90/100CR Score
Ranked #1 because of its Google rating and availability: 5.0★ from 369 Google reviews, open 24/7.
- 5.0★ from 369 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1714 E Balard St, Carson, CA 90745
Best Solar Installers in Monrovia, CA (2026)
652 solar installers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Monrovia: Mr. Solar Clean, CR Score 90/100; 5.0★ from 369 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Solar Express Cleaning, posts 24/7 hours; ranked #2 of 652.
- 31
Most-reviewed: Payless Water Heaters & Plumbing, Inc., 1,762 Google reviews at 4.8★, the most of 652 ranked; ranked #31.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
652 Monrovia solar installers are ranked here by CR Score, from 8 published factors. 80 are open 24/7, 367 open Saturdays and 234 open Sundays, based on posted hours. The median Google rating is 4.9★ across 652 rated businesses.
Top 10 solar installers in Monrovia at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Mr. Solar Clean | 90 | 5.0★ (369) | Carson, 26 mi away | 24/7 | Overall |
| 2 | Solar Express Cleaning | 89 | 5.0★ (308) | Chino Hills, 29 mi away | 24/7 | Emergencies |
| 3 | SoCal Solar Panel Cleaning Company | 88 | 5.0★ (246) | La Verne, 14 mi away | Sat · Sun · Evenings | — |
| 4 | PENNIES A/C - SOLAR & CONSTRUCTION | 87 | 5.0★ (1,560) | Lancaster, 37 mi away | 24/7 | — |
| 5 | Semper Solaris | 86 | 4.7★ (515) | Santa Fe Springs, 15 mi away | Sat · Sun · Evenings | — |
| 6 | Smart Solar Panel Cleaning Los Angeles | 86 | 5.0★ (90) | Redondo Beach, 28 mi away | 24/7 | — |
| 7 | Sunrun Solar | 86 | 4.8★ (262) | Santa Fe Springs, 15 mi away | Sat · Sun | — |
| 8 | Solar panel maintenance, Solar diagnostic, solar repair and cleaning, bird proofing | 86 | 5.0★ (79) | Burbank, 28 mi away | 24/7 | — |
| 9 | EnergyAid | 86 | 4.7★ (1,353) | Santa Ana, 30 mi away | 24/7 | — |
| 10 | PJ Solar Cleaning & Bird Proofing | 86 | 5.0★ (292) | Barstow, 29 mi away | Sat · Sun · Evenings | — |
The 652 best solar installers in Monrovia, 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.
Based in Chino Hills, 29 mi away
89/100CR ScoreRanked #2 because of its Google rating and availability: 5.0★ from 308 Google reviews, open 24/7.
- 5.0★ from 308 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in La Verne, 14 mi away
88/100CR ScoreRanked #3 because of its Google rating and trade focus: 5.0★ from 246 Google reviews, listed on Google as “Solar energy company”.
- 5.0★ from 246 Google reviews
- Hours
- Mon–Fri 7 AM–9 PM · Sat 7 AM–8 PM · Sun 7 AM–5 PM
- Address
- 2552 Foothill Blvd APT 322, La Verne, CA 91750
Based in Lancaster, 37 mi away
87/100CR ScoreRanked #4 because of its Google rating and availability: 5.0★ from 1,560 Google reviews, open 24/7.
- 5.0★ from 1,560 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2851 W Ave L #215, Lancaster, CA 93536
Based in Santa Fe Springs, 15 mi away
86/100CR ScoreRanked #5 because of its Google rating and trade focus: 4.7★ from 515 Google reviews, listed on Google as “Solar energy company”.
- 4.7★ from 515 Google reviews
- Hours
- Mon–Sat 7 AM–12 AM · Sun 9 AM–12 AM
- Address
- 10713 Norwalk Blvd, Santa Fe Springs, CA 90670
Based in Redondo Beach, 28 mi away
86/100CR ScoreRanked #6 because of its Google rating and availability: 5.0★ from 90 Google reviews, open 24/7.
- 5.0★ from 90 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2612 Carnegie Ln #1, Redondo Beach, CA 90278
#7 Sunrun Solar
Based in Santa Fe Springs, 15 mi away
86/100CR ScoreRanked #7 because of its Google rating and trade focus: 4.8★ from 262 Google reviews, listed on Google as “Solar energy company”.
- 4.8★ from 262 Google reviews
- Hours
- Mon–Sun 8 AM–5 PM
- Address
- 12830 Romandel Ave, Santa Fe Springs, CA 90670
Based in Burbank, 28 mi away
86/100CR ScoreRanked #8 because of its Google rating and availability: 5.0★ from 79 Google reviews, open 24/7.
