APC SYARMXR3B3 Extended Run Cabinet, Rack-Mountable | UPS Battery

Keep essential infrastructure online longer when outage windows stretch beyond the limits of a standard UPS battery pack. The APC Extended Run Power Array Cabinet is designed for rack-mounted deployments that need additional battery capacity and more controlled runtime planning at AC 208 V. It fits naturally into environments where graceful shutdown, extended ride-through, or generator bridge time is part of the operating model. This cabinet is a practical choice for teams that cannot afford short battery windows on storage, network, or edge systems. By moving extended runtime into a dedicated rack-mountable battery enclosure, it helps preserve the UPS architecture while giving you more flexibility in how you size protection for the load. That matters when uptime is measured in business continuity, not minutes on a spec sheet. For infrastructure teams, the value is in predictability. A dedicated extended-run cabinet can simplify capacity planning, support higher availability targets, and reduce the pressure to oversize the UPS itself. It is a purpose-built component for environments where power protection has to scale with the workload.