
| 9 | Astrawatt Solar | 54 | 4.7★ (47) | Olivette, 26 mi away | Sat · Evenings | — |
| 10 | StraightUp Solar | 54 | 4.9★ (128) | St. Louis, 29 mi away | — | — |
The 55 best solar installers in O'Fallon, ranked
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.
Based in Mascoutah, 6 mi away
57/100CR ScoreRanked #2 because of its Google rating and trade focus: 4.7★ from 117 Google reviews, listed on Google as “Solar energy company”.
- 4.7★ from 117 Google reviews
- Hours
- Mon–Fri 7 AM–4 PM · Sat–Sun closed
- Address
- 9237 Beller Dr Suite B, Mascoutah, IL 62258
Based in St. Louis, 25 mi away
57/100CR ScoreRanked #3 because of its Google rating and review volume: 4.9★ from 679 Google reviews.
- 4.9★ from 679 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 9225 Watson Industrial Park, St. Louis, MO 63126
Based in Edwardsville, 14 mi away
57/100CR ScoreRanked #4 because of its Google rating and trade focus: 4.9★ from 119 Google reviews, listed on Google as “Solar energy company”.
- 4.9★ from 119 Google reviews
- Hours
- Mon–Fri 10 AM–8 PM · Sat–Sun closed
- Address
- 2110 Troy Rd Suite B1, Edwardsville, IL 62025
Based in St. Louis, 20 mi away
56/100CR ScoreRanked #5 because of its Google rating and trade focus: 5.0★ from 10 Google reviews, listed on Google as “Solar energy company”.
- 5.0★ from 10 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 5850 Macklind Ave #245, St. Louis, MO 63109
Based in Mascoutah, 10 mi away
55/100CR ScoreRanked #6 because of its Google rating and review volume: 4.8★ from 66 Google reviews.
- 4.8★ from 66 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 516 S Jefferson St, Mascoutah, IL 62258
Based in East Saint Louis, 15 mi away
54/100CR ScoreRanked #7 because of its Google rating and trade focus: 4.6★ from 77 Google reviews, listed on Google as “Solar energy company”.
- 4.6★ from 77 Google reviews
- Hours
- Mon–Fri 9 AM–5 PM · Sat–Sun closed
- Address
- 11 Industrial Dr, Sauget, IL 62206
Based in Sappington, 25 mi away
54/100CR ScoreRanked #8 because of its Google rating and trade focus: 4.0★ from 8 Google reviews, listed on Google as “Solar energy company”.
- 4.0★ from 8 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1 Concord Ln, Sappington, MO 63128
Based in Olivette, 26 mi away
54/100CR ScoreRanked #9 because of its Google rating and trade focus: 4.7★ from 47 Google reviews, listed on Google as “Solar energy company”.
- 4.7★ from 47 Google reviews
- Hours
- Mon–Sat 7 AM–7 PM · Sun closed
- Address
- 9647 Dielman Rock Island Industrl Dr, Olivette, MO 63132
#10 StraightUp Solar
Based in St. Louis, 29 mi away
54/100CR ScoreRanked #10 because of its Google rating and trade focus: 4.9★ from 128 Google reviews, listed on Google as “Solar energy company”.
- 4.9★ from 128 Google reviews
- Hours
- Mon–Fri 9 AM–5 PM · Sat–Sun closed
- Address
- 11696 Lilburn Park Rd, St. Louis, MO 63146
#11 Solar R&R Kings
Based in East Saint Louis, 18 mi away
54/100CR ScoreRanked #11 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “Solar panel maintenance service”.
- 5.0★ from 4 Google reviews
- Hours
- Mon–Sun 9 AM–6 PM
#12 SunSent Solar
Based in Saint Charles, 35 mi away
54/100CR ScoreRanked #12 because of its Google rating and trade focus: 4.6★ from 106 Google reviews, listed on Google as “Solar energy company”.
- 4.6★ from 106 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat 9 AM–5 PM · Sun closed
- Address
- 1710 Scherer Pkwy, St Charles, MO 63303
#13 GRID LLC
Based in Highland, 17 mi away
53/100CR ScoreRanked #13 because of its Google rating and trade focus: 4.7★ from 14 Google reviews, listed on Google as “Solar energy company”.
- 4.7★ from 14 Google reviews
- Hours
- Mon–Fri 10 AM–6 PM · Sat 10 AM–3 PM · Sun closed
- Address
- 86 Memorial Ct, Highland, IL 62249
#14 eEquals Solar
Based in Edwardsville, 16 mi away
53/100CR ScoreRanked #14 because of its Google rating and trade focus: 4.2★ from 140 Google reviews, listed on Google as “Solar energy company”.
