283 solar installers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in El Cajon: OnPoint Solar Panel Cleaning San Diego, CR Score 64/100; 5.0★ from 309 Google reviews; open 24/7.
Best for emergencies (open 24/7): Mauzy Cooling, Heating, Plumbing, and Electrical, posts 24/7 hours; ranked #4 of 283.
Most-reviewed: Mauzy Cooling, Heating, Plumbing, and Electrical, 4,710 Google reviews at 4.8★, the most of 283 ranked; ranked #4.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
283 El Cajon solar installers are ranked here by CR Score, from ten published factors. 36 are open 24/7, 166 open Saturdays and 86 open Sundays, based on posted hours. The median Google rating is 5.0★ across 283 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | OnPoint Solar Panel Cleaning San Diego | 64 | 5.0★ (309) | La Mesa, 5 mi away | 24/7 | Overall |
| 2 | Semper Solaris | 62 | 4.8★ (1,454) | San Diego, 13 mi away | Sat · Sun · Evenings | — |
| 3 | West Coast Heating Air Solar | 61 | 4.9★ (1,836) | El Cajon | Sat · Sun · Evenings | — |
| 4 | Mauzy Cooling, Heating, Plumbing, and Electrical | 61 | 4.8★ (4,710) | El Cajon | 24/7 | Emergencies, Most reviews |
| 5 | Saturn Solar Cleaning | 61 | 5.0★ (129) | Chula Vista, 14 mi away | 24/7 | — |
| 6 | Action Solar | 61 | 4.9★ (143) | San Diego, 14 mi away | 24/7 | — |
| 7 | Advanced Solar Cleaning | 60 | 5.0★ (36) | Lakeside, 5 mi away | 24/7 | — |
| 8 | Sunny Sudz Solar Panel Cleaning | 60 | 5.0★ (32) | Casa de Oro-Mount Helix, 3 mi away | 24/7 | — |
| 9 | Semper Solaris | 60 | 4.8★ (1,190) | El Cajon | Sat · Sun · Evenings | — |
| 10 | Baker Home Energy | 60 | 4.8★ (2,727) | Escondido, 24 mi away | Sat | — |
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 309 Google reviews, listed on Google as “Solar energy company”.
Based in San Diego, 13 mi away
Ranked #2 because of its Google rating and trade focus: 4.8★ from 1,454 Google reviews, listed on Google as “Solar energy company”.
Based in El Cajon
Ranked #3 because of its Google rating and review volume: 4.9★ from 1,836 Google reviews.
Based in El Cajon
Ranked #4 because of its Google rating and review volume: 4.8★ from 4,710 Google reviews, the most in El Cajon.
Based in Chula Vista, 14 mi away
Ranked #5 because of its Google rating and trade focus: 5.0★ from 129 Google reviews, listed on Google as “Solar energy system service”.
Based in San Diego, 14 mi away
Ranked #6 because of its Google rating and trade focus: 4.9★ from 143 Google reviews, listed on Google as “Solar energy company”.
Based in Lakeside, 5 mi away
Ranked #7 because of its Google rating and trade focus: 5.0★ from 36 Google reviews, listed on Google as “Solar energy company”.
Based in Casa de Oro-Mount Helix, 3 mi away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 32 Google reviews, listed on Google as “Solar energy system service”.
Based in El Cajon
Ranked #9 because of its Google rating and review volume: 4.8★ from 1,190 Google reviews.
Based in Escondido, 24 mi away
Ranked #10 because of its Google rating and trade focus: 4.8★ from 2,727 Google reviews, listed on Google as “Solar energy company”.
Based in San Diego, 8 mi away
Ranked #11 because of its Google rating and trade focus: 4.8★ from 469 Google reviews, listed on Google as “Solar energy company”.
Based in Chula Vista, 12 mi away
Ranked #12 because of its Google rating and trade focus: 5.0★ from 49 Google reviews, listed on Google as “Solar energy company”.
Based in San Diego, 11 mi away
Ranked #13 because of its Google rating and review volume: 4.9★ from 1,494 Google reviews.
Based in Chula Vista, 14 mi away
Ranked #14 because of its Google rating and trade focus: 5.0★ from 50 Google reviews, listed on Google as “Solar panel maintenance service”.
Based in El Cajon
Ranked #15 because of its Google rating and trade focus: 4.7★ from 888 Google reviews, listed on Google as “Solar energy company”.
Based in San Diego, 13 mi away
Ranked #16 because of its Google rating and trade focus: 5.0★ from 34 Google reviews, listed on Google as “Solar energy company”.
Based in El Cajon
Ranked #17 because of its Google rating and review volume: 4.9★ from 780 Google reviews.
Based in San Diego, 14 mi away
Ranked #18 because of its Google rating and review volume: 4.9★ from 1,612 Google reviews.
Based in Bostonia, 9 mi away
Ranked #19 because of its Google rating and trade focus: 5.0★ from 85 Google reviews, listed on Google as “Solar energy company”.
