Single DC System

There are at least two charging rates :
1. Float charge for normal use
2. Boost / Eq charge for use when the batteries have become discharged When the mains fail, battery takes over supply to the load.

Dual DC System

The Battery charger system is designed as parallel redundant system, which consists of two rectifiers and two battery banks, and can operate independently or in parallel.
There are at least two charging rates :
1. Float charge for normal use
2. Boost / Eq charge for use when the batteries have become discharged When the mains fail, battery takes over supply to the load.