Rancho Cucamonga, CA 91739 solar market data
Updated April 16, 2026 By The SolarDNA Data Team
Rancho Cucamonga 91739 has 3,690 solar installations at a median installed cost of $3.87/W, installations up 22.0% over the trailing twelve months, and a Market Score of 56 — higher than 98% of U.S. zip markets.
Zip Market Score
Excellent · higher than 98% of zips
Versus California
How 91739 compares with the state
Installed cost
$0.40/W below
state median $4.26/W
Market score
56 vs 53
California scores 53
Share of state installs
0.16%
of 2.3M tracked statewide
Battery attach
18.8%
state 12.7%
Statewide momentum
▲ 1.1%
residential solar added in California, 12 months through Jul 2026
Statewide market
2.3M systems
30.9% of homes · utility-reported through Jul 2026
Next-12-month outlook: 214–266 installs (midpoint 240)
Trailing-12-month installs carried forward at half the observed growth rate (capped at ±30%), with a ±11% band. Not a forecast of permits or policy.
Growth & pricing
91739 by year
216 installs in the trailing twelve months vs 177 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in 91739
Ranked by systems recorded in this zip
| # | Installer | Installs | 12-mo | Avg kW | $/W |
|---|---|---|---|---|---|
| 1 | TESLA | 623 | 45 | 8.82 | $4.33 |
| 2 | SUNRUN | 433 | 47 | 8.95 | $4.10 |
| 3 | LEONARD ROOFING | 265 | 0 | 3.31 | $2.28 |
| 4 | SUNPOWER | 132 | 0 | 6.23 | $4.43 |
| 5 | SOLARMAX | 101 | 0 | 8.23 | $3.36 |
| 6 | SUNGEVITY | 91 | 0 | 7.63 | $3.97 |
| 7 | BRIGHT OPS | 84 | 9 | 8.71 | $4.09 |
| 8 | FREEDOM FOREVER | 61 | 8 | 10.58 | $3.74 |
| 9 | RGS ENERGY | 58 | 0 | 4.13 | $2.52 |
| 10 | V3 ELECTRIC | 46 | 6 | 7.27 | $3.78 |
| 11 | PETERSENDEAN | 44 | 0 | 8.07 | $3.74 |
| 12 | VERENGO | 44 | 0 | 6.44 | $5.53 |
Neighboring zips
The nearest zip markets
By distance between zip centroids
| Zip | Distance | Installs | $/W | Score |
|---|---|---|---|---|
| 91737 Rancho Cucamonga | 6.3 km | 1,916 | $4.07 | 61 |
| 91701 Rancho Cucamonga | 8.4 km | 2,764 | $4.25 | 51 |
| 92336 Fontana | 9.5 km | 12,279 | $4.22 | 48 |
| 92358 Lytle Creek | 9.5 km | 48 | $4.00 | 40 |
| 91729 Rancho Cucamonga | 9.9 km | 15 | $3.57 | 42 |
| 91730 Rancho Cucamonga | 9.9 km | 2,511 | $4.20 | 57 |
Same city
Other zips in Rancho Cucamonga
Equipment
What gets installed in 91739
Share of systems with a recorded brand
Modules
QCELLS NORTH AMERICA19.0%
SUNPOWER9.2%
CSI SOLAR5.9%
LONGI GREEN ENERGY TECHNOLOGY5.6%
HYUNDAI ENERGY SOLUTIONS5.6%
Inverters
ENPHASE ENERGY37.6%
SOLAREDGE27.2%
SUNPOWER6.4%
TESLA6.2%
SMA AMERICA6.1%
Frequently asked
Quick answers about 91739
How many solar installations are there in 91739?
SolarDNA counts 3,690 active solar installations in Rancho Cucamonga 91739, 3,668 of them residential, with data through April 16, 2026.
How much does solar cost in 91739?
The median residential system in 91739 cost $3.87 per watt over the trailing twelve months, $0.40/W below the California median.
Is solar growing in 91739?
Installations in 91739 are up 22.0%: 216 in the trailing twelve months versus 177 before.
Who installs solar in 91739?
TESLA, SUNRUN, LEONARD ROOFING lead the 413 installers with systems in 91739. The full comp set is above.
Is 91739 a good market for solar sales?
91739 scores 56 out of 100 (Excellent, higher than 98% of U.S. zip markets).