203 solar installers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Ashton-Sandy Spring: Maryland Community Solar, CR Score 89/100; 5.0★ from 95 Google reviews; open 24/7.
Best for emergencies (open 24/7): American Home Contractors, posts 24/7 hours; ranked #2 of 203.
Most-reviewed: American Home Contractors, 3,700 Google reviews at 4.9★, the most of 203 ranked; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
203 Ashton-Sandy Spring solar installers are ranked here by CR Score, from 8 published factors. 32 are open 24/7, 116 open Saturdays and 57 open Sundays, based on posted hours. The median Google rating is 4.9★ across 203 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Maryland Community Solar | 89 | 5.0★ (95) | Columbia, 8 mi away | 24/7 | Overall |
| 2 | American Home Contractors | 89 | 4.9★ (3,700) | Washington, D.C., 5 mi away | 24/7 | Emergencies, Most reviews |
| 3 | Uprise Solar and Roofing | 88 | 5.0★ (65) | Washington, D.C., 13 mi away | 24/7 | — |
| 4 | PanelesSolaresenUSA.com | 86 | 5.0★ (153) | Elkridge, 13 mi away | Sat · Sun | — |
| 5 | EDGE Energy | 86 | 4.9★ (87) | Reston, 24 mi away | 24/7 | — |
| 6 | EDGE Energy | 85 | 4.8★ (56) | Washington, D.C., 19 mi away | 24/7 | — |
| 7 | Shanco Roofing | 85 | 4.9★ (401) | Gaithersburg, 8 mi away | 24/7 | — |
| 8 | EcoGen America | 84 | 4.8★ (9) | Columbia, 9 mi away | 24/7 | — |
| 9 | American Home Contractors | 84 | 4.9★ (2,385) | Chantilly, 29 mi away | 24/7 | — |
| 10 | GreenBrilliance | 84 | 4.4★ (371) | Herndon, 26 mi away | 24/7 | — |
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 95 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Washington, D.C., 5 mi away
Ranked #2 because of its Google rating and review volume: 4.9★ from 3,700 Google reviews, the most Google reviews on this list (3,700).
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Washington, D.C., 13 mi away
Ranked #3 because of its Google rating and availability: 5.0★ from 65 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Elkridge, 13 mi away
Ranked #4 because of its Google rating and trade focus: 5.0★ from 153 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Reston, 24 mi away
Ranked #5 because of its Google rating and availability: 4.9★ from 87 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Washington, D.C., 19 mi away
Ranked #6 because of its Google rating and availability: 4.8★ from 56 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Gaithersburg, 8 mi away
Ranked #7 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 Columbia, 9 mi away
Ranked #8 because of its Google rating and availability: 4.8★ from 9 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Chantilly, 29 mi away
Ranked #9 because of its Google rating and availability: 4.9★ from 2,385 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Herndon, 26 mi away
Ranked #10 because of its Google rating and availability: 4.4★ from 371 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Washington, D.C., 17 mi away
Ranked #11 because of its Google rating and trade focus: 4.9★ from 94 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Washington, D.C., 16 mi away
Ranked #12 because of its Google rating and trade focus: 4.9★ from 530 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Baltimore, 19 mi away
Ranked #13 because of its Google rating and availability: 4.5★ from 27 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Baltimore, 19 mi away
Ranked #14 because of its Google rating and trade focus: 4.9★ from 763 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Rockville, 11 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 Beltsville, 9 mi away
Ranked #16 because of its Google rating and trade focus: 4.8★ from 231 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Ashton-Sandy Spring
Ranked #17 because of its Google rating and trade focus: 4.9★ from 71 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Laurel, 7 mi away
Ranked #18 because of its Google rating and trade focus: 4.6★ from 839 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Columbia, 8 mi away
Ranked #19 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 Laurel, 9 mi away
Ranked #20 because of its Google rating and trade focus: 4.9★ from 43 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Washington, D.C., 21 mi away
Ranked #21 because of its Google rating and trade focus: 5.0★ from 271 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Eldersburg, 19 mi away
Ranked #22 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 Washington, D.C., 13 mi away
Ranked #23 because of its Google rating and trade focus: 5.0★ from 16 Google reviews, listed on Google as “Solar energy system service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Goddard, 16 mi away
Ranked #24 because of its Google rating and trade focus: 5.0★ from 22 Google reviews, listed on Google as “Solar energy company”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Spring Ridge, 31 mi away
Ranked #25 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.
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 203 Ashton-Sandy Spring 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 Ashton-Sandy Spring 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 |