PSU SA-PE12V5A-UPSp has the conversion efficiency of more than 85%, with output over-current protection, short circuit protection, protection for battery, output voltage constant etc.
Principle 110V working, power for the load and battery are provided by electric supply, then led being green. When the power failure is provided by the battery voltage to the load, then led being red. entered the stage of storage battery voltage monitoring at the same time. When detect the battery voltage drops to 10.5V, the circuit to disconnect the load, no longer as the load power supply, prevent the battery discharge, thus protecting the service life of the battery, the system will automatically reset when mains returned to normal, to be prepared for the next time.
Using the environment: