33 solar installers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Thurmont: Key Solar Solutions, CR Score 88/100; 4.9★ from 109 Google reviews.
Best for emergencies (open 24/7): Shanco Roofing, posts 24/7 hours; ranked #4 of 33.
Most-reviewed: Got Electric, LLC, 563 Google reviews at 4.9★, the most of 33 ranked; ranked #20.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
33 Thurmont solar installers are ranked here by CR Score, from 8 published factors. 5 are open 24/7, 18 open Saturdays and 9 open Sundays, based on posted hours. The median Google rating is 4.9★ across 33 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Key Solar Solutions | 88 | 4.9★ (109) | Spring Ridge, 12 mi away | — | Overall |
| 2 | Red Rock Farms | 85 | 4.8★ (27) | Thurmont | Sat · Sun · Evenings | — |
| 3 | Celestial Solar Innovations | 83 | 5.0★ (184) | Eldersburg, 27 mi away | Sat | — |
| 4 | Shanco Roofing | 83 | 4.9★ (401) | Gaithersburg, 35 mi away | 24/7 | Emergencies |
| 5 | AC Matthews, Roofing & Exteriors | 82 | 5.0★ (46) | Frederick, 15 mi away | 24/7 | — |
| 6 | Sun Energy Consultants | 80 | 5.0★ (5) | Rockville, 37 mi away | 24/7 | — |
| 7 | Climate Control Inc | 79 | 4.8★ (40) | Chambersburg, 25 mi away | 24/7 | — |
| 8 | FREDERICK SOLAR CO | 79 | 3.7★ (6) | Frederick, 14 mi away | 24/7 | — |
| 9 | EcoSun Wash | 79 | 5.0★ (18) | Columbia, 40 mi away | Sat · Sun · Evenings | — |
| 10 | Glim Solar LLC | 79 | 4.8★ (58) | Gaithersburg, 34 mi away | Sat | — |
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: 4.9★ from 109 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 Thurmont
Ranked #2 because of its Google rating and trade focus: 4.8★ from 27 Google reviews, listed on Google as “Solar energy system service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Eldersburg, 27 mi away
Ranked #3 because of its Google rating and trade focus: 5.0★ from 184 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Gaithersburg, 35 mi away
Ranked #4 because of its Google rating and availability: 4.9★ from 401 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Frederick, 15 mi away
Ranked #5 because of its Google rating and availability: 5.0★ from 46 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Rockville, 37 mi away
Ranked #6 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 Chambersburg, 25 mi away
Ranked #7 because of its Google rating and availability: 4.8★ from 40 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Frederick, 14 mi away
Ranked #8 because of its Google rating and availability: 3.7★ from 6 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Columbia, 40 mi away
Ranked #9 because of its Google rating and trade focus: 5.0★ from 18 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Gaithersburg, 34 mi away
Ranked #10 because of its Google rating and trade focus: 4.8★ from 58 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Hampstead, 31 mi away
Ranked #11 because of its Google rating and trade focus: 5.0★ from 39 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Gettysburg, 17 mi away
Ranked #12 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Frederick, 15 mi away
Ranked #13 because of its Google rating and review volume: 4.9★ from 37 Google reviews, 37 Google reviews.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Leesburg, 36 mi away
Ranked #14 because of its Google rating and trade focus: 4.3★ from 11 Google reviews, listed on Google as “Solar energy company”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Eldersburg, 31 mi away
Ranked #15 because of its Google rating and trade focus: 4.3★ from 22 Google reviews, listed on Google as “Solar energy system service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Hagerstown, 21 mi away
Ranked #16 because of its Google rating and trade focus: 5.0★ from 30 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Hagerstown, 18 mi away
Ranked #17 because of its Google rating and trade focus: 5.0★ from 18 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Frederick, 23 mi away
Ranked #18 because of its Google rating and review volume: 5.0★ from 89 Google reviews, 89 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Chattanooga, 38 mi away
Ranked #19 because of its Google rating and trade focus: 5.0★ from 10 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Clarksburg, 23 mi away
Ranked #20 because of its Google rating and review volume: 4.9★ from 563 Google reviews, the most Google reviews on this list (563).
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Frederick, 14 mi away
Ranked #21 because of its Google rating and trade focus: 5.0★ from 6 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Owings Mills, 36 mi away
Ranked #22 because of its Google rating and review volume: 4.8★ from 154 Google reviews, 154 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Rockville, 38 mi away
Ranked #23 because of its Google rating and review volume: 4.7★ from 220 Google reviews, 220 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Charles Town, 29 mi away
Ranked #24 because of its Google rating and availability: 4.7★ from 12 Google reviews, open 7 days a week.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Rockville, 39 mi away
Ranked #25 because of its Google rating and trade focus: 1.6★ from 7 Google reviews, listed on Google as “Solar energy company”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
#1 to #25 are shown in full above. Here are #26 to #33, in CR Score order; each links to its profile.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | ARHT Home Solutions | 70 | 5.0★ (160) | 38 mi |
| 27 | Standard Solar Inc. | 70 | 4.5★ (8) | 38 mi |
| 28 | MDZ General Services | 69 | 5.0★ (12) | 39 mi |
| 29 | Thos C Johnson Inc | 68 | 4.7★ (9) | 36 mi |
| 30 | Barnhart Electric, LLC | 66 | 5.0★ (11) | 28 mi |
| 31 | Green Construction Multi Services LLC | 66 | 4.6★ (10) | 27 mi |
| 32 | Ferris Electric, Solar & General Contracting | 65 | 5.0★ (4) | 39 mi |
| 33 | Aggreko Rental Solutions - Owings Mills | 62 | 5.0★ (3) | 36 mi |
20 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 |
|---|---|---|
| American Electric Solar, LLC | 1.0★ (2) | 32 mi |
| Berkeley Home Technologies | 27 mi | |
| Carroll St Solar | 22 mi | |
| Energy Savers America | 23 mi | |
| Fesco Energy | 17 mi | |
| Home Source Solar | 21 mi | |
| J.L.Green Electric | 5.0★ (1) | In Thurmont |
| Lightility | 5.0★ (1) | 38 mi |
| McClure Company | 2.0★ (1) | 22 mi |
| Montgomery Parks Solar Field | 1.0★ (1) | 33 mi |
| Pure Solar MD | 24 mi | |
| RNR Energy Solutions | 5.0★ (2) | 37 mi |
| Solar photovoltaic power plant | 5.0★ (1) | 32 mi |
| Solar Photovoltaic System | 20 mi | |
| Solar Photovoltaic System No.2 | 20 mi | |
| Solar Shampoo Panel | 15 mi | |
| SolarwithJG | 5.0★ (1) | 39 mi |
| SONERGY USA | 13 mi | |
| TimberRock Energy Solutions | 18 mi | |
| Zolar Clean Energy | 28 mi |
Typical prices in USD, adjusted for Maryland with a published regional index. Each row names its basis and month.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Solar panel installation | $27,400 | $30,990 | $33,710 | Per system: about 12 kW at about $2.60 per watt, before incentives. US national range × 1.00 South Atlantic factor (2025 Cost vs. Value Report) | October 2026 |
We scored 33 Thurmont 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 Thurmont 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 |