29 solar installers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Watertown: Kettle Moraine Heating & Air Conditioning, LLC, CR Score 59/100; 4.9★ from 4,102 Google reviews; open 24/7.
Best for emergencies (open 24/7): Edelman Heating, Cooling, Plumbing, Electric & Solar, posts 24/7 hours; ranked #2 of 29.
Most-reviewed: Guardian Home Improvements, 457 Google reviews at 4.8★, the most of 29 ranked after Kettle Moraine Heating & Air Conditioning, LLC; ranked #9.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
29 Watertown solar installers are ranked here by CR Score, from ten published factors. 6 are open 24/7, 12 open Saturdays and 6 open Sundays, based on posted hours. The median Google rating is 4.9★ across 29 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Kettle Moraine Heating & Air Conditioning, LLC | 59 | 4.9★ (4,102) | Delafield, 21 mi away | 24/7 | Overall |
| 2 | Edelman Heating, Cooling, Plumbing, Electric & Solar | 55 | 4.8★ (396) | Elkhorn, 37 mi away | 24/7 | Emergencies |
| 3 | All Energy Solar | 54 | 4.7★ (100) | Madison, 30 mi away | Sat · Evenings | — |
| 4 | Full Spectrum Solar | 54 | 5.0★ (173) | Madison, 33 mi away | — | — |
| 5 | Midwest Solar Power | 54 | 5.0★ (132) | Madison, 30 mi away | — | — |
| 6 | Drews Solar | 53 | 5.0★ (146) | Madison, 35 mi away | — | — |
| 7 | Everlight Solar | 53 | 4.7★ (372) | Menomonee Falls, 33 mi away | — | — |
| 8 | Au Solar Services LLC | 53 | 5.0★ (17) | Brookfield, 12 mi away | — | — |
| 9 | Guardian Home Improvements | 53 | 4.8★ (457) | New Berlin, 33 mi away | 24/7 | Most reviews |
| 10 | Madison Mobile Solar, LLC | 53 | 5.0★ (30) | Fitchburg, 35 mi away | — | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Ranked #1 in Watertown
Based in Delafield, 21 mi away
Ranked #1 because of its Google rating and review volume: 4.9★ from 4,102 Google reviews, the most in Watertown.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Elkhorn, 37 mi away
Ranked #2 because of its Google rating and review volume: 4.8★ from 396 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Madison, 30 mi away
Ranked #3 because of its Google rating and trade focus: 4.7★ from 100 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Madison, 33 mi away
Ranked #4 because of its Google rating and trade focus: 5.0★ from 173 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Madison, 30 mi away
Ranked #5 because of its Google rating and trade focus: 5.0★ from 132 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Madison, 35 mi away
Ranked #6 because of its Google rating and trade focus: 5.0★ from 146 Google reviews, listed on Google as “Solar energy system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Menomonee Falls, 33 mi away
Ranked #7 because of its Google rating and trade focus: 4.7★ from 372 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Brookfield, 12 mi away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 17 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in New Berlin, 33 mi away
Ranked #9 because of its Google rating and review volume: 4.8★ from 457 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Fitchburg, 35 mi away
Ranked #10 because of its Google rating and trade focus: 5.0★ from 30 Google reviews, listed on Google as “Solar energy system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in New Berlin, 36 mi away
Ranked #11 because of its Google rating and review volume: 5.0★ from 237 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in West Bend, 32 mi away
Ranked #12 because of its Google rating and trade focus: 5.0★ from 12 Google reviews, listed on Google as “Solar energy system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Milwaukee, 36 mi away
Ranked #13 because of its Google rating and trade focus: 4.9★ from 87 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Lake Mills, 12 mi away
Ranked #14 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 Madison, 36 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 37 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Waukesha, 28 mi away
Ranked #16 because of its Google rating and trade focus: 5.0★ from 14 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Madison, 30 mi away
Ranked #17 because of its Google rating and trade focus: 4.8★ from 21 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Stoughton, 31 mi away
Ranked #18 because of its Google rating and trade focus: 5.0★ from 13 Google reviews, listed on Google as “Solar energy system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Madison, 30 mi away
Ranked #19 because of its Google rating and trade focus: 4.6★ from 9 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Pewaukee, 27 mi away
Ranked #20 because of its Google rating and trade focus: 3.8★ from 9 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Beloit, 39 mi away
Ranked #21 because of its Google rating and availability: 4.4★ from 47 Google reviews, open 24/7.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Madison, 33 mi away
Ranked #22 because of its Google rating and trade focus: 4.0★ 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 Brookfield, 35 mi away
Ranked #23 because of its Google rating and trade focus: 3.7★ from 3 Google reviews, listed on Google as “Solar energy equipment supplier”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Janesville, 36 mi away
Ranked #24 because of its Google rating and trade focus: 4.9★ from 35 Google reviews, listed on Google as “Roofing contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Madison, 29 mi away
Ranked #25 because of its Google rating and trade focus: 4.0★ from 8 Google reviews, listed on Google as “Electrician”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#1 to #25 are shown in full above. Here are #26 to #29, in CR Score order; each links to its profile.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | RMZ Enterprises, LLC | 45 | 5.0★ (10) | 32 mi |
| 27 | Renew Roofing | 45 | 4.8★ (5) | 26 mi |
| 28 | Wisconsin State Energy | 43 | 5.0★ (5) | 38 mi |
| 29 | Lemberg Electric Company | 42 | 4.0★ (12) | 34 mi |
15 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 |
|---|---|---|
| Behl Fence LLC | 4.9★ (65) | In Watertown |
| Best Electric Service, Inc. | 39 mi | |
| Glass Act Exteriors | 5.0★ (45) | In Watertown |
| Hady Electric, Inc. | 4.7★ (12) | In Watertown |
| Hamilton Solar EnergyServices | 34 mi | |
| Home Team Energy Company | 34 mi | |
| Klecker's Heating & Air Conditioning Inc | 4.6★ (33) | In Watertown |
| Lehmann Electrical & Design | 36 mi | |
| Muskego Solar Energy Systems | 5.0★ (1) | 35 mi |
| Save My Roof | 4.9★ (58) | In Watertown |
| Solar Integrated Systems | 1.0★ (1) | 40 mi |
| SolarShare Wisconsin Cooperative | 34 mi | |
| Thermo-Tech Mechanical | 4.3★ (6) | In Watertown |
| US Roofing Commercial & Industrial Contractors | 5.0★ (2) | In Watertown |
| WES Engineering Inc | 5.0★ (1) | 36 mi |
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 29 Watertown 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 23, 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 Watertown 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 |