90/100CR Score
Ranked #1 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
Best Solar Installers in Walnut, CA (2026)
610 solar installers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Walnut: Solar Express Cleaning, CR Score 90/100; 5.0★ from 308 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Mr. Solar Clean, posts 24/7 hours; ranked #2 of 610.
- 6
Most-reviewed: EnergyAid, 1,353 Google reviews at 4.7★, the most of 610 ranked; ranked #6.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
610 Walnut solar installers are ranked here by CR Score, from 8 published factors. 75 are open 24/7, 346 open Saturdays and 213 open Sundays, based on posted hours. The median Google rating is 5.0★ across 610 rated businesses.
Top 10 solar installers in Walnut at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Solar Express Cleaning | 90 | 5.0★ (308) | Chino Hills, 20 mi away | 24/7 | Overall |
| 2 | Mr. Solar Clean | 90 | 5.0★ (369) | Carson, 25 mi away | 24/7 | Emergencies |
| 3 | Affordable Solar Cleaning Pros | 89 | 5.0★ (628) | Loma Linda, 36 mi away | 24/7 | — |
| 4 | SoCal Solar Panel Cleaning Company | 88 | 5.0★ (246) | La Verne, 9 mi away | Sat · Sun · Evenings | — |
| 5 | EnergyAid | 88 | 4.8★ (534) | San Bernardino, 33 mi away | 24/7 | — |
| 6 | EnergyAid | 87 | 4.7★ (1,353) | Santa Ana, 20 mi away | 24/7 | Most reviews |
| 7 | Semper Solaris | 87 | 4.7★ (515) | Santa Fe Springs, 13 mi away | Sat · Sun · Evenings | — |
| 8 | BestSolarCleaning, LLC | 87 | 5.0★ (81) | Hacienda Heights, 5 mi away | Sat · Sun · Evenings | — |
| 9 | Sunrun Solar | 86 | 4.8★ (262) | Santa Fe Springs, 12 mi away | Sat · Sun | — |
| 10 | Smart Solar Panel Cleaning Los Angeles | 86 | 5.0★ (90) | Redondo Beach, 30 mi away | 24/7 | — |
The 610 best solar installers in Walnut, 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 Carson, 25 mi away
90/100CR ScoreRanked #2 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
Based in Loma Linda, 36 mi away
89/100CR ScoreRanked #3 because of its Google rating and availability: 5.0★ from 628 Google reviews, open 24/7.
- 5.0★ from 628 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1924 Hardt St, Loma Linda, CA 92354
Based in La Verne, 9 mi away
88/100CR ScoreRanked #4 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
#5 EnergyAid
Based in San Bernardino, 33 mi away
88/100CR ScoreRanked #5 because of its Google rating and availability: 4.8★ from 534 Google reviews, open 24/7.
- 4.8★ from 534 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2211 S Hunts Ln ste p, San Bernardino, CA 92408
#6 EnergyAid
Based in Santa Ana, 20 mi away
87/100CR ScoreRanked #6 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 Santa Fe Springs, 13 mi away
87/100CR ScoreRanked #7 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 Hacienda Heights, 5 mi away
87/100CR ScoreRanked #8 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
#9 Sunrun Solar
Based in Santa Fe Springs, 12 mi away
86/100CR ScoreRanked #9 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 Redondo Beach, 30 mi away
86/100CR ScoreRanked #10 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
Based in Anaheim, 21 mi away
86/100CR ScoreRanked #11 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 Whittier, 11 mi away
86/100CR ScoreRanked #12 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 Irvine, 24 mi away
85/100CR ScoreRanked #13 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
Based in Altadena, 14 mi away
85/100CR ScoreRanked #14 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 Long Beach, 23 mi away
84/100CR ScoreRanked #15 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 Bellflower, 9 mi away
84/100CR ScoreRanked #16 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 Burbank, 39 mi away
84/100CR ScoreRanked #17 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
Based in Los Angeles, 24 mi away
84/100CR ScoreRanked #18 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
Based in Barstow, 39 mi away
84/100CR ScoreRanked #19 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
#20 Solar Sparkle
Based in Anaheim, 26 mi away
84/100CR ScoreRanked #20 because of its Google rating and trade focus: 5.0★ from 110 Google reviews, listed on Google as “Solar energy company”.
- 5.0★ from 110 Google reviews
- Hours
- Mon–Sun 8 AM–10 PM
#21 Semper Solaris
Based in Santa Ana, 20 mi away
83/100CR ScoreRanked #21 because of its Google rating and trade focus: 4.7★ from 156 Google reviews, listed on Google as “Solar energy company”.
- 4.7★ from 156 Google reviews
- Hours
- Mon–Sat 7 AM–12 AM · Sun 9 AM–12 AM
- Address
- 1701 E Edinger Ave Suite H1, Santa Ana, CA 92705
Based in Irvine, 23 mi away
83/100CR ScoreRanked #22 because of its Google rating and trade focus: 4.9★ from 99 Google reviews, listed on Google as “Solar energy company”.
- 4.9★ from 99 Google reviews
- Hours
- Mon–Sun 8:30 AM–8 PM
- Address
- 17952 Sky Park Cir Suite D, Irvine, CA 92614
Based in Eastvale, 21 mi away
83/100CR ScoreRanked #23 because of its Google rating and trade focus: 5.0★ from 310 Google reviews, listed on Google as “Solar panel maintenance service”.