- 5.0★ from 79 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
#9 EnergyAid
Based in Santa Ana, 30 mi away
86/100CR ScoreRanked #9 because of its Google rating and trade focus: 4.7★ from 1,353 Google reviews, listed on Google as “Solar energy company”.
- 4.7★ from 1,353 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1669 E Wilshire Ave STE 606, Santa Ana, CA 92705
Based in Barstow, 29 mi away
86/100CR ScoreRanked #10 because of its Google rating and trade focus: 5.0★ from 292 Google reviews, listed on Google as “Solar energy company”.
- 5.0★ from 292 Google reviews
- Hours
- Mon–Sun 6 AM–10 PM
Based in Whittier, 12 mi away
85/100CR ScoreRanked #11 because of its Google rating and availability: 4.9★ from 148 Google reviews, open 24/7.
- 4.9★ from 148 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 11721 Whittier Blvd, Whittier, CA 90601
Based in Hacienda Heights, 11 mi away
85/100CR ScoreRanked #12 because of its Google rating and trade focus: 5.0★ from 81 Google reviews, listed on Google as “Solar energy system service”.
- 5.0★ from 81 Google reviews
- Hours
- Mon–Sat 7 AM–8 PM · Sun 7 AM–5 PM
- Address
- 17009 Pepper Brook Way, Hacienda Heights, CA 91745
Based in Los Angeles, 15 mi away
85/100CR ScoreRanked #13 because of its Google rating and trade focus: 5.0★ from 100 Google reviews, listed on Google as “Solar energy company”.
- 5.0★ from 100 Google reviews
- Hours
- Mon–Sun 7 AM–10 PM
- Address
- 3108 Glendale Blvd, Los Angeles, CA 90039
#14 Big Wave Window
Based in Pasadena, 7 mi away
85/100CR ScoreRanked #14 because of its Google rating and availability: 4.8★ from 357 Google reviews, open 24/7.
- 4.8★ from 357 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 41 S Chester Ave Suite A2, Pasadena, CA 91106
Based in Altadena, 17 mi away
85/100CR ScoreRanked #15 because of its Google rating and availability: 5.0★ from 21 Google reviews, open 24/7.
- 5.0★ from 21 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Los Angeles, 16 mi away
84/100CR ScoreRanked #16 because of its Google rating and availability: 4.9★ from 434 Google reviews, open 24/7.
- 4.9★ from 434 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 5467 W San Fernando Rd, Los Angeles, CA 90039
Based in Culver City, 24 mi away
84/100CR ScoreRanked #17 because of its Google rating and availability: 5.0★ from 31 Google reviews, open 24/7.
- 5.0★ from 31 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 5701 Buckingham Pkwy Ste F, Culver City, CA 90230
Based in Los Angeles, 24 mi away
84/100CR ScoreRanked #18 because of its Google rating and availability: 5.0★ from 27 Google reviews, open 24/7.
- 5.0★ from 27 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 3616 Cardiff Ave #104, Los Angeles, CA 90034
Based in Bellflower, 12 mi away
84/100CR ScoreRanked #19 because of its Google rating and trade focus: 4.9★ from 56 Google reviews, listed on Google as “Solar panel maintenance service”.
- 4.9★ from 56 Google reviews
- Hours
- Mon–Sat 8 AM–7 PM · Sun 10 AM–5 PM
Based in Long Beach, 27 mi away
84/100CR ScoreRanked #20 because of its Google rating and trade focus: 5.0★ from 132 Google reviews, listed on Google as “Solar panel maintenance service”.
- 5.0★ from 132 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat–Sun 8 AM–2 PM
- Address
- 767 Euclid Ave, Long Beach, CA 90804
Based in Anaheim, 32 mi away
84/100CR ScoreRanked #21 because of its Google rating and availability: 4.9★ from 322 Google reviews, open 24/7.
- 4.9★ from 322 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Irvine, 34 mi away
84/100CR ScoreRanked #22 because of its Google rating and availability: 5.0★ from 43 Google reviews, open 24/7.
- 5.0★ from 43 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2211 Michelson Dr Suite 900, Irvine, CA 92612
#23 Sun Studios
Based in Beverly Hills, 22 mi away
84/100CR ScoreRanked #23 because of its Google rating and trade focus: 5.0★ from 77 Google reviews, listed on Google as “Solar energy company”.
- 5.0★ from 77 Google reviews
- Hours
- Mon–Sun 8 AM–8 PM
- Address
- 8383 Wilshire Blvd, Beverly Hills, CA 90211
#24 Solar with Roció
Based in Downey, 15 mi away
83/100CR ScoreRanked #24 because of its Google rating and trade focus: 5.0★ from 45 Google reviews, listed on Google as “Solar energy company”.
