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ContractorsRanked

Best Solar Installers in Willowbrook, IL (2026)

138 solar installers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →

The short answer

  1. 1

    Best overall in Willowbrook: E. Scott Ostrowski: Awesome Options for Awesome People, CR Score 89/100; 5.0★ from 48 Google reviews; open 24/7.

  2. 2

    Best for emergencies (open 24/7): Solar & Energy Experts LLC, posts 24/7 hours; ranked #2 of 138.

  3. 9

    Most-reviewed: Sunrun Solar, 822 Google reviews at 4.1★, the most of 138 ranked; ranked #9.

Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank

138 Willowbrook solar installers are ranked here by CR Score, from 8 published factors. 16 are open 24/7, 84 open Saturdays and 32 open Sundays, based on posted hours. The median Google rating is 4.9★ across 138 rated businesses.

Most of this list also appears on the Solar installers in West Town ranking. See Solar installers in West Town

Top 10 solar installers in Willowbrook at a glance

Top 10 solar installers in Willowbrook at a glance
RankBusinessCR ScoreGoogle ratingBased inHoursBest for
1E. Scott Ostrowski: Awesome Options for Awesome People895.0★ (48)Naperville, 5 mi away24/7Overall
2Solar & Energy Experts LLC875.0★ (41)Cicero, 14 mi away24/7Emergencies
3AweSun Power865.0★ (15)Downers Grove, 5 mi away24/7—
4SUNRISE SOLAR854.9★ (173)WillowbrookSat—
5JD Pro Electric Inc845.0★ (134)Franklin Park, 12 mi away24/7—
6Ananta Energy Source845.0★ (10)Darien, 12 mi away24/7—
7Mr. Electric of Greater Naperville834.8★ (185)Crest Hill, 14 mi away24/7—
8Solar by Dave Stanton835.0★ (5)Bolingbrook, 9 mi away24/7—
9Sunrun Solar834.1★ (822)Des Plaines, 17 mi awaySat · SunMost reviews
10Smart Sky Solar824.9★ (46)Schaumburg, 22 mi awaySat · Sun · Evenings—

The 138 best solar installers in Willowbrook, 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.

  4. #4 SUNRISE SOLAR

    Based in Willowbrook

    85/100CR Score

    Ranked #4 because of its Google rating and trade focus: 4.9★ from 173 Google reviews, listed on Google as “Solar energy company”.

    • 4.9★ from 173 Google reviews
    Hours
    Mon–Sat 9 AM–5 PM · Sun closed
    Address
    825 75th St UNIT E, Willowbrook, IL 60527
    View profile for SUNRISE SOLAR(800) 674-3587

  9. #9 Sunrun Solar

    Based in Des Plaines, 17 mi away

    83/100CR Score

    Ranked #9 because of its Google rating and trade focus: 4.1★ from 822 Google reviews, listed on Google as “Solar energy company”.

    • 4.1★ from 822 Google reviews
    Hours
    Mon–Sun 8 AM–5 PM
    Address
    2291 & 2309 S Mt Prospect Rd, Des Plaines, IL 60018
    View profile for Sunrun Solar(833) 324-5886

  10. #10 Smart Sky Solar

    Based in Schaumburg, 22 mi away

    82/100CR Score

    Ranked #10 because of its Google rating and trade focus: 4.9★ from 46 Google reviews, listed on Google as “Solar energy company”.

    • 4.9★ from 46 Google reviews
    Hours
    Mon–Sat 8 AM–8 PM · Sun 8 AM–5 PM
    Address
    1901 N Roselle Rd Suit 800, Schaumburg, IL 60195
    View profile for Smart Sky Solar(224) 219-0544

  13. #13 Kapital Electric, Inc.

    Based in Bensenville, 15 mi away

    81/100CR Score

    Ranked #13 because of its Google rating and trade focus: 4.8★ from 715 Google reviews, listed on Google as “Solar energy system service”.

    • 4.8★ from 715 Google reviews
    Hours
    Mon–Fri 8 AM–4 PM · Sat–Sun closed
    Address
    1270 Mark St, Bensenville, IL 60106
    View profile for Kapital Electric, Inc.(630) 833-2389

  14. #14 Adams

    Based in Morris, 36 mi away

    81/100CR Score

    Ranked #14 because of its Google rating and availability: 4.8★ from 379 Google reviews, open 24/7.

    • 4.8★ from 379 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1299 Leah Rd Suite A, Morris, IL 60450
    View profile for Adams(815) 200-1968

  15. #15 Triumph Solar

    Based in Tinley Park, 16 mi away

    81/100CR Score

    Ranked #15 because of its Google rating and trade focus: 5.0★ from 49 Google reviews, listed on Google as “Solar energy company”.

    • 5.0★ from 49 Google reviews
    Hours
    Mon–Thu 7 AM–7 PM · Fri 9 AM–7 PM · Sat 7 AM–7 PM · Sun closed
    Address
    8527 Scheer Dr, Tinley Park, IL 60487
    View profile for Triumph Solar(708) 498-3249

  16. #16 WindSoleil

    Based in Chicago, 14 mi away

    81/100CR Score

    Ranked #16 because of its Google rating and trade focus: 4.9★ from 72 Google reviews, listed on Google as “Solar energy company”.

