| 1 | San Diego Gas & Electric Co. | California | 1,200 | 284K | 341,292 solar homes |
| 2 | Pacific Gas & Electric Co. | California | 536 | 1.74M | 931,269 solar homes |
| 3 | Merced Irrigation District | California | 306 | 12K | 3,623 solar homes |
| 4 | NSTAR Electric Company | Massachusetts | 292 | 307K | 89,526 solar homes |
| 5 | Massachusetts Electric Co. | Massachusetts | 262 | 438K | 114,598 solar homes |
| 6 | Hawaiian Electric Co. | Hawaii | 246 | 277K | 68,049 solar homes |
| 7 | Maui Electric Co Ltd | Hawaii | 233 | 62K | 14,440 solar homes |
| 8 | Southern California Edison Co. | California | 225 | 3.26M | 734,901 solar homes |
| 9 | City of Roseville | California | 210 | 65K | 13,542 solar homes |
| 10 | Kauai Island Utility Cooperative | Hawaii | 205 | 30K | 6,227 solar homes |
| 11 | Hawaii Electric Light Co. | Hawaii | 196 | 79K | 15,572 solar homes |
| 12 | Arizona Public Service Co. | Arizona | 148 | 1.29M | 190,481 solar homes |
| 13 | Nevada Power Co. | Nevada | 133 | 933K | 124,295 solar homes |
| 14 | Tucson Electric Power Co. | Arizona | 131 | 416K | 54,719 solar homes |
| 15 | United Power | Colorado | 129 | 103K | 13,331 solar homes |
| 16 | Atlantic City Electric Co. | New Jersey | 123 | 473K | 58,377 solar homes |
| 17 | UNS Electric | Arizona | 120 | 95K | 11,432 solar homes |
| 18 | Modesto Irrigation District | California | 115 | 105K | 11,986 solar homes |
| 19 | Potomac Electric Power Co. | District of Columbia | 114 | 292K | 33,118 solar homes |
| 20 | Electrical Dist No3 Pinal County | Arizona | 113 | 33K | 3,713 solar homes |
| 21 | Trico Electric Cooperative | Arizona | 112 | 54K | 5,993 solar homes |
| 22 | Unitil Energy Systems | New Hampshire | 106 | 24K | 2,593 solar homes |
| 23 | United Illuminating Co. | Connecticut | 106 | 261K | 27,647 solar homes |
| 24 | Sacramento Municipal Util Dist | California | 105 | 601K | 63,218 solar homes |
| 25 | Black Hills Colorado Electric | Colorado | 105 | 98K | 10,256 solar homes |
| 26 | El Paso Electric Co. | New Mexico | 103 | 97K | 10,038 solar homes |
| 27 | Valley Electric Association | Nevada | 101 | 23K | 2,293 solar homes |
| 28 | Imperial Irrigation District | California | 98 | 143K | 14,066 solar homes |
| 29 | Public Service Co of NM | New Mexico | 96 | 497K | 47,765 solar homes |
| 30 | Long Island Power Authority | New York | 93 | 1.03M | 96,042 solar homes |
| 31 | Ameren Illinois Company | Illinois | 92 | 588K | 54,323 solar homes |
| 32 | El Paso Electric Co. | Texas | 92 | 320K | 29,461 solar homes |
| 33 | Connecticut Light & Power Co. | Connecticut | 91 | 995K | 90,943 solar homes |
| 34 | Public Service Co of Colorado | Colorado | 88 | 1.38M | 121,127 solar homes |
| 35 | La Plata Electric Association | Colorado | 88 | 40K | 3,543 solar homes |
| 36 | Potomac Electric Power Co. | Maryland | 87 | 531K | 46,099 solar homes |
| 37 | Central New Mexico El Co-op | New Mexico | 85 | 19K | 1,652 solar homes |
| 38 | Orcas Power & Light Co-op | Washington | 85 | 14K | 1,197 solar homes |
| 39 | PacifiCorp | Utah | 81 | 969K | 78,639 solar homes |
| 40 | Grand Valley Power | Colorado | 80 | 18K | 1,418 solar homes |
| 41 | City of Riverside | California | 79 | 101K | 7,975 solar homes |
| 42 | Vermont Electric Cooperative | Vermont | 78 | 36K | 2,803 solar homes |
| 43 | Liberty Utilities (Granite State Electri | New Hampshire | 78 | 23K | 1,821 solar homes |
| 44 | Jo-Carroll Energy | Illinois | 76 | 17K | 1,319 solar homes |
| 45 | Otero County Electric Co-op | New Mexico | 75 | 17K | 1,242 solar homes |
| 46 | Central Hudson Gas & Electric Corp. | New York | 74 | 246K | 18,227 solar homes |
| 47 | Bartlett Electric Co-op | Texas | 74 | 12K | 917 solar homes |
| 48 | Orange & Rockland Utilities | New York | 72 | 194K | 14,015 solar homes |
| 49 | Delta Montrose Electric Association | Colorado | 72 | 33K | 2,384 solar homes |
| 50 | Public Service Co of NH | New Hampshire | 71 | 263K | 18,806 solar homes |