822PS Pump Sentry is among the most advanced sump pump emergency battery backup systems available. It interfaces between a pump and its AC wall outlet. When AC utility power is present, the 822PS charges a battery and monitors the wall outlet to detect a power outage.
At the moment utility power fails, the 822PS draws energy from a battery and converts it to enable pump operation. At the same time, the 822PS resumes charging the battery to return it to full capacity in preparation for the next power failure.
For most pumps upto 1/2HP. To determine compatibility with pump. User should verify that steady-state pump current does not exceed 9A. How to Calculate Operating Time During Power Outage- Please see.
25A Start Current Capacity (3 seconds). Works with Common Marine Batteries. For Wall Mount or Surface Mount Installation.
Does Not Occupy Sump Pit Space. Designed to operate most 1/2 Hp. It has to be a deep cycle battery because the plates on an automotive one will sulfate and rot much faster over time. These can be found at most auto parts stores.