- 5.0★ from 310 Google reviews
- Hours
- Mon–Fri 7 AM–5 PM · Sat 7 AM–12 PM · Sun closed
Based in Culver City, 30 mi away
83/100CR ScoreRanked #24 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 Echo Park, 16 mi away
83/100CR ScoreRanked #25 because of its Google rating and availability: 5.0★ from 12 Google reviews, open 24/7.
- 5.0★ from 12 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
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 610 ranked solar installers here; the rest are on their profiles.
Also serving Walnut
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) | In Walnut |
| B K Window Cleaning | 5.0★ (2) | 11 mi |
| Best Solar Company Rowland Heights | 5.0★ (2) | 4 mi |
| Better Power Project | 5.0★ (2) | 4 mi |
| Bright Spot Solar | 5.0★ (2) | 5 mi |
| Built Services, Inc. | 5.0★ (2) | 11 mi |
| Burning Daylight Solar | 5.0★ (2) | 2 mi |
| Duncan Solar | 5.0★ (2) | 12 mi |
| Empower Service Partners | 5.0★ (2) | 11 mi |
| Eversun Solar Engineering LLC | 5.0★ (2) | 9 mi |
| HPM Solar | 5.0★ (2) | 10 mi |
| Lux Smart Energy | 5.0★ (2) | 4 mi |
| New Era Energy Electric | 5.0★ (2) | 11 mi |
| Resonance Solar Installation | In Walnut | |
| Ryan Hawkins, ASE Solar Solutions, Inc. | In Walnut | |
| Solar My Home Chino | 5.0★ (2) | 10 mi |
| SolarGreen DirectPanel Chino Co | 5.0★ (2) | 11 mi |
| sunshine Pacific group America Inc | 3.0★ (2) | 7 mi |
| Unlimit Energy Inc. | In Walnut | |
| ZenOut Construction Inc. | 2.0★ (2) | 11 mi |
How much do solar installers cost in Walnut?
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 Walnut solar installers
We scored 610 Walnut 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 Walnut 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 Walnut: frequently asked questions
Who is the best solar installer in Walnut?
By CR Score, the highest-ranked solar installer in Walnut, CA is Solar Express Cleaning with a CR Score of 90/100. It has 5.0★ from 308 Google reviews. It is open 24/7. Mr. Solar Clean (#2) and Affordable Solar Cleaning Pros (#3) follow. We ranked 610 solar installers on 8 factors, last updated October 22, 2026.
How many solar installers are there in Walnut?
ContractorsRanked ranks 610 solar installers serving Walnut, CA. 1 of them is based in Walnut; 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 Walnut are open 24/7?
75 ranked solar installers in Walnut post 24/7 hours. The highest-ranked are Solar Express Cleaning (#1), Mr. Solar Clean (#2) and Affordable Solar Cleaning Pros (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which solar installers in Walnut work on weekends?
346 of 610 ranked solar installers post Saturday hours and 213 post Sunday hours. The highest-ranked open Saturdays are Solar Express Cleaning (#1), Mr. Solar Clean (#2) and Affordable Solar Cleaning Pros (#3). Posted hours are office hours; crews may book weekend jobs separately.
How much does solar panel installation cost in Walnut?
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 Walnut solar installers have?
The median Google rating among 610 rated solar installers in Walnut is 5.0★, with a median of 14 reviews. EnergyAid has the most, 1,353 reviews, and ranks #6. 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 Walnut count in this ranking?
Yes, if they are within 40 mi of the Walnut 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 Walnut
- October 2026: CR Scores recalculated for 610 solar installers serving Walnut.
- October 2026: 7 duplicate listings merged.
More solar installers and Walnut pages
Solar installers near Walnut
- Solar installers in South San Jose Hills, CA619 ranked
- Solar installers in Diamond Bar, CA594 ranked
- Solar installers in Rowland Heights, CA618 ranked
- Solar installers in Valinda, CA646 ranked
- Solar installers in La Puente, CA639 ranked
- Solar installers in Covina, CA630 ranked
- Solar installers in West Covina, CA650 ranked
- Solar installers in Charter Oak, CA612 ranked
- Solar installers in Hacienda Heights, CA645 ranked
- Solar installers in West Puente Valley, CA655 ranked
Other trades in Walnut
- Roofers in Walnut1983 ranked
- Plumbers in Walnut1424 ranked
- Electricians in Walnut1027 ranked
- HVAC contractors in Walnut1432 ranked
- General contractors in Walnut1435 ranked
- Painters in Walnut226 ranked
- Landscapers in Walnut259 ranked
- Handymen in Walnut111 ranked
- Kitchen remodelers in Walnut704 ranked
- Bathroom remodelers in Walnut695 ranked
- Flooring contractors in Walnut624 ranked
- Tile installers in Walnut104 ranked
- Drywall contractors in Walnut37 ranked
- Concrete contractors in Walnut404 ranked
- Fence contractors in Walnut308 ranked
- Deck builders in Walnut162 ranked
- Siding contractors in Walnut126 ranked
- Window installers in Walnut685 ranked
- Gutter installers in Walnut198 ranked
- Insulation contractors in Walnut228 ranked
- Garage door repair companies in Walnut291 ranked
- Foundation repair companies in Walnut236 ranked
- Tree services in Walnut336 ranked
- Masonry contractors in Walnut234 ranked
- Water damage restoration companies in Walnut1308 ranked
- Home builders in Walnut824 ranked
- Demolition contractors in Walnut161 ranked
- All contractors in Walnut