Based in Lake Elsinore, 13 mi away
Ranked #20 because of its Google rating and trade focus: 5.0★ from 47 Google reviews, listed on Google as “Solar energy system service”.
Based in San Diego, 7 mi away
Ranked #21 because of its Google rating and trade focus: 4.7★ from 39 Google reviews, listed on Google as “Solar energy company”.
Based in San Diego, 16 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 137 Google reviews, listed on Google as “Solar energy company”.
Based in Carlsbad, 29 mi away
Ranked #23 because of its Google rating and trade focus: 4.7★ from 443 Google reviews, listed on Google as “Solar energy company”.
Based in El Cajon
Ranked #24 because of its Google rating and trade focus: 4.9★ from 129 Google reviews, listed on Google as “Roofing contractor”.
Based in El Cajon
Ranked #25 because of its Google rating and trade focus: 5.0★ from 239 Google reviews, listed on Google as “Electrician”.
#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 283 ranked solar installers here; the rest are on their profiles.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | Spark Solar Panel Cleaning | 57 | 5.0★ (45) | 17 mi |
| 27 | Solar Shine San Diego | 57 | 5.0★ (42) | 17 mi |
| 28 | Eminent Energy | 57 | 5.0★ (219) | 26 mi |
| 29 | Your Energy Pros | 57 | 5.0★ (26) | 4 mi |
| 30 | SolarGuru Energy | 56 | 4.3★ (4) | 4 mi |
| 31 | RV and Marine Solar | 56 | 5.0★ (21) | 12 mi |
| 32 | Solar Negotiators | 56 | 4.8★ (259) | 24 mi |
| 33 | BVI Solar | 56 | 4.7★ (26) | 10 mi |
| 34 | Revend Solar & Roofing | 56 | 5.0★ (22) | 12 mi |
| 35 | Raceway Electric & Solar | 56 | 5.0★ (486) | In El Cajon |
| 36 | Wire Smart Solar Installation Company | 56 | 5.0★ (11) | 17 mi |
| 37 | Cyberdyne Solar Company San Diego | 56 | 4.7★ (47) | 17 mi |
| 38 | 1UP Solar | 56 | 4.8★ (26) | 13 mi |
| 39 | Legacy Home Energy | 56 | 5.0★ (86) | In El Cajon |
| 40 | Solar Panel Cleaners LLC | 56 | 4.5★ (8) | 12 mi |
| 41 | Payless Water Heaters | 56 | 4.8★ (507) | 13 mi |
| 42 | The Solar Cleaners | 56 | 5.0★ (68) | 18 mi |
| 43 | Clayco Electric Inc. Solar Specialist | 56 | 4.9★ (47) | 12 mi |
| 44 | Daynight Power Inc | 56 | 5.0★ (23) | 17 mi |
| 45 | Sungenia | 56 | 5.0★ (38) | 11 mi |
| 46 | Restored Solar, Window & Pressure Washing | 56 | 5.0★ (39) | 24 mi |
| 47 | CM Solar Electric | 55 | 4.8★ (26) | 8 mi |
| 48 | Sunspired Solar | 55 | 5.0★ (19) | 17 mi |
| 49 | Johnson Electric Solar | 55 | 5.0★ (22) | 10 mi |
| 50 | Air Flex - HVAC & Solar | 55 | 5.0★ (12) | In El Cajon |
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 |
|---|---|---|
| 48Solar & Roofing | 5.0★ (2) | 9 mi |
| Anson Electric | 4.7★ (75) | In El Cajon |
| California Energy Connection, Inc. | 3.0★ (2) | 8 mi |
| Christian Solar | 5.0★ (2) | In El Cajon |
| F&R Energy Ratings | 5.0★ (3) | In El Cajon |
| Higher Power Solar | 5.0★ (2) | 3 mi |
| McWire Electric, Inc. | 1.0★ (2) | In El Cajon |
| Mesa Emcor | 5.0★ (5) | In El Cajon |
| Pacific View Electric Inc. | 5.0★ (4) | In El Cajon |
| Robertson Solar Panel El Cajon, CA | In El Cajon | |
| Semper Home | 5.0★ (14) | In El Cajon |
| Semper Solaris Air Conditioning & Heating | 1.0★ (1) | In El Cajon |
| ShineBros Window & Solar Cleaning | 5.0★ (2) | 9 mi |
| Smith Electrical Contractors, Inc. | 4.9★ (13) | In El Cajon |
| Solar America | 1.0★ (2) | 9 mi |
| Source One Electrical | 4.1★ (9) | In El Cajon |
| Southwestern Solar Systems | In El Cajon | |
| Suntech Solar Panel Cleaning San Diego | 5.0★ (2) | 9 mi |
| SwimJoy Solar | In El Cajon | |
| T&R Window N Solar Cleaners | 5.0★ (2) | In El Cajon |
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 283 El Cajon 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 El Cajon 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 |