587 solar installers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Westmont: Mr. Solar Clean, CR Score 65/100; 5.0★ from 369 Google reviews; open 24/7.
Best for emergencies (open 24/7): Smart Solar Panel Cleaning Los Angeles, posts 24/7 hours; ranked #2 of 587.
Most-reviewed: EnergyAid, 1,353 Google reviews at 4.7★, the most of 587 ranked; ranked #6.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
587 Westmont solar installers are ranked here by CR Score, from ten published factors. 77 are open 24/7, 340 open Saturdays and 223 open Sundays, based on posted hours. The median Google rating is 5.0★ across 587 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Mr. Solar Clean | 65 | 5.0★ (369) | Carson, 8 mi away | 24/7 | Overall |
| 2 | Smart Solar Panel Cleaning Los Angeles | 63 | 5.0★ (90) | Redondo Beach, 6 mi away | 24/7 | Emergencies |
| 3 | Semper Solaris | 62 | 4.7★ (515) | Santa Fe Springs, 13 mi away | Sat · Sun · Evenings | — |
| 4 | Sunrun Solar | 61 | 4.8★ (262) | Santa Fe Springs, 14 mi away | Sat · Sun | — |
| 5 | ProSolar California | 61 | 5.0★ (31) | Culver City, 6 mi away | 24/7 | — |
| 6 | EnergyAid | 61 | 4.7★ (1,353) | Santa Ana, 30 mi away | 24/7 | Most reviews |
| 7 | Guru Solar Cleaning LLC | 61 | 5.0★ (132) | Long Beach, 14 mi away | Sat · Sun | — |
| 8 | Green Integrations and Management Inc. | 60 | 5.0★ (100) | Los Angeles, 12 mi away | Sat · Sun · Evenings | — |
| 9 | Sun Studios | 60 | 5.0★ (77) | Beverly Hills, 9 mi away | Sat · Sun · Evenings | — |
| 10 | Powerfull Solar, Inc | 60 | 5.0★ (66) | Los Angeles, 8 mi away | Sat · Sun · Evenings | — |
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.
Ranked #1 because of its Google rating and trade focus: 5.0★ from 369 Google reviews, listed on Google as “Solar energy company”.
Based in Redondo Beach, 6 mi away
Ranked #2 because of its Google rating and trade focus: 5.0★ from 90 Google reviews, listed on Google as “Solar energy company”.
Based in Santa Fe Springs, 13 mi away
Ranked #3 because of its Google rating and trade focus: 4.7★ from 515 Google reviews, listed on Google as “Solar energy company”.
Based in Santa Fe Springs, 14 mi away
Ranked #4 because of its Google rating and trade focus: 4.8★ from 262 Google reviews, listed on Google as “Solar energy company”.
Based in Culver City, 6 mi away
Ranked #5 because of its Google rating and trade focus: 5.0★ from 31 Google reviews, listed on Google as “Solar energy company”.
Based in Santa Ana, 30 mi away
Ranked #6 because of its Google rating and review volume: 4.7★ from 1,353 Google reviews, the most in Westmont.
Based in Long Beach, 14 mi away
Ranked #7 because of its Google rating and trade focus: 5.0★ from 132 Google reviews, listed on Google as “Solar panel maintenance service”.
Based in Los Angeles, 12 mi away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 100 Google reviews, listed on Google as “Solar energy company”.
Based in Beverly Hills, 9 mi away
Ranked #9 because of its Google rating and trade focus: 5.0★ from 77 Google reviews, listed on Google as “Solar energy company”.
Based in Los Angeles, 8 mi away
Ranked #10 because of its Google rating and trade focus: 5.0★ from 66 Google reviews, listed on Google as “Solar energy company”.
Based in Los Angeles, 8 mi away
Ranked #11 because of its Google rating and trade focus: 5.0★ from 27 Google reviews, listed on Google as “Solar energy company”.
Based in Los Angeles, 12 mi away
Ranked #12 because of its Google rating and trade focus: 4.7★ from 158 Google reviews, listed on Google as “Solar energy company”.
Based in Burbank, 27 mi away
Ranked #13 because of its Google rating and trade focus: 5.0★ from 79 Google reviews, listed on Google as “Solar energy system service”.
Based in Los Angeles, 8 mi away
Ranked #14 because of its Google rating and trade focus: 4.9★ from 45 Google reviews, listed on Google as “Solar energy company”.
Based in Downey, 10 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 45 Google reviews, listed on Google as “Solar energy company”.
Based in La Verne, 33 mi away
Ranked #16 because of its Google rating and trade focus: 5.0★ from 246 Google reviews, listed on Google as “Solar energy company”.
Based in Hacienda Heights, 21 mi away
Ranked #17 because of its Google rating and trade focus: 5.0★ from 81 Google reviews, listed on Google as “Solar energy system service”.
Based in Santa Monica, 12 mi away
Ranked #18 because of its Google rating and trade focus: 5.0★ from 15 Google reviews, listed on Google as “Solar energy company”.
Based in Whittier, 15 mi away
Ranked #19 because of its Google rating and trade focus: 4.9★ from 148 Google reviews, listed on Google as “Electrician”.
Based in El Segundo, 6 mi away
Ranked #20 because of its Google rating and trade focus: 5.0★ from 7 Google reviews, listed on Google as “Solar energy system service”.
Based in Beverly Hills, 8 mi away
Ranked #21 because of its Google rating and trade focus: 5.0★ from 8 Google reviews, listed on Google as “Solar energy company”.
Based in Beverly Hills, 8 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 7 Google reviews, listed on Google as “Solar energy company”.
Based in Los Angeles, 15 mi away
Ranked #23 because of its Google rating and review volume: 4.9★ from 434 Google reviews.
Based in Irvine, 32 mi away
Ranked #24 because of its Google rating and trade focus: 5.0★ from 43 Google reviews, listed on Google as “Solar energy company”.
Based in Pasadena, 6 mi away
Ranked #25 because of its Google rating and review volume: 5.0★ from 133 Google reviews.
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 |
We scored 587 Westmont 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 Westmont 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 |