218 solar installers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Napa: Sunlight Solar Clean, CR Score 61/100; 5.0★ from 484 Google reviews; open 7 days a week.
Best for emergencies (open 24/7): East Bay Solar Cleaning LLC, posts 24/7 hours; ranked #5 of 218.
Most-reviewed: SunPower®, 1,576 Google reviews at 4.5★, the most of 218 ranked; ranked #3.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
218 Napa solar installers are ranked here by CR Score, from ten published factors. 25 are open 24/7, 112 open Saturdays and 64 open Sundays, based on posted hours. The median Google rating is 5.0★ across 218 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Sunlight Solar Clean | 61 | 5.0★ (484) | Santa Rosa, 27 mi away | Sat · Sun · Evenings | Overall |
| 2 | Sunrun Solar | 61 | 4.8★ (472) | Petaluma, 20 mi away | Sat · Sun | — |
| 3 | SunPower® | 60 | 4.5★ (1,576) | Richmond, 27 mi away | Sat · Sun · Evenings | Most reviews |
| 4 | Right Now Air & Solar | 60 | 4.9★ (1,388) | Vacaville, 19 mi away | Sat · Sun · Evenings | — |
| 5 | East Bay Solar Cleaning LLC | 59 | 5.0★ (104) | Lafayette, 30 mi away | 24/7 | Emergencies |
| 6 | Solar Shine | 59 | 4.9★ (268) | Antioch, 29 mi away | Sat · Sun | — |
| 7 | Sonoma Solar Clean | 59 | 5.0★ (157) | Santa Rosa, 28 mi away | Sat · Sun · Evenings | — |
| 8 | Horne Enterprises | 58 | 5.0★ (6) | Napa | 24/7 | — |
| 9 | Caro Electric, LLC | 58 | 5.0★ (14) | Benicia, 12 mi away | 24/7 | — |
| 10 | Solano Solar Cleaning LLC | 58 | 5.0★ (30) | Fairfield, 2 mi away | Sat · 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 484 Google reviews, listed on Google as “Solar panel maintenance service”.
Based in Petaluma, 20 mi away
Ranked #2 because of its Google rating and trade focus: 4.8★ from 472 Google reviews, listed on Google as “Solar energy company”.
Based in Richmond, 27 mi away
Ranked #3 because of its Google rating and review volume: 4.5★ from 1,576 Google reviews, the most in Napa.
Based in Vacaville, 19 mi away
Ranked #4 because of its Google rating and review volume: 4.9★ from 1,388 Google reviews.
Based in Lafayette, 30 mi away
Ranked #5 because of its Google rating and trade focus: 5.0★ from 104 Google reviews, listed on Google as “Solar panel maintenance service”.
Based in Antioch, 29 mi away
Ranked #6 because of its Google rating and trade focus: 4.9★ from 268 Google reviews, listed on Google as “Solar energy company”.
Based in Santa Rosa, 28 mi away
Ranked #7 because of its Google rating and trade focus: 5.0★ from 157 Google reviews, listed on Google as “Solar energy company”.
Based in Napa
Ranked #8 because of its Google rating and trade focus: 5.0★ from 6 Google reviews, listed on Google as “Solar energy company”.
Based in Benicia, 12 mi away
Ranked #9 because of its Google rating and trade focus: 5.0★ from 14 Google reviews, listed on Google as “Solar energy company”.
Based in Fairfield, 2 mi away
Ranked #10 because of its Google rating and trade focus: 5.0★ from 30 Google reviews, listed on Google as “Solar panel maintenance service”.
Based in Santa Rosa, 25 mi away
Ranked #11 because of its Google rating and review volume: 4.9★ from 1,222 Google reviews.
Based in Santa Rosa, 28 mi away
Ranked #12 because of its Google rating and trade focus: 5.0★ from 33 Google reviews, listed on Google as “Solar energy company”.
Based in Concord, 24 mi away
Ranked #13 because of its Google rating and trade focus: 4.6★ from 135 Google reviews, listed on Google as “Solar energy company”.
Based in Petaluma, 20 mi away
Ranked #14 because of its Google rating and review volume: 4.9★ from 538 Google reviews.
Based in Vacaville, 19 mi away
Ranked #15 because of its Google rating and trade focus: 4.9★ from 258 Google reviews, listed on Google as “Solar energy company”.
Based in American Canyon, 9 mi away
Ranked #16 because of its Google rating and trade focus: 5.0★ from 6 Google reviews, listed on Google as “Solar energy company”.
Based in Alameda, 7 mi away
Ranked #17 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “Solar panel maintenance service”.
Based in Fairfield, 13 mi away
Ranked #18 because of its Google rating and trade focus: 4.9★ from 48 Google reviews, listed on Google as “Solar energy company”.
