Derby, CT solar installation & market data
Updated October 27, 2022Older data · growth withheldProvisional score · under 500 installs By The SolarDNA Data Team
Derby has 212 solar installations across 1 zip code at a median installed cost of $3.70/W, recent growth not yet measurable, and an installs-weighted Market Score of 46.
Active installations
212
Zip markets
1
Median cost
$3.70/W
12-mo growth
—
Installers active
12
City Market Score
Great · installs-weighted across 1 zips
Best zip in Derby scores higher than 72% of U.S. zip markets.
Versus Connecticut
How Derby compares with the state
Installed cost
$0.09/W below
state median $3.79/W
Market score
46 vs 51
Connecticut scores 51
Share of state installs
0.42%
of 50.1K tracked statewide
Battery attach
0.0%
state 0.4%
Statewide momentum
▼ 5.6%
residential solar added in Connecticut, 12 months through Jul 2026
Statewide market
128.1K systems
13.6% of homes · utility-reported through Jul 2026
Growth & pricing
Derby by year
12 installs in the trailing twelve months vs 9 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in Derby
Summed across every zip in the city
| # | Installer | Installs | 12-mo | Zips | $/W |
|---|---|---|---|---|---|
| 1 | TRINITY SOLAR | 86 | 0 | 1 | $3.40 |
| 2 | SUNRUN | 26 | 0 | 1 | $3.02 |
| 3 | POSIGEN | 16 | 0 | 1 | $4.47 |
| 4 | TESLA | 13 | 0 | 1 | $5.25 |
| 5 | SUNPOWER | 12 | 0 | 1 | $4.06 |
| 6 | MOMENTUM SOLAR | 11 | 0 | 1 | $3.21 |
| 7 | SUNGEVITY | 10 | 0 | 1 | $3.73 |
| 8 | ROSS SOLAR GROUP | 7 | 0 | 1 | $4.20 |
| 9 | PUREPOINT ENERGY | 4 | 0 | 1 | $3.89 |
| 10 | CTEC SOLAR | 3 | 0 | 1 | $3.81 |
| 11 | ECOSMART HOME SERVICES | 3 | 0 | 1 | $3.44 |
| 12 | ROOF DIAGNOSTICS SOLAR | 3 | 0 | 1 | $3.32 |
Zip markets
Zips in Derby
Ranked by installations · click for the zip market
| Zip | Installs | $/W | Score |
|---|---|---|---|
| 06418 | 212 | $3.70 | 46 B |