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| Model SF512 | Model 503B |
| Technical Info | Technical Info |
| Normal Mode Operation | Model 512 | Model 503B | |
|---|---|---|---|
| Input Voltage Range: | 100-128 VAC | 100-128 VAC | |
| Input Current (max.): | 5.5A | 7A | |
| Charging Current (max.): | 12A | 12A | |
| Recharge Time (max.): | 13 Hours | 13 Hours | |
| FOR A 90 A-HR. BATTERY DISCHARGED TO 10.5 VDC Backup Mode Operation: | |||
| Maximum Backup Power: | 550 Watts | 750 Watts | |
| Maximum Input Current: | 55A | 70A | |