Based in San Anselmo, 27 mi away
Ranked #19 because of its Google rating and review volume: 4.9★ from 762 Google reviews.
Based in Dixon, 29 mi away
Ranked #20 because of its Google rating and review volume: 5.0★ from 1,451 Google reviews.
Based in Fairfield, 13 mi away
Ranked #21 because of its Google rating and trade focus: 5.0★ from 15 Google reviews, listed on Google as “Solar energy company”.
Based in Walnut Creek, 30 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 51 Google reviews, listed on Google as “Solar energy company”.
Based in Fairfield, 12 mi away
Ranked #23 because of its Google rating and trade focus: 5.0★ from 20 Google reviews, listed on Google as “Solar energy company”.
Based in Vacaville, 19 mi away
Ranked #24 because of its Google rating and review volume: 4.9★ from 463 Google reviews.
Based in Dublin, 30 mi away
Ranked #25 because of its Google rating and trade focus: 4.9★ from 205 Google reviews, listed on Google as “Solar energy company”.
#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 218 ranked solar installers here; the rest are on their profiles.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | First Response Solar | 55 | 5.0★ (90) | 25 mi |
| 27 | Bundle, A Solar Company | 55 | 5.0★ (38) | 36 mi |
| 28 | Solano Solar Cleaning LLC | 55 | 5.0★ (40) | 26 mi |
| 29 | Shine On Solar & Maintenance | 54 | 5.0★ (45) | 38 mi |
| 30 | Save a Lot Solar | 54 | 4.9★ (45) | 29 mi |
| 31 | Energy Volition | 54 | 5.0★ (8) | 10 mi |
| 32 | Gomax Solar System inc. | 54 | 5.0★ (17) | 17 mi |
| 33 | NDSolution Window Cleaning - Napa Valley | 54 | 5.0★ (68) | 7 mi |
| 34 | Shining Solar Solutions | 54 | 5.0★ (5) | 16 mi |
| 35 | Teodor Window Solar Cleaning | 54 | 4.9★ (80) | 14 mi |
| 36 | Simply Solar | 53 | 4.4★ (101) | 18 mi |
| 37 | Smart Home Security Control | 53 | 5.0★ (31) | 30 mi |
| 38 | North Bay Solar Shine | 53 | 5.0★ (20) | 25 mi |
| 39 | Henry Mechanical | 53 | 5.0★ (866) | 33 mi |
| 40 | Yes Solar Brokers | 53 | 5.0★ (8) | 15 mi |
| 41 | Soleil Solar | 53 | 5.0★ (15) | 32 mi |
| 42 | Solar Cleaning and Repair | 53 | 5.0★ (15) | 32 mi |
| 43 | VITAL ENERGY SOLUTIONS | 53 | 4.9★ (84) | 29 mi |
| 44 | North Valley Solar Power | 53 | 4.8★ (25) | 26 mi |
| 45 | Taylor Energy | 53 | 5.0★ (64) | 30 mi |
| 46 | Squeaky Clean Solar | 53 | 5.0★ (5) | 10 mi |
| 47 | Sunrun Solar | 53 | 3.8★ (469) | 35 mi |
| 48 | KOTA Energy Group | 53 | 4.1★ (94) | 24 mi |
| 49 | Ally Electric And Solar Inc | 53 | 4.7★ (26) | 26 mi |
| 50 | High Definition Solar | 53 | 4.1★ (142) | 25 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 |
|---|---|---|
| 127 Energy | In Napa | |
| Connor Construction Napa | In Napa | |
| Contra Costa Sun | 5.0★ (2) | 32 mi |
| DAP Power Systems | In Napa | |
| Dkb Electric | 5.0★ (1) | In Napa |
| GT Solar Power Concord | 5.0★ (2) | 26 mi |
| Home Solar Inc. | 5.0★ (2) | 33 mi |
| Modern Method Roofing | 3.9★ (20) | In Napa |
| Myles Davis Electric, Inc. | 4.2★ (10) | In Napa |
| Napa Solar Company | In Napa | |
| NationWize Solar | 1.5★ (2) | 19 mi |
| NC Electric & Solar Inc | 3.0★ (2) | 26 mi |
| New Dimension Roofing and Solar | 5.0★ (2) | 15 mi |
| Phils Electric Company | 5.0★ (2) | 32 mi |
| Power Home Performance | In Napa | |
| Robert's Solar | 3.0★ (2) | 26 mi |
| Solar Dealers | 5.0★ (2) | In Napa |
| Solar Energy JKL | 5.0★ (2) | 32 mi |
| Thern Electric | 5.0★ (1) | In Napa |
| You Benefit Solar | 3.0★ (2) | 18 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 218 Napa 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 Napa 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 |