    • 4.9★ from 72 Google reviews
    Hours
    Mon–Fri 9 AM–5 PM · Sat 8 AM–4 PM · Sun closed
    Address
    401 N Trumbull Ave # D, Chicago, IL 60624
    View profile for WindSoleil(224) 307-4057

  17. #17 Atlas Solar Advisors

    Based in Chicago, 20 mi away

    81/100CR Score

    Ranked #17 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
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    3152 W Devon Ave APT 2D, Chicago, IL 60659
    View profile for Atlas Solar Advisors(847) 773-7555

  18. #18 GreenGrids

    Based in Shorewood, 25 mi away

    80/100CR Score

    Ranked #18 because of its Google rating and trade focus: 4.7★ from 33 Google reviews, listed on Google as “Solar energy company”.

    • 4.7★ from 33 Google reviews
    Hours
    Mon–Sun 7 AM–7 PM
    Address
    21403 Somerset St, Shorewood, IL 60404
    View profile for GreenGrids(815) 325-3892

  21. #21 1Earth Solar

    Based in Joliet, 20 mi away

    80/100CR Score

    Ranked #21 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–Sun 7 AM–7 PM
    Address
    2108 McDonough St, Joliet, IL 60436
    View profile for 1Earth Solar(844) 803-2784

  25. #25 Illinois Solar Express, LLC

    Based in Elmhurst, 6 mi away

    79/100CR Score

    Ranked #25 because of its Google rating and trade focus: 4.9★ from 31 Google reviews, listed on Google as “Solar energy company”.

    • 4.9★ from 31 Google reviews
    Hours
    Mon 9 AM–6 PM · Tue–Fri 9 AM–8 PM · Sat 9 AM–6 PM · Sun closed
    Address
    1 Mid America Plaza 3rd Floor, Oakbrook Terrace, IL 60181
    View profile for Illinois Solar Express, LLC(773) 876-7676

How much do solar installers cost in Willowbrook?

Typical prices in USD, adjusted for Illinois with a published regional index. Each row names its basis and month.

How much do solar installers cost in Willowbrook?
JobLowTypicalHighBasisChecked
Solar panel installation$26,020$29,430$32,010Per 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 Willowbrook solar installers

We scored 138 Willowbrook 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.

Read the full method: formula, sources and exclusions

CR Score factors and weights
FactorWeightComputed fromIn Willowbrook data
Reputation35%Bayesian-adjusted Google star ratingMeasured
Credentials15%Active state license 0.6, bond 0.2, workers’ comp 0.2Not yet collected
Review volume10%log10(reviews + 1) against the list maximumMeasured
Recency10%Share of reviews from the last 12 monthsNot yet collected
Availability10%Weekly open hours, Saturday, Sunday, 24/7 or same-dayMeasured
Trade focus10%Google main category 1.0, business name 0.7, additional category 0.5Measured
Proximity5%1.0 when based in the city, falling to 0 at the trade’s radiusMeasured
Completeness5%Website, photos, description, hours, claimed profile (0.2 each)Measured

Solar installers in Willowbrook: frequently asked questions

Who is the best solar installer in Willowbrook?

By CR Score, the highest-ranked solar installer in Willowbrook, IL is E. Scott Ostrowski: Awesome Options for Awesome People with a CR Score of 89/100. It has 5.0★ from 48 Google reviews. It is open 24/7. Solar & Energy Experts LLC (#2) and AweSun Power (#3) follow. We ranked 138 solar installers on 8 factors, last updated October 22, 2026.

How many solar installers are there in Willowbrook?

ContractorsRanked ranks 138 solar installers serving Willowbrook, IL. 1 of them is based in Willowbrook; the rest serve it from nearby towns. Counts are as of October 2026.

Which solar installers in Willowbrook are open 24/7?

16 ranked solar installers in Willowbrook post 24/7 hours. The highest-ranked are E. Scott Ostrowski: Awesome Options for Awesome People (#1), Solar & Energy Experts LLC (#2) and AweSun Power (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.

Which solar installers in Willowbrook work on weekends?

84 of 138 ranked solar installers post Saturday hours and 32 post Sunday hours. The highest-ranked open Saturdays are E. Scott Ostrowski: Awesome Options for Awesome People (#1), Solar & Energy Experts LLC (#2) and AweSun Power (#3). Posted hours are office hours; crews may book weekend jobs separately.

How much does solar panel installation cost in Willowbrook?

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 Willowbrook solar installers have?

The median Google rating among 138 rated solar installers in Willowbrook is 4.9★, with a median of 23 reviews. Sunrun Solar has the most, 822 reviews, and ranks #9. 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 Willowbrook count in this ranking?

Yes, if they are within 40 mi of the Willowbrook 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 Willowbrook

  1. October 2026: CR Scores recalculated for 138 solar installers serving Willowbrook.
  2. October 2026: 2 duplicate listings merged.

More solar installers and Willowbrook pages

Other trades in Willowbrook