New Castle County, DE solar installation & market data
Updated December 23, 2024Older data · growth withheld By The SolarDNA Data Team
New Castle County has 4,994 solar installations across 30 zip codes at a median installed cost of $4.44/W, recent growth not yet measurable, and an installs-weighted Market Score of 48.
Active installations
4,994
Zip markets
30
Median cost
$4.44/W
12-mo growth
—
Installers active
28
County Market Score
Great · installs-weighted across 30 zips
Best zip in New Castle County scores higher than 96% of U.S. zip markets.
Versus Delaware
How New Castle County compares with the state
Installed cost
$0.01/W below
state median $4.45/W
Market score
48 vs 31
Delaware scores 31
Share of state installs
59.36%
of 8.4K tracked statewide
Battery attach
0.0%
state 0.0%
Statewide momentum
▼ 77.1%
residential solar added in Delaware, 12 months through Jul 2026
Statewide market
15.4K systems
5.1% of homes · utility-reported through Jul 2026
Growth & pricing
New Castle County by year
674 installs in the trailing twelve months vs 868 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in New Castle County
Summed across every zip in the county
| # | Installer | Installs | 12-mo | Zips | $/W |
|---|---|---|---|---|---|
| 1 | SUNGEVITY | 84 | 0 | 15 | $4.66 |
| 2 | LIBERTY SERVICES | 70 | 0 | 13 | $3.49 |
| 3 | ADVANCED SOLAR | 39 | 0 | 10 | $3.83 |
| 4 | CMI SOLAR ELECTRIC | 35 | 0 | 7 | $6.06 |
| 5 | TESLA | 34 | 0 | 13 | $5.19 |
| 6 | KW SOLAR SOLUTIONS | 30 | 0 | 9 | $4.79 |
| 7 | SUNTRICITY | 22 | 0 | 8 | $6.00 |
| 8 | LIBERTY ELECTRIC | 9 | 0 | 8 | $3.36 |
| 9 | FLEXERA | 8 | 0 | 6 | $4.96 |
| 10 | WISE POWER SYSTEMS | 3 | 0 | 2 | $5.38 |
| 11 | TERRASOL ENERGIES | 3 | 0 | 2 | $3.76 |
| 12 | PSC SOLAR SOLUTIONS | 3 | 0 | 3 | $6.30 |
| 13 | CLEAR HORZON | 2 | 0 | 2 | $3.39 |
| 14 | JANVIER ELECTRIC | 2 | 0 | 1 | $1.79 |
| 15 | ECO SOLAR SOLUTIONS | 2 | 0 | 2 | $3.16 |
| 16 | CLEAN ENERGY USA | 2 | 0 | 2 | $7.78 |
| 17 | AU SOLAR 1 | 1 | 0 | 1 | $5.10 |
| 18 | SWEETEN SOLAR | 1 | 0 | 1 | $2.61 |
| 19 | TRINITY SOLAR | 1 | 0 | 1 | $6.14 |
| 20 | DALE W DAVISCMI | 1 | 0 | 1 | $4.06 |
| 21 | CNC SOLAR | 1 | 0 | 1 | $2.88 |
| 22 | DELAWARE RENEWABLE ENERGY | 1 | 0 | 1 | $7.95 |
| 23 | ECLIPSE ENERGY | 1 | 0 | 1 | $6.73 |
| 24 | SWEETIN | 1 | 0 | 1 | $7.20 |
| 25 | BLUE SKIES SOLAR | 1 | 0 | 1 | $6.19 |
Zip markets
Zips in New Castle County
Ranked by installations · click for the zip market
| Zip | Installs | $/W | Score |
|---|---|---|---|
| 19709 | 871 | $3.87 | 52 A |
| 19701 | 685 | $4.34 | 49 B |
| 19720 | 556 | $4.90 | 46 B |
| 19702 | 549 | $4.31 | 49 B |
| 19711 | 350 | $4.80 | 45 C |
| 19734 | 298 | $4.20 | 48 B |
| 19808 | 286 | $4.66 | 46 B |
| 19713 | 258 | $4.53 | 46 B |
| 19810 | 184 | $4.35 | 47 B |
| 19707 | 175 | $4.35 | 47 B |
| 19803 | 156 | $4.05 | 48 B |
| 19805 | 130 | $5.00 | 43 C |
| 19804 | 112 | $5.00 | 43 C |
| 19703 | 92 | $4.86 | 44 C |
| 19809 | 73 | $5.00 | 43 C |
| 19802 | 59 | $5.13 | 42 C |
| 19807 | 59 | $4.82 | 44 C |
| 19801 | 34 | $5.00 | 43 C |
| 19806 | 25 | $4.97 | 43 C |
| 19706 | 18 | $5.00 | 43 C |
| 19730 | 7 | $5.49 | 40 C |
| 19850 | 4 | $5.93 | 38 D |
| 19731 | 3 | $3.20 | 51 A |
| 19880 | 2 | $9.56 | 36 D |
| 19708 | 2 | $5.06 | 42 C |
| 19710 | 2 | $8.40 | 36 D |
| 19736 | 1 | $9.38 | 36 D |
| 19733 | 1 | $3.25 | 51 A |
| 19716 | 1 | $6.19 | 37 D |
| 19714 | 1 | $2.86 | 53 A |