589 solar installers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Fullerton: Mr. Solar Clean, CR Score 82/100; 5.0★ from 369 Google reviews; open 24/7.
Best for emergencies (open 24/7): EnergyAid, posts 24/7 hours; ranked #2 of 589.
Most-reviewed: EnergyAid, 1,353 Google reviews at 4.7★, the most of 589 ranked; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
589 Fullerton solar installers are ranked here by CR Score, from ten published factors. 70 are open 24/7, 335 open Saturdays and 203 open Sundays, based on posted hours. The median Google rating is 5.0★ across 589 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Mr. Solar Clean | 82 | 5.0★ (369) | Carson, 18 mi away | 24/7 | Overall |
| 2 | EnergyAid | 63 | 4.7★ (1,353) | Santa Ana, 11 mi away | 24/7 | Emergencies, Most reviews |
| 3 | Semper Solaris | 62 | 4.7★ (515) | Santa Fe Springs, 10 mi away | Sat · Sun · Evenings | — |
| 4 | Solar Express Cleaning | 62 | 5.0★ (308) | Chino Hills, 26 mi away | 24/7 | — |
| 5 | Sunrun Solar | 61 | 4.8★ (262) | Santa Fe Springs, 9 mi away | Sat · Sun | — |
| 6 | SoCal Solar Panel Cleaning Company | 61 | 5.0★ (246) | La Verne, 19 mi away | Sat · Sun · Evenings | — |
| 7 | BestSolarCleaning, LLC | 60 | 5.0★ (81) | Hacienda Heights, 9 mi away | Sat · Sun · Evenings | — |
| 8 | Guru Solar Cleaning LLC | 60 | 5.0★ (132) | Long Beach, 14 mi away | Sat · Sun | — |
| 9 | Semper Solaris | 60 | 4.7★ (156) | Santa Ana, 11 mi away | Sat · Sun · Evenings | — |
| 10 | EnergyAid | 59 | 4.8★ (534) | San Bernardino, 39 mi away | 24/7 | — |
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 Santa Ana, 11 mi away
Ranked #2 because of its Google rating and trade focus: 4.7★ from 1,353 Google reviews, listed on Google as “Solar energy company”.
Based in Santa Fe Springs, 10 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 Chino Hills, 26 mi away
Ranked #4 because of its Google rating and trade focus: 5.0★ from 308 Google reviews, listed on Google as “Solar energy company”.
Based in Santa Fe Springs, 9 mi away
Ranked #5 because of its Google rating and trade focus: 4.8★ from 262 Google reviews, listed on Google as “Solar energy company”.
Based in La Verne, 19 mi away
Ranked #6 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, 9 mi away
Ranked #7 because of its Google rating and trade focus: 5.0★ from 81 Google reviews, listed on Google as “Solar energy system service”.
Based in Long Beach, 14 mi away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 132 Google reviews, listed on Google as “Solar panel maintenance service”.
Based in Santa Ana, 11 mi away
Ranked #9 because of its Google rating and trade focus: 4.7★ from 156 Google reviews, listed on Google as “Solar energy company”.
Based in San Bernardino, 39 mi away
Ranked #10 because of its Google rating and trade focus: 4.8★ from 534 Google reviews, listed on Google as “Solar energy system service”.
Based in Anaheim, 16 mi away
Ranked #11 because of its Google rating and trade focus: 5.0★ from 110 Google reviews, listed on Google as “Solar energy company”.
Based in Irvine, 14 mi away
Ranked #12 because of its Google rating and trade focus: 5.0★ from 43 Google reviews, listed on Google as “Solar energy company”.
Based in Irvine, 13 mi away
Ranked #13 because of its Google rating and trade focus: 4.9★ from 99 Google reviews, listed on Google as “Solar energy company”.
Based in Redondo Beach, 25 mi away
Ranked #14 because of its Google rating and trade focus: 5.0★ from 90 Google reviews, listed on Google as “Solar energy company”.
Based in Eastvale, 21 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 310 Google reviews, listed on Google as “Solar panel maintenance service”.
Based in Westminster, 8 mi away
Ranked #16 because of its Google rating and trade focus: 4.9★ from 59 Google reviews, listed on Google as “Solar energy company”.
Based in Anaheim, 17 mi away
Ranked #17 because of its Google rating and review volume: 4.9★ from 322 Google reviews.
Based in Alhambra, 7 mi away
Ranked #18 because of its Google rating and trade focus: 5.0★ from 40 Google reviews, listed on Google as “Solar panel maintenance service”.
Based in Bellflower, 9 mi away
Ranked #19 because of its Google rating and trade focus: 4.9★ from 56 Google reviews, listed on Google as “Solar panel maintenance service”.
