55 solar installers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Hidden Valley Lake: Sunlight Solar Clean, CR Score 61/100; 5.0★ from 484 Google reviews; open 7 days a week.
Best for emergencies (open 24/7): Solar Santa Rosa, posts 24/7 hours; ranked #4 of 55.
Most-reviewed: Ongaro & Sons, 1,222 Google reviews at 4.9★, the most of 55 ranked; ranked #5.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
55 Hidden Valley Lake solar installers are ranked here by CR Score, from ten published factors. 8 are open 24/7, 24 open Saturdays and 15 open Sundays, based on posted hours. The median Google rating is 5.0★ across 55 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 | Sonoma Solar Clean | 60 | 5.0★ (157) | Santa Rosa, 20 mi away | Sat · Sun · Evenings | — |
| 3 | Sunrun Solar | 58 | 4.8★ (472) | Petaluma, 38 mi away | Sat · Sun | — |
| 4 | Solar Santa Rosa | 58 | 5.0★ (33) | Santa Rosa, 27 mi away | 24/7 | Emergencies |
| 5 | Ongaro & Sons | 58 | 4.9★ (1,222) | Santa Rosa, 27 mi away | 24/7 | Most reviews |
| 6 | Henry Mechanical | 55 | 5.0★ (866) | Windsor, 23 mi away | 24/7 | — |
| 7 | First Response Solar | 55 | 5.0★ (90) | Santa Rosa, 26 mi away | — | — |
| 8 | Ongaro & Sons | 55 | 4.9★ (538) | Petaluma, 38 mi away | 24/7 | — |
| 9 | Soleil Solar | 54 | 5.0★ (15) | Sebastopol, 32 mi away | Sat · Sun | — |
| 10 | Solano Solar Cleaning LLC | 54 | 5.0★ (40) | Petaluma, 35 mi away | Sat · Evenings | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
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 on 8 of 10 factors; credentials and recency not yet collected.
Based in Santa Rosa, 20 mi away
Ranked #2 because of its Google rating and trade focus: 5.0★ from 157 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Petaluma, 38 mi away
Ranked #3 because of its Google rating and trade focus: 4.8★ from 472 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Santa Rosa, 27 mi away
Ranked #4 because of its Google rating and trade focus: 5.0★ from 33 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Santa Rosa, 27 mi away
Ranked #5 because of its Google rating and review volume: 4.9★ from 1,222 Google reviews, the most in Hidden Valley Lake.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Windsor, 23 mi away
Ranked #6 because of its Google rating and review volume: 5.0★ from 866 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Santa Rosa, 26 mi away
Ranked #7 because of its Google rating and trade focus: 5.0★ from 90 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Petaluma, 38 mi away
Ranked #8 because of its Google rating and review volume: 4.9★ from 538 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sebastopol, 32 mi away
Ranked #9 because of its Google rating and trade focus: 5.0★ from 15 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Petaluma, 35 mi away
Ranked #10 because of its Google rating and trade focus: 5.0★ from 40 Google reviews, listed on Google as “Solar panel maintenance service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sebastopol, 32 mi away
Ranked #11 because of its Google rating and trade focus: 5.0★ from 64 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sebastopol, 32 mi away
Ranked #12 because of its Google rating and trade focus: 4.9★ from 84 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Napa, 39 mi away
Ranked #13 because of its Google rating and trade focus: 5.0★ from 6 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Fairfield, 37 mi away
Ranked #14 because of its Google rating and trade focus: 5.0★ from 30 Google reviews, listed on Google as “Solar panel maintenance service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Santa Rosa, 24 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Santa Rosa, 31 mi away
Ranked #16 because of its Google rating and trade focus: 5.0★ from 35 Google reviews, listed on Google as “Solar energy system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Healdsburg, 24 mi away
Ranked #17 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sebastopol, 33 mi away
Ranked #18 because of its Google rating and review volume: 4.9★ from 84 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Healdsburg, 22 mi away
Ranked #19 because of its Google rating and trade focus: 5.0★ from 13 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sebastopol, 31 mi away
Ranked #20 because of its Google rating and trade focus: 4.8★ from 47 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Larkfield-Wikiup, 36 mi away
Ranked #21 because of its Google rating and review volume: 5.0★ from 75 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Santa Rosa, 31 mi away
Ranked #22 because of its Google rating and trade focus: 4.7★ from 46 Google reviews, listed on Google as “Roofing contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Santa Rosa, 30 mi away
Ranked #23 because of its Google rating and trade focus: 4.8★ from 27 Google reviews, listed on Google as “Solar energy system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sebastopol, 31 mi away
Ranked #24 because of its Google rating and trade focus: 4.8★ from 32 Google reviews, listed on Google as “Solar energy system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sonoma, 35 mi away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 8 Google reviews, listed on Google as “Solar energy company”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
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 55 Hidden Valley Lake 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 Hidden Valley Lake 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 |