230 solar installers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Cupertino: Smart Solar Panel Cleaning Bay Area, CR Score 92/100; 5.0★ from 418 Google reviews; open 24/7.
Best for emergencies (open 24/7): EnergyAid, posts 24/7 hours; ranked #2 of 230.
Most-reviewed: EnergyAid, 842 Google reviews at 4.8★, the most of 230 ranked; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
230 Cupertino solar installers are ranked here by CR Score, from 8 published factors. 30 are open 24/7, 118 open Saturdays and 70 open Sundays, based on posted hours. The median Google rating is 4.9★ across 230 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Smart Solar Panel Cleaning Bay Area | 92 | 5.0★ (418) | Hayward, 23 mi away | 24/7 | Overall |
| 2 | EnergyAid | 90 | 4.8★ (842) | Fremont, 14 mi away | 24/7 | Emergencies, Most reviews |
| 3 | California Glass and Solar | 87 | 5.0★ (28) | Campbell, 6 mi away | 24/7 | — |
| 4 | TN Electrical and Solar Services | 87 | 5.0★ (107) | San Jose, 9 mi away | Sat · Sun | — |
| 5 | Semper Solaris | 86 | 4.6★ (480) | Hayward, 20 mi away | Sat · Sun · Evenings | — |
| 6 | Infinium Solar Roofing and Electric | 86 | 4.9★ (290) | Campbell, 6 mi away | Sat · Sun · Evenings | — |
| 7 | East Bay Solar Cleaning LLC | 85 | 5.0★ (104) | Lafayette, 39 mi away | 24/7 | — |
| 8 | Solar Pro Energy Systems | 85 | 4.7★ (55) | Redwood Shores, 21 mi away | 24/7 | — |
| 9 | California Solar Care | 85 | 5.0★ (54) | Fremont, 11 mi away | Sat · Sun | — |
| 10 | Sunrun Solar | 85 | 4.4★ (281) | Milpitas, 10 mi away | Sat · Sun | — |
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 availability: 5.0★ from 418 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Fremont, 14 mi away
Ranked #2 because of its Google rating and review volume: 4.8★ from 842 Google reviews, the most Google reviews on this list (842).
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Campbell, 6 mi away
Ranked #3 because of its Google rating and availability: 5.0★ from 28 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in San Jose, 9 mi away
Ranked #4 because of its Google rating and trade focus: 5.0★ from 107 Google reviews, listed on Google as “Solar energy system service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Hayward, 20 mi away
Ranked #5 because of its Google rating and trade focus: 4.6★ from 480 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Campbell, 6 mi away
Ranked #6 because of its Google rating and review volume: 4.9★ from 290 Google reviews, 290 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Lafayette, 39 mi away
Ranked #7 because of its Google rating and availability: 5.0★ from 104 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Redwood Shores, 21 mi away
Ranked #8 because of its Google rating and availability: 4.7★ from 55 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Fremont, 11 mi away
Ranked #9 because of its Google rating and trade focus: 5.0★ from 54 Google reviews, listed on Google as “Solar energy system service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Milpitas, 10 mi away
Ranked #10 because of its Google rating and trade focus: 4.4★ from 281 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in San Jose, 7 mi away
Ranked #11 because of its Google rating and availability: 4.9★ from 148 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Fremont, 17 mi away
Ranked #12 because of its Google rating and trade focus: 5.0★ from 63 Google reviews, listed on Google as “Solar energy company”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in San Jose, 10 mi away
Ranked #13 because of its Google rating and availability: 5.0★ from 11 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Sunnyvale, 4 mi away
Ranked #14 because of its Google rating and availability: 5.0★ from 32 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Los Altos, 4 mi away
Ranked #15 because of its Google rating and availability: 5.0★ from 5 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in San Jose, 6 mi away
Ranked #16 because of its Google rating and availability: 4.4★ from 5 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Capitola, 19 mi away
Ranked #17 because of its Google rating and availability: 5.0★ from 118 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in San Jose, 9 mi away
Ranked #18 because of its Google rating and trade focus: 4.6★ from 29 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Gilroy, 33 mi away
Ranked #19 because of its Google rating and availability: 5.0★ from 241 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Campbell, 5 mi away
Ranked #20 because of its Google rating and trade focus: 5.0★ from 205 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Scotts Valley, 18 mi away
Ranked #21 because of its Google rating and availability: 4.8★ from 134 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Livermore, 29 mi away
Ranked #22 because of its Google rating and trade focus: 4.5★ from 172 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in San Jose, 8 mi away
Ranked #23 because of its Google rating and trade focus: 4.2★ from 80 Google reviews, listed on Google as “Solar energy company”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Hayward, 23 mi away
Ranked #24 because of its Google rating and trade focus: 4.9★ from 126 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Dublin, 26 mi away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 128 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency 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 230 Cupertino 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 Cupertino 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 |