| Business | Phone |
| Borrego Solar 1800 John Towers Ave # B, El Cajon 92020 | (619) 697-7183 |
| Sofranko Solar 380 Vernon Way # G, El Cajon 92020 | (619) 579-8703 |
| Natural Energy El Cajon 92019 | (619) 424-8678 |
| Jed Engineering 380 Vernon Way # F, El Cajon 92020 | (619) 401-8770 |