| Power supply rating | 100 to 120 V |
| Rated frequency range | 50 to 60 Hz |
| Rated current | ET-8500: 0.6 A
ET-8550: 0.7 A |
| Power consumption | Standalone copying: Approximately
17.0 W (ISO/IEC24712)
ET-8500 ready mode: approximately 7.4 W ET-8550 ready mode: approximately 7.5 W Sleep mode: approximately 0.8 W Power off mode: approximately 0.2 W |