5 solar installers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Holmen: Olson Solar Energy, CR Score 84/100; 4.9★ from 97 Google reviews.
Most-reviewed: Champion Solar, 36 Google reviews at 4.9★, the most of 5 ranked after Olson Solar Energy; ranked #3.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
5 Holmen solar installers are ranked here by CR Score, from 8 published factors. 1 open Saturdays and 1 open Sundays, based on posted hours. The median Google rating is 4.9★ across 5 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Olson Solar Energy | 84 | 4.9★ (97) | Onalaska, 7 mi away | — | Overall |
| 2 | Lydon Solar | 82 | 5.0★ (8) | Sparta, 24 mi away | Sat · Sun · Evenings | — |
| 3 | Champion Solar | 78 | 4.9★ (36) | Winona, 25 mi away | — | Most reviews |
| 4 | Solar Connection Inc. | 76 | 5.0★ (6) | Onalaska, 5 mi away | — | — |
| 5 | Lydon Drywall & Electric Inc. | 66 | 3.8★ (11) | Sparta, 24 mi away | — | — |
Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.
Scores below: based on 6 of 8 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Ranked #1 because of its Google rating and review volume: 4.9★ from 97 Google reviews, the most Google reviews on this list (97).
Based in Sparta, 24 mi away
Ranked #2 because of its Google rating and trade focus: 5.0★ from 8 Google reviews, listed on Google as “Solar energy company”.
Based in Winona, 25 mi away
Ranked #3 because of its Google rating and trade focus: 4.9★ from 36 Google reviews, listed on Google as “Solar energy company”.
Based in Onalaska, 5 mi away
Ranked #4 because of its Google rating and trade focus: 5.0★ from 6 Google reviews, listed on Google as “Solar energy company”.
Based in Sparta, 24 mi away
Ranked #5 because of its Google rating and review volume: 3.8★ from 11 Google reviews, 11 Google reviews.
Typical prices in USD, adjusted for Wisconsin with a published regional index. Each row names its basis and month.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Solar panel installation | $26,020 | $29,430 | $32,010 | Per system: about 12 kW at about $2.60 per watt, before incentives. US national range × 0.95 East North Central factor (2025 Cost vs. Value Report) | October 2026 |
We scored 5 Holmen 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 Holmen 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 |