86/100CR Score
Ranked #1 because of its Google rating and availability: 5.0★ from 7 Google reviews, open 24/7.
- 5.0★ from 7 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Best Solar Installers in Decatur, IL (2026)
33 solar installers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Decatur: Freeman Energy, CR Score 86/100; 5.0★ from 7 Google reviews; open 24/7.
- 3
Best for emergencies (open 24/7): Sharper iron Developers, posts 24/7 hours; ranked #3 of 33.
- 4
Most-reviewed: MB Heating & Cooling, 990 Google reviews at 4.7★, the most of 33 ranked; ranked #4.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
33 Decatur solar installers are ranked here by CR Score, from 8 published factors. 6 are open 24/7, 19 open Saturdays and 11 open Sundays, based on posted hours. The median Google rating is 4.9★ across 33 rated businesses.
Top 10 solar installers in Decatur at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Freeman Energy | 86 | 5.0★ (7) | Decatur | 24/7 | Overall |
| 2 | Thrive Solar | 84 | 5.0★ (57) | Downers Grove, 18 mi away | Sat · Sun · Evenings | — |
| 3 | Sharper iron Developers | 82 | 5.0★ (114) | Bloomington, 25 mi away | 24/7 | Emergencies |
| 4 | MB Heating & Cooling | 81 | 4.7★ (990) | Springfield, 39 mi away | 24/7 | Most reviews |
| 5 | Legacy Roofing & Solar | 81 | 4.7★ (172) | Mattoon, 40 mi away | 24/7 | — |
| 6 | SunSent Solar | 79 | 5.0★ (10) | Decatur | Sat | — |
| 7 | JESS CO ENTERPRISES LLC | 79 | 5.0★ (33) | East Saint Louis, 18 mi away | Sat | — |
| 8 | Capital City Roofing & Solar | 79 | 5.0★ (26) | Springfield, 33 mi away | 24/7 | — |
| 9 | SolarQueenFina | 79 | 4.5★ (8) | Cicero, 18 mi away | Sat · Sun · Evenings | — |
| 10 | Firefly Energy | 79 | 5.0★ (13) | Springfield, 11 mi away | Sat · Evenings | — |
The 33 best solar installers in Decatur, ranked
Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.
Scores below: based on 6 of 8 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
#2 Thrive Solar
Based in Downers Grove, 18 mi away
84/100CR ScoreRanked #2 because of its Google rating and trade focus: 5.0★ from 57 Google reviews, listed on Google as “Solar energy company”.
- 5.0★ from 57 Google reviews
- Hours
- Mon–Fri 9 AM–8 PM · Sat 10 AM–7 PM · Sun 9 AM–8 PM
Based in Bloomington, 25 mi away
82/100CR ScoreRanked #3 because of its Google rating and availability: 5.0★ from 114 Google reviews, open 24/7.
- 5.0★ from 114 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Springfield, 39 mi away
81/100CR ScoreRanked #4 because of its Google rating and review volume: 4.7★ from 990 Google reviews, the most Google reviews on this list (990).
- 4.7★ from 990 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1555 W Jefferson St, Springfield, IL 62702
Based in Mattoon, 40 mi away
81/100CR ScoreRanked #5 because of its Google rating and availability: 4.7★ from 172 Google reviews, open 24/7.
- 4.7★ from 172 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1001 Dewitt Ave, Mattoon, IL 61938
Based in Decatur
79/100CR ScoreRanked #6 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
- Hours
- Mon–Fri 8 AM–5 PM · Sat 9 AM–5 PM · Sun closed
- Address
- 150 Lewis Park Dr Suite H, Mt Zion, IL 62549
Based in East Saint Louis, 18 mi away
79/100CR ScoreRanked #7 because of its Google rating and trade focus: 5.0★ from 33 Google reviews, listed on Google as “Solar energy company”.
- 5.0★ from 33 Google reviews
- Hours
- Mon–Sat 9 AM–6 PM · Sun closed
Based in Springfield, 33 mi away
79/100CR ScoreRanked #8 because of its Google rating and availability: 5.0★ from 26 Google reviews, open 24/7.
- 5.0★ from 26 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1501 Appalachian Trail, Rochester, IL 62563
Based in Cicero, 18 mi away
79/100CR ScoreRanked #9 because of its Google rating and trade focus: 4.5★ from 8 Google reviews, listed on Google as “Solar energy company”.
- 4.5★ from 8 Google reviews
- Hours
- Mon–Sun 9 AM–9 PM
#10 Firefly Energy
Based in Springfield, 11 mi away
79/100CR ScoreRanked #10 because of its Google rating and trade focus: 5.0★ from 13 Google reviews, listed on Google as “Solar energy company”.
