The server is only one part of an IT power chain. Storage, switching, routing, authentication and security infrastructure may need to remain available for the intended operating or shutdown sequence.
Define the continuity objective
Decide whether the plan is to continue working, bridge generator changeover or shut down safely. Record the required duration and which systems must remain powered throughout that sequence. Ask the IT owner to confirm application dependencies rather than selecting capacity from a server count.
Build the dependency record
| System | Depends on | Required during outage? | Shutdown owner/order |
|---|---|---|---|
| Record actual site systems | Network, storage or other dependencies |
Include PoE switch demand and identify any recording or access-control equipment sharing the protected circuits. Document separate power paths where redundancy is required; a generic UPS selection is not a resilience design.
Review capacity, batteries and physical fit
Compare the total load with the exact UPS kW/kVA ratings. Check rack space, rails, cabinet loading, battery placement, access and ventilation. Use the rack UPS page to compare listed families, and the sizing guide to prepare the load brief.
Confirm monitoring and shutdown compatibility
Ask whether the proposed interface and software support the actual operating systems, virtualisation or management platform. Identify required cards, licences, permissions and configuration