The M3-SE-PA-PR module provides regulated and conditioned power to other M3-SE modules stacked above it via the top pass-through power connector. The module also provides seamless, reliable battery power backup in the event of external DC power loss. The M3-SE-PA-PR features a remote on / off switch port allowing the unit to remove battery power from an entire stack of equipment. The M3-SE-PA-PR can use a standard NEMA electronic cord for AC power or a commercially available LEMO connector for DC input power. The module is designed to serve as the bottom module of a M3-SE stack.