| Business | Phone |
| Critical Power Resource 6070 Six Forks Rd, Raleigh 27609 | (919) 844-6447 |
| Power Back-Up Corp 3200 Spottswood St, Raleigh 27615 | (919) 954-9255 |
| Invensys Energy Management 8609 Six Forks Rd, Raleigh 27615 | (919) 870-3000 |
| National Power Corp 5100 Departure Dr, Raleigh 27616 | (919) 790-1672 |