St. Mary's County, MD solar installation & market data
Updated December 27, 2022Older data · growth withheldProvisional score · under 500 installs By The SolarDNA Data Team
St. Mary's County has 159 solar installations across 17 zip codes at a median installed cost of $3.35/W, recent growth not yet measurable, and an installs-weighted Market Score of 52.
Active installations
159
Zip markets
17
Median cost
$3.35/W
12-mo growth
—
Installers active
0
County Market Score
Excellent · installs-weighted across 17 zips
Best zip in St. Mary's County scores higher than 99% of U.S. zip markets.
Versus Maryland
How St. Mary's County compares with the state
Installed cost
$0.36/W below
state median $3.71/W
Market score
52 vs 68
Maryland scores 68
Share of state installs
0.51%
of 31.5K tracked statewide
Battery attach
0.0%
state 0.0%
Statewide momentum
▲ 35.7%
residential solar added in Maryland, 12 months through Jul 2026
Statewide market
127.7K systems
7.8% of homes · utility-reported through Jul 2026
Growth & pricing
St. Mary's County by year
107 installs in the trailing twelve months vs 52 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in St. Mary's County
Summed across every zip in the county
| # | Installer | Installs | 12-mo | Zips | $/W |
|---|
Zip markets
Zips in St. Mary's County
Ranked by installations · click for the zip market
| Zip | Installs | $/W | Score |
|---|---|---|---|
| 20650 | 47 | $3.10 | 53 A |
| 20619 | 24 | $2.97 | 54 A |
| 20653 | 24 | $3.68 | 51 A |
| 20636 | 15 | $2.90 | 54 A |
| 20659 | 15 | $3.78 | 50 B |
| 20684 | 10 | $4.09 | 49 B |
| 20634 | 8 | $2.74 | 55 A |
| 20622 | 5 | $4.72 | 46 B |
| 20620 | 2 | $3.91 | 49 B |
| 20692 | 2 | $2.55 | 56 A |
| 20630 | 1 | $2.64 | 55 A |
| 20667 | 1 | $2.40 | 56 A |
| 20674 | 1 | $6.11 | 39 C |
| 20626 | 1 | $6.61 | 38 D |
| 20687 | 1 | $1.90 | 58 A |
| 20690 | 1 | $2.77 | 55 A |
| 20624 | 1 | $5.31 | 43 C |