- 5.0★ from 13 Google reviews
- Hours
- Mon–Sat 9 AM–7 PM · Sun closed
Based in Crystal Lake, 18 mi away
78/100CR ScoreRanked #11 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “Solar energy company”.
- 5.0★ from 4 Google reviews
- Hours
- Mon–Fri 7 AM–9 PM · Sat–Sun 7 AM–5 PM
#12 Renew Tech
Based in Dixon, 18 mi away
78/100CR ScoreRanked #12 because of its Google rating and trade focus: 5.0★ from 18 Google reviews, listed on Google as “Solar energy company”.
- 5.0★ from 18 Google reviews
- Hours
- Mon–Fri 8 AM–6 PM · Sat 8 AM–4 PM · Sun closed
#13 LGCY Power
Based in Springfield, 35 mi away
78/100CR ScoreRanked #13 because of its Google rating and trade focus: 4.2★ from 153 Google reviews, listed on Google as “Solar energy company”.
- 4.2★ from 153 Google reviews
- Hours
- Mon–Sun 9 AM–5 PM
- Address
- 1617 Groth St, Springfield, IL 62703
Based in Fort Leonard Wood, 18 mi away
78/100CR ScoreRanked #14 because of its Google rating and trade focus: 4.0★ from 4 Google reviews, listed on Google as “Solar energy company”.
- 4.0★ from 4 Google reviews
- Hours
- Mon 8 AM–9 PM · Tue–Fri 8 AM–8 PM · Sat 8 AM–6 PM · Sun 10 AM–5 PM
#15 Aveyo
Based in Springfield, 37 mi away
77/100CR ScoreRanked #15 because of its Google rating and trade focus: 4.9★ from 296 Google reviews, listed on Google as “Solar energy company”.
- 4.9★ from 296 Google reviews
- Hours
- Mon–Fri 9 AM–5 PM · Sat–Sun closed
- Address
- 916 Community Dr, Springfield, IL 62703
#16 Ambia - Illinois
Based in Eagle Mountain, 18 mi away
75/100CR ScoreRanked #16 because of its Google rating and trade focus: 5.0★ from 28 Google reviews, listed on Google as “Solar energy company”.
- 5.0★ from 28 Google reviews
- Hours
- Mon–Fri 8 AM–6 PM · Sat–Sun closed
#17 Light Owl Energy
Based in Cicero, 18 mi away
75/100CR ScoreRanked #17 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–Fri 10 AM–6 PM · Sat 9 AM–2 PM · Sun closed
#18 Route 66 Solar
Based in Springfield, 37 mi away
75/100CR ScoreRanked #18 because of its Google rating and trade focus: 4.9★ from 108 Google reviews, listed on Google as “Solar energy company”.
- 4.9★ from 108 Google reviews
- Hours
- Mon–Thu 10 AM–8 PM · Fri 10 AM–6 PM · Sat–Sun closed
- Address
- 1 W Old State Capitol Plaza Suite 505, Springfield, IL 62701
Based in Deerfield, 18 mi away
75/100CR ScoreRanked #19 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Solar energy company”.
- 5.0★ from 3 Google reviews
- Hours
- Mon–Fri 8 AM–7 PM · Sat 9 AM–3 PM · Sun closed
Based in East Saint Louis, 37 mi away
74/100CR ScoreRanked #20 because of its Google rating and trade focus: 4.9★ from 55 Google reviews, listed on Google as “Solar energy company”.
- 4.9★ from 55 Google reviews
- Hours
- Mon–Fri 7 AM–7 PM · Sat–Sun closed
#21 AMS INC.
Based in Clinton, 22 mi away
74/100CR ScoreRanked #21 because of its Google rating and availability: 3.5★ from 16 Google reviews, open 24/7.
- 3.5★ from 16 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 217 E Main St, Clinton, IL 61727
#22 Mint Green Solar
Based in Darien, 18 mi away
74/100CR ScoreRanked #22 because of its Google rating and trade focus: 5.0★ from 13 Google reviews, listed on Google as “Solar energy company”.
- 5.0★ from 13 Google reviews
- Hours
- Mon–Fri 7 AM–6 PM · Sat–Sun closed
#23 API Solar
Based in Springfield, 36 mi away
71/100CR ScoreRanked #23 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Solar energy company”.
- 5.0★ from 3 Google reviews
- Hours
- Mon–Fri 9 AM–5 PM · Sat 10 AM–5 PM · Sun closed
- Address
- 3888 N Peoria Rd, Springfield, IL 62702
Based in Evanston, 14 mi away
71/100CR ScoreRanked #24 because of its Google rating and trade focus: 4.0★ from 4 Google reviews, listed on Google as “Solar energy company”.