- 4.2★ from 140 Google reviews
- Hours
- Mon–Fri 9 AM–6 PM · Sat–Sun closed
- Address
- 201 Hillsboro Ave, Edwardsville, IL 62025
Based in Bridgeton, 32 mi away
53/100CR ScoreRanked #15 because of its Google rating and trade focus: 5.0★ from 30 Google reviews, listed on Google as “Solar energy company”.
- 5.0★ from 30 Google reviews
- Hours
- Mon–Fri 8:30 AM–7 PM · Sat 10 AM–4 PM · Sun closed
- Address
- 13730 Shoreline Ct E, Earth City, MO 63045
#16 SunSent Solar
Based in Fairview Heights, 4 mi away
53/100CR ScoreRanked #16 because of its Google rating and trade focus: 4.7★ from 9 Google reviews, listed on Google as “Solar energy company”.
- 4.7★ from 9 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat–Sun closed
- Address
- 134 St Clair Square Unit T-64, Fairview Heights, IL 62208
Based in Saint Charles, 34 mi away
53/100CR ScoreRanked #17 because of its Google rating and trade focus: 4.8★ from 104 Google reviews, listed on Google as “Solar energy company”.
- 4.8★ from 104 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat–Sun closed
- Address
- 201 Hughes Ln, St Charles, MO 63301
#18 ARF Solar LLC
Based in East Alton, 23 mi away
52/100CR ScoreRanked #18 because of its Google rating and trade focus: 4.9★ from 28 Google reviews, listed on Google as “Solar energy company”.
- 4.9★ from 28 Google reviews
- Hours
- Mon–Fri 8 AM–4 PM · Sat–Sun closed
- Address
- 326 W MacArthur Dr, Cottage Hills, IL 62018
Based in Saint Charles, 33 mi away
52/100CR ScoreRanked #19 because of its Google rating and trade focus: 5.0★ from 7 Google reviews, listed on Google as “Solar energy company”.
- 5.0★ from 7 Google reviews
- Hours
- Mon–Sun 9 AM–7 PM
- Address
- 119 S Main St, St Charles, MO 63301
#20 Solar City STL
Based in St. Louis, 25 mi away
52/100CR ScoreRanked #20 because of its Google rating and trade focus: 4.0★ from 20 Google reviews, listed on Google as “Solar energy company”.
- 4.0★ from 20 Google reviews
- Hours
- Mon–Fri 9 AM–7 PM · Sat 12 PM–4 PM · Sun closed
- Address
- 5526 S Lindbergh Blvd, St. Louis, MO 63123
#21 Brda Electric
Based in Ballwin, 30 mi away
51/100CR ScoreRanked #21 because of its Google rating and review volume: 4.9★ from 817 Google reviews.
- 4.9★ from 817 Google reviews
- Hours
- Mon–Fri 7:30 AM–4:30 PM · Sat–Sun closed
- Address
- 1758 Chase Dr, Fenton, MO 63026
Based in Fairview Heights, 3 mi away
51/100CR ScoreRanked #22 because of its Google rating and availability: 3.5★ from 24 Google reviews, open 24/7.
- 3.5★ from 24 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 300 Monticello Pl, Fairview Heights, IL 62208
#23 proSOLAR
Based in Ballwin, 29 mi away
51/100CR ScoreRanked #23 because of its Google rating and trade focus: 4.6★ from 12 Google reviews, listed on Google as “Solar energy company”.
- 4.6★ from 12 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat 9 AM–2 PM · Sun closed
- Address
- 1710 Fenpark Dr Suite 475, Fenton, MO 63026
Based in Highland, 26 mi away
51/100CR ScoreRanked #24 because of its Google rating and trade focus: 5.0★ from 6 Google reviews, listed on Google as “Solar energy company”.
- 5.0★ from 6 Google reviews
- Hours
- Mon–Thu 8 AM–5 PM · Fri 8 AM–4 PM · Sat 8 AM–12 PM · Sun closed
#25 BKJ Solar
Based in Florissant, 28 mi away
51/100CR ScoreRanked #25 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “Solar energy company”.
- 5.0★ from 5 Google reviews
- Hours
- Mon–Sat 9 AM–7 PM · Sun closed
- Address
- 907 Harbor Oaks Ct, Florissant, MO 63031
How much do solar installers cost in O'Fallon?
