Ontario, CA solar installation & market data
Updated May 12, 2026 By The SolarDNA Data Team
Ontario has 13,506 solar installations across 4 zip codes at a median installed cost of $4.29/W, installations down 7.8% over the trailing twelve months, and an installs-weighted Market Score of 47.
Active installations
13,506
Zip markets
4
Median cost
$4.29/W
12-mo growth
▼ 7.8%
Installers active
587
City Market Score
Great · installs-weighted across 4 zips
Best zip in Ontario scores higher than 99% of U.S. zip markets.
Versus California
How Ontario compares with the state
Installed cost
$0.03/W above
state median $4.26/W
Market score
47 vs 53
California scores 53
Share of state installs
0.60%
of 2.3M tracked statewide
Battery attach
13.7%
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: 1,110–1,356 installs (midpoint 1,233)
Trailing-12-month installs carried forward at half the observed growth rate (capped at ±30%), with a ±10% band. Not a forecast of permits or policy.
Growth & pricing
Ontario by year
1,283 installs in the trailing twelve months vs 1,392 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in Ontario
Summed across every zip in the city
| # | Installer | Installs | 12-mo | Zips | $/W |
|---|---|---|---|---|---|
| 1 | SUNPOWER | 3,451 | 131 | 3 | $4.32 |
| 2 | SUNRUN | 1,925 | 248 | 3 | $4.22 |
| 3 | SUNNOVA ENERGY | 1,041 | 0 | 3 | $3.80 |
| 4 | TESLA | 747 | 0 | 3 | $5.09 |
| 5 | VERENGO | 465 | 0 | 3 | $2.43 |
| 6 | BRIGHT OPS | 336 | 34 | 3 | $4.53 |
| 7 | COMPLETE SOLAR | 271 | 144 | 3 | $4.24 |
| 8 | G A F ENERGY | 253 | 222 | 2 | $8.48 |
| 9 | FREEDOM FOREVER | 247 | 33 | 3 | $3.96 |
| 10 | ESP CONTRACTING | 245 | 0 | 3 | $4.23 |
| 11 | SUNSTREET ENERGY GROUP | 235 | 0 | 3 | $3.28 |
| 12 | V3 ELECTRIC | 188 | 38 | 3 | $4.10 |
| 13 | LEONARD ROOFING | 150 | 0 | 2 | $2.30 |
| 14 | SUNGEVITY | 133 | 0 | 3 | $3.98 |
| 15 | SOLARMAX | 115 | 0 | 3 | $3.47 |
| 16 | SOLCIUS | 88 | 0 | 4 | $4.81 |
| 17 | SEMPER SOLARIS | 87 | 4 | 3 | $4.67 |
| 18 | TITANIUM SOLAR | 77 | 0 | 3 | $6.25 |
| 19 | SOLARA HOME ENERGY | 77 | 70 | 2 | $4.75 |
| 20 | BETTER EARTH | 71 | 0 | 3 | $5.38 |
| 21 | TITAN SOLAR | 69 | 0 | 3 | $5.16 |
| 22 | POWUR | 66 | 0 | 3 | $4.88 |
| 23 | CURRENT HOME SOLAR | 66 | 0 | 3 | $5.03 |
| 24 | B P I | 66 | 63 | 1 | — |
| 25 | SUNERGY CONSTRUCTION | 65 | 0 | 3 | $4.93 |