| Rank | Company | Overall Rank | City | State | Employees | Primary Service | Total Megawatts Installed | Total Megawatts 2016 |
|---|---|---|---|---|---|---|---|---|
| 1 | First Solar | 2 | Tempe | AZ | 6,350 | Developer | 6,987,846 | 1,455.40 |
| 2 | CSW Contractors | 6 | Scottsdale | AZ | 500 | Construction Firm | 1,669,000 | 670.00 |
| 3 | DEPCOM Power | 25 | Scottsdale | AZ | 65 | EPC | 390,000 | 140.00 |
| 4 | Alpha Energy | 30 | Phoenix | AZ | 2,000 | EPC | 500,000 | 120.00 |
| 5 | Resolute Performance Contracting | 115 | Tempe | AZ | 55 | Construction Firm | 52,478 | 7.44 |
| 6 | Natural Power and Energy | 117 | Phoenix | AZ | 6 | Developer | 54,665 | 7.38 |
| 7 | Solar Topps | 121 | Phoenix | AZ | 80 | EPC | 40,000 | 7.00 |
| 8 | Premier Solar Solutions | 151 | Phoenix | AZ | 85 | EPC | 30,000 | 5.00 |
| 9 | Harmon Electric | 173 | Phoenix | AZ | 100 | Rooftop Contractor | 29,723 | 4.00 |
| 10 | PEP Solar | 251 | Phoenix | AZ | 22 | Rooftop Contractor | 9.10 | 1.80 |
| 11 | American Solar & Roofing | 257 | Tempe | AZ | 55 | Rooftop Contractor | 30.60 | 1.70 |
| 12 | SunRenu Solar | 261 | Scottsdale | AZ | 18 | EPC | 8,478 | 1.63 |
| 13 | SunHarvest Solar | 267 | Phoenix | AZ | 15 | Rooftop Contractor | 15.20 | 1.50 |
| 14 | Solar Solution AZ | 315 | Tucson | AZ | 90 | Rooftop Contractor | 3,500 | 1.10 |
| 15 | Empire Renewable Energy | 330 | Phoenix | AZ | 15 | EPC | 22,668 | 0.97 |
| 16 | Sunny Energy | 360 | Tempe | AZ | 14 | EPC | 5,092 | 0.75 |
| 17 | Arizona Energy Pros | 392 | Phoenix | AZ | 11 | Rooftop Contractor | 2,717 | 0.50 |
| 18 | The Solar Store | 393 | Tucson | AZ | 13 | Rooftop Contractor | 3,544 | 0.50 |
| 19 | Energy Solution Providers | 405 | Florence | AZ | 11 | Rooftop Contractor | 5,040 | 0.45 |
| 20 | Custom Solar and Leisure | 412 | Tucson | AZ | 9 | Rooftop Contractor | 2,196 | 0.41 |
| 21 | Cool Blew Solar & Electric | 416 | Peoria | AZ | 49 | Rooftop Contractor | 1.25 | 0.40 |