11 solar installers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Eureka: Six Rivers Solar, CR Score 83/100; 4.6★ from 67 Google reviews.
Best for emergencies (open 24/7): Humboldt Exterior Cleaning, posts 24/7 hours; ranked #2 of 11.
Most-reviewed: Greenwired - Solar and HVAC Company, 78 Google reviews at 4.9★, the most of 11 ranked; ranked #5.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
11 Eureka solar installers are ranked here by CR Score, from 8 published factors. 1 is open 24/7, 2 open Saturdays and 1 open Sundays, based on posted hours. The median Google rating is 4.9★ across 11 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Six Rivers Solar | 83 | 4.6★ (67) | Eureka | — | Overall |
| 2 | Humboldt Exterior Cleaning | 81 | 5.0★ (6) | Eureka | 24/7 | Emergencies |
| 3 | Solar Projects Unlimited | 81 | 5.0★ (3) | Arcata, 6 mi away | — | — |
| 4 | Atlas Power Alliance | 80 | 4.9★ (7) | Arcata, 9 mi away | Sat · Evenings | — |
| 5 | Greenwired - Solar and HVAC Company | 79 | 4.9★ (78) | Arcata, 8 mi away | — | Most reviews |
| 6 | Scurfield Electric Heating & Solar | 78 | 4.7★ (60) | Arcata, 6 mi away | — | — |
| 7 | Sunbolt Solar | 75 | 5.0★ (6) | McKinleyville, 13 mi away | — | — |
| 8 | Alchemy Construction | 71 | 4.7★ (12) | Arcata, 6 mi away | — | — |
| 9 | Humboldt Electric | 70 | 4.3★ (6) | Eureka | — | — |
| 10 | Wild Rivers Electric | 68 | 5.0★ (14) | Arcata, 31 mi away | — | — |
Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.
Ranked #1 because of its Google rating and trade focus: 4.6★ from 67 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Eureka
Ranked #2 because of its Google rating and availability: 5.0★ from 6 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Arcata, 6 mi away
Ranked #3 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Solar energy system service”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Arcata, 9 mi away
Ranked #4 because of its Google rating and trade focus: 4.9★ from 7 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Arcata, 8 mi away
Ranked #5 because of its Google rating and review volume: 4.9★ from 78 Google reviews, the most Google reviews on this list (78).
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Arcata, 6 mi away
Ranked #6 because of its Google rating and review volume: 4.7★ from 60 Google reviews, 60 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in McKinleyville, 13 mi away
Ranked #7 because of its Google rating and trade focus: 5.0★ from 6 Google reviews, listed on Google as “Solar energy system service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Arcata, 6 mi away
Ranked #8 because of its Google rating and review volume: 4.7★ from 12 Google reviews, 12 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Eureka
Ranked #9 because of its Google rating and trade focus: 4.3★ from 6 Google reviews, listed on Google as “Electrician”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Arcata, 31 mi away
Ranked #10 because of its Google rating and review volume: 5.0★ from 14 Google reviews, 14 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Arcata, 10 mi away
Ranked #11 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “HVAC contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
7 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 |
|---|---|---|
| Bob White Electric | In Eureka | |
| Elements of Earth and Energy | 10 mi | |
| Messina Electronics Support Services | 5.0★ (1) | 12 mi |
| Nebula Power Solutio | 15 mi | |
| Solar Hot Water Plus | 6 mi | |
| Sunovate Solar | 39 mi | |
| WSC Solar & Roofing | 12 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 11 Eureka solar installers on 8 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. Unknown factors are left out of the score, 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 Eureka data |
|---|---|---|---|
| Reputation | 35% | Bayesian-adjusted Google star rating | Measured |
| Credentials | 15% | Active state license 0.6, bond 0.2, workers’ comp 0.2 | Not yet collected |
| Review volume | 10% | log10(reviews + 1) against the list maximum | Measured |
| Recency | 10% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 10% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | Google main category 1.0, business name 0.7, additional category 0.5 | Measured |
| Proximity | 5% | 1.0 when based in the city, falling to 0 at the trade’s radius | Measured |
| Completeness | 5% | Website, photos, description, hours, claimed profile (0.2 each) | Measured |