- 4.0★ from 4 Google reviews
- Hours
- Mon–Fri 9 AM–5 PM · Sat–Sun closed
Based in Rochelle, 18 mi away
70/100CR ScoreRanked #25 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Solar energy system service”.
- 5.0★ from 3 Google reviews
- Hours
- Mon–Fri 8 AM–4 PM · Sat–Sun closed
All 33 solar installers
#1 to #25 are shown in full above. Here are #26 to #33, in CR Score order; each links to its profile.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | WindSolarUSA, Inc. | 69 | 4.7★ (15) | 37 mi |
| 27 | Harmony Builders Group | 69 | 4.6★ (16) | 18 mi |
| 28 | Solarability LLC | 68 | 5.0★ (10) | 18 mi |
| 29 | IQ Group Inc | 67 | 4.0★ (4) | 36 mi |
| 30 | EFS Energy | 67 | 4.0★ (4) | 37 mi |
| 31 | Redemption Roofing and Exteriors | 66 | 4.8★ (34) | 33 mi |
| 32 | Rector Solar & Roofing | 66 | 4.2★ (62) | 38 mi |
| 33 | Egizii Electric, Inc | 62 | 4.7★ (6) | 35 mi |
Also serving Decatur
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 |
|---|---|---|
| ABC Utilities | 18 mi | |
| Ana & Yisel Ciudad Maderas | 18 mi | |
| Assured Insulation | 4.5★ (22) | In Decatur |
| Bodine Electric of Decatur | 3.9★ (19) | In Decatur |
| CMR Energy Consulting | 18 mi | |
| Community Solar Developments | 18 mi | |
| Cooks Mill Solar Project | 5.0★ (1) | 36 mi |
| Electrical Service Company | 5.0★ (2) | In Decatur |
| Girl Boss’n Solar | 18 mi | |
| Green Light Energy | 18 mi | |
| Illinois Community Solar | 18 mi | |
| Illinois Solar Solutions | 18 mi | |
| Penrose Solar, LLC. | 7 mi | |
| Porter Electric | 5.0★ (1) | 30 mi |
| PV Precision System’s LLC. | 5.0★ (2) | 18 mi |
| Reliable Solar Energy & Roofing | 5.0★ (2) | 38 mi |
| SimpleStar Solar | 5.0★ (1) | 18 mi |
| Solar Protection Company | 1.0★ (1) | 18 mi |
| Solar With Summer | In Decatur | |
| Sonne Energy Solutions LLC | 18 mi |
How much do solar installers cost in Decatur?
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 Decatur solar installers
We scored 33 Decatur 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 Decatur 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 |
Solar installers in Decatur: frequently asked questions
Who is the best solar installer in Decatur?
By CR Score, the highest-ranked solar installer in Decatur, IL is Freeman Energy with a CR Score of 86/100. It has 5.0★ from 7 Google reviews. It is open 24/7. Thrive Solar (#2) and Sharper iron Developers (#3) follow. We ranked 33 solar installers on 8 factors, last updated October 22, 2026.
How many solar installers are there in Decatur?
ContractorsRanked ranks 33 solar installers serving Decatur, IL. 2 of them are based in Decatur; the rest serve it from nearby towns. Another 20 within 40 mi are listed but not ranked yet. Counts are as of October 2026.
Which solar installers in Decatur are open 24/7?
6 ranked solar installers in Decatur post 24/7 hours. The highest-ranked are Freeman Energy (#1), Sharper iron Developers (#3) and MB Heating & Cooling (#4). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which solar installers in Decatur work on weekends?
19 of 33 ranked solar installers post Saturday hours and 11 post Sunday hours. The highest-ranked open Saturdays are Freeman Energy (#1), Thrive Solar (#2) and Sharper iron Developers (#3). Posted hours are office hours; crews may book weekend jobs separately.
How much does solar panel installation cost in Decatur?
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 Decatur solar installers have?
The median Google rating among 33 rated solar installers in Decatur is 4.9★, with a median of 15 reviews. MB Heating & Cooling has the most, 990 reviews, and ranks #4. 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 8 published factors, led by reputation (35%), credentials (15%), review volume (10%) and recency (10%). Factors we cannot measure are left out, not scored as zero. Only businesses with a confirmed trade and 3 or more reviews, or a claimed profile, are ranked.
Do solar installers outside Decatur count in this ranking?
Yes, if they are within 40 mi of the Decatur 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.
Update log for Decatur
- October 2026: CR Scores recalculated for 33 solar installers serving Decatur.
More solar installers and Decatur pages
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