- 5.0★ from 45 Google reviews
- Hours
- Mon–Sun 8 AM–8 PM
- Address
- 8050 Florence Ave, Downey, CA 90241
Based in Los Angeles, 22 mi away
83/100CR ScoreRanked #25 because of its Google rating and trade focus: 5.0★ from 66 Google reviews, listed on Google as “Solar energy company”.
- 5.0★ from 66 Google reviews
- Hours
- Mon–Sun 8 AM–8 PM
- Address
- 5316 Venice Blvd., Los Angeles, CA 90019
Solar installers ranked #26 to #50
#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 652 ranked solar installers here; the rest are on their profiles.
Also serving Monrovia
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 |
|---|---|---|
| ACOSolar Inc | 5.0★ (2) | 13 mi |
| B K Window Cleaning | 5.0★ (2) | 12 mi |
| Best Solar Company Rowland Heights | 5.0★ (2) | 13 mi |
| Better Power Project | 5.0★ (2) | 15 mi |
| Bright Spot Solar | 5.0★ (2) | 7 mi |
| Built Services, Inc. | 5.0★ (2) | 12 mi |
| Burning Daylight Solar | 5.0★ (2) | 12 mi |
| California Solar Energy & Green Group | 5.0★ (2) | 14 mi |
| Cis Roofing Waterproofing Solar | 5.0★ (2) | 11 mi |
| Duncan Solar | 5.0★ (2) | 13 mi |
| Empower Service Partners | 5.0★ (2) | 12 mi |
| Eversun Solar Engineering LLC | 5.0★ (2) | 12 mi |
| HPM Solar | 5.0★ (2) | 17 mi |
| Lux Smart Energy | 5.0★ (2) | 9 mi |
| My Solar Advisors | In Monrovia | |
| New Era Energy Electric | 5.0★ (2) | 12 mi |
| RenuLogix | 5.0★ (2) | 9 mi |
| Solar Plus | 4.5★ (2) | 15 mi |
| solar tronics | 3.0★ (2) | 10 mi |
| sunshine Pacific group America Inc | 3.0★ (2) | 16 mi |
How much do solar installers cost in Monrovia?
Typical prices in USD, adjusted for California with a published regional index. Each row names its basis and month.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Solar panel installation | $29,770 | $33,680 | $36,640 | Per system: about 12 kW at about $2.60 per watt, before incentives. US national range × 1.08 Pacific factor (2025 Cost vs. Value Report) | October 2026 |
How we ranked Monrovia solar installers
We scored 652 Monrovia 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 Monrovia 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 Monrovia: frequently asked questions
Who is the best solar installer in Monrovia?
By CR Score, the highest-ranked solar installer in Monrovia, CA is Mr. Solar Clean with a CR Score of 90/100. It has 5.0★ from 369 Google reviews. It is open 24/7. Solar Express Cleaning (#2) and SoCal Solar Panel Cleaning Company (#3) follow. We ranked 652 solar installers on 8 factors, last updated October 22, 2026.
How many solar installers are there in Monrovia?
ContractorsRanked ranks 652 solar installers serving Monrovia, CA. Another 20 within 40 mi are listed but not ranked yet. Counts are as of October 2026.
Which solar installers in Monrovia are open 24/7?
80 ranked solar installers in Monrovia post 24/7 hours. The highest-ranked are Mr. Solar Clean (#1), Solar Express Cleaning (#2) and PENNIES A/C - SOLAR & CONSTRUCTION (#4). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which solar installers in Monrovia work on weekends?
367 of 652 ranked solar installers post Saturday hours and 234 post Sunday hours. The highest-ranked open Saturdays are Mr. Solar Clean (#1), Solar Express Cleaning (#2) and SoCal Solar Panel Cleaning Company (#3). Posted hours are office hours; crews may book weekend jobs separately.
How much does solar panel installation cost in Monrovia?
Solar panel installation typically costs $29,770 to $36,640, with $33,680 typical (Per system: about 12 kW at about $2.60 per watt, before incentives. US national range × 1.08 Pacific factor (2025 Cost vs. Value Report)). The range is adjusted for California. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do Monrovia solar installers have?
The median Google rating among 652 rated solar installers in Monrovia is 4.9★, with a median of 16 reviews. Payless Water Heaters & Plumbing, Inc. has the most, 1,762 reviews, and ranks #31. 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 Monrovia count in this ranking?
Yes, if they are within 40 mi of the Monrovia 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 Monrovia
- October 2026: CR Scores recalculated for 652 solar installers serving Monrovia.
- October 2026: 7 duplicate listings merged.
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