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 |
How we ranked O'Fallon solar installers
We scored 55 O'Fallon 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 O'Fallon 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 |
Solar installers in O'Fallon: frequently asked questions
Who is the best solar installer in O'Fallon?
By CR Score, the highest-ranked solar installer in O'Fallon, IL is Bates Electric with a CR Score of 57/100. It has 4.8★ from 1,366 Google reviews. It is open 24/7. Freedom Forever (#2) and Streib Company (#3) follow. We ranked 55 solar installers on ten factors, last updated October 22, 2026.
Which solar installers in O'Fallon are open 24/7?
7 ranked solar installers in O'Fallon post 24/7 hours. The highest-ranked are Bates Electric (#1), Streib Company (#3) and Ltd Solar Consulting and Roofing (#5). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which solar installers in O'Fallon work on weekends?
24 of 55 ranked solar installers post Saturday hours and 9 post Sunday hours. The highest-ranked open Saturdays are Bates Electric (#1), Streib Company (#3) and Ltd Solar Consulting and Roofing (#5). Posted hours are office hours; crews may book weekend jobs separately.
How much does solar panel installation cost in O'Fallon?
Solar panel installation typically costs $26,020 to $32,010, with $29,430 typical (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)). The range is adjusted for Illinois. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do O'Fallon solar installers have?
The median Google rating among 55 rated solar installers in O'Fallon is 4.9★, with a median of 17 reviews. Bates Electric has the most, 1,366 reviews, and ranks #1. We adjust ratings for review count, so a few five-star reviews cannot top the list.
How does ContractorsRanked rank solar installers?
Each solar installer gets a 0–100 CR Score from ten published factors, led by reputation (25%), credentials (15%), review volume (10%) and trade focus (10%). A business with no Google reviews scores zero on rating, review volume and recency; other factors we cannot measure are left out. Only businesses with a confirmed trade and 3 or more reviews, or a claimed profile, are ranked.
Do solar installers outside O'Fallon count in this ranking?
Yes, if they are within 40 mi of the O'Fallon city center, our service radius for solar installers. Each listing shows where the business is based and how far away it is. Proximity is 5% of the CR Score, so a nearby business gets a small edge.
Can solar installers pay to rank higher on ContractorsRanked?
No. The CR Score never reads payment status, and this ranking has 0 paid placements. Up to 3 Featured businesses may appear above the list, labelled Featured and showing their honest rank.
Update log for O'Fallon
- October 2026: CR Scores recalculated for 55 solar installers serving O'Fallon.
More solar installers and O'Fallon pages
Solar installers near O'Fallon
- Solar installers in Shiloh, IL54 ranked
- Solar installers in Fairview Heights, IL56 ranked
- Solar installers in Swansea, IL56 ranked
- Solar installers in Belleville, IL56 ranked
- Solar installers in Collinsville, IL56 ranked
- Solar installers in Maryville, IL56 ranked
- Solar installers in Mascoutah, IL45 ranked
- Solar installers in Troy, IL55 ranked
- Solar installers in Glen Carbon, IL56 ranked
- Solar installers in Centreville, IL59 ranked
Other trades in O'Fallon
- Roofers in O'Fallon570 ranked
- Plumbers in O'Fallon184 ranked
- Electricians in O'Fallon110 ranked
- HVAC contractors in O'Fallon246 ranked
- General contractors in O'Fallon258 ranked
- Painters in O'Fallon46 ranked
- Landscapers in O'Fallon68 ranked
- Handymen in O'Fallon28 ranked
- Kitchen remodelers in O'Fallon119 ranked
- Bathroom remodelers in O'Fallon117 ranked
- Flooring contractors in O'Fallon89 ranked
- Tile installers in O'Fallon10 ranked
- Drywall contractors in O'Fallon11 ranked
- Concrete contractors in O'Fallon100 ranked
- Fence contractors in O'Fallon53 ranked
- Deck builders in O'Fallon62 ranked
- Siding contractors in O'Fallon226 ranked
- Window installers in O'Fallon158 ranked
- Gutter installers in O'Fallon93 ranked
- Insulation contractors in O'Fallon20 ranked
- Garage door repair companies in O'Fallon42 ranked
- Foundation repair companies in O'Fallon65 ranked
- Tree services in O'Fallon127 ranked
- Masonry contractors in O'Fallon78 ranked
- Water damage restoration companies in O'Fallon209 ranked
- Home builders in O'Fallon168 ranked
- Demolition contractors in O'Fallon26 ranked
- All contractors in O'Fallon