How does the PSM24-BCM360S prevent deep discharge of the battery(batteries)?
The BCM monitors output voltage when the mains supply is off. When the battery voltage drops to 20VDC +/- 0.5VDC the BCM shuts off the whole system until the mains power returns. When mains power returns, the BCM turns the output back on and uses the surplus capacity from the power supply to recharge the battery.