Based in Irvine, 14 mi away
Ranked #20 because of its Google rating and trade focus: 5.0★ from 62 Google reviews, listed on Google as “Solar energy company”.
Based in Irvine, 20 mi away
Ranked #21 because of its Google rating and trade focus: 4.6★ from 231 Google reviews, listed on Google as “Solar energy company”.
Based in Whittier, 11 mi away
Ranked #22 because of its Google rating and trade focus: 4.9★ from 148 Google reviews, listed on Google as “Electrician”.
Based in Fullerton
Ranked #23 because of its Google rating and trade focus: 5.0★ from 19 Google reviews, listed on Google as “Solar panel maintenance service”.
Based in Downey, 13 mi away
Ranked #24 because of its Google rating and trade focus: 5.0★ from 45 Google reviews, listed on Google as “Solar energy company”.
Based in Echo Park, 7 mi away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 12 Google reviews, listed on Google as “Solar panel maintenance service”.
#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 589 ranked solar installers here; the rest are on their profiles.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | Green Integrations and Management Inc. | 58 | 5.0★ (100) | 26 mi |
| 27 | TopGuard Roofing | 58 | 4.6★ (161) | 11 mi |
| 28 | Voltaic Construction, LLC | 57 | 4.9★ (132) | 5 mi |
| 29 | OC Solar | 57 | 4.8★ (326) | 16 mi |
| 30 | Optima Energy Inc. | 57 | 4.6★ (14) | 9 mi |
| 31 | Sunlux | 57 | 4.7★ (559) | 18 mi |
| 32 | NexGen Solar | 57 | 4.9★ (47) | 6 mi |
| 33 | SunGuide Solar Inc | 57 | 5.0★ (33) | 5 mi |
| 34 | TENCO SOLAR | 57 | 4.9★ (84) | 3 mi |
| 35 | ACOPOWER | 57 | 4.9★ (196) | 13 mi |
| 36 | Blue Coast Solar Panel Cleaning | 57 | 5.0★ (73) | 27 mi |
| 37 | Solar Tuneup | 57 | 5.0★ (98) | 8 mi |
| 38 | Powerfull Solar, Inc | 57 | 5.0★ (66) | 27 mi |
| 39 | Sun Studios | 57 | 5.0★ (77) | 29 mi |
| 40 | Sunlife Solar and Roofing | 57 | 4.9★ (34) | 15 mi |
| 41 | ProSolar California | 56 | 5.0★ (31) | 27 mi |
| 42 | Donavas | 56 | 5.0★ (7) | 9 mi |
| 43 | Better Earth Solar | 56 | 4.1★ (1,116) | 6 mi |
| 44 | SYNRG Solar - Home Energy Solutions | 56 | 5.0★ (37) | 20 mi |
| 45 | Solar Optimum Glendale | 56 | 4.7★ (348) | 30 mi |
| 46 | Nexus Energy Systems | 56 | 4.6★ (156) | 5 mi |
| 47 | Infinity Solar | 56 | 4.7★ (131) | 6 mi |
| 48 | EL-FI Homes | 56 | 4.8★ (25) | 13 mi |
| 49 | Energy Time Solar | 56 | 4.9★ (45) | 22 mi |
| 50 | Sunrun Solar | 56 | 4.2★ (334) | 23 mi |
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 |
|---|---|---|
| All Covered Solar Solutions | 5.0★ (2) | 5 mi |
| Best Solar Company Rowland Heights | 5.0★ (2) | 7 mi |
| Burning Daylight Solar | 5.0★ (2) | 10 mi |
| Chronicle Electric Inc. | 3.0★ (2) | 8 mi |
| Daily Energy Solar | In Fullerton | |
| Duncan Solar | 5.0★ (2) | 10 mi |
| Fullerton Solar Panel Cleaning | In Fullerton | |
| Luxe Solar Cleaning | 5.0★ (2) | 7 mi |
| OMG Party of 3 | In Fullerton | |
| Power Planet | In Fullerton | |
| Proactive Energy Solutions | In Fullerton | |
| Shorebreak Energy | 5.0★ (2) | 9 mi |
| Solariant, Inc. | 5.0★ (2) | 6 mi |
| SolarPanel RoofNSave Buena | 5.0★ (2) | 5 mi |
| SunShift | In Fullerton | |
| sunshine Pacific group America Inc | 3.0★ (2) | 4 mi |
| Tiny Home Kit DIY | 5.0★ (1) | In Fullerton |
| VietSolar.com | 3.0★ (2) | 8 mi |
| WeGen Solar | 1.0★ (1) | In Fullerton |
| Zenith Solar Installation Garden Grove | 1.0★ (2) | 8 mi |
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 589 Fullerton 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 23, 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 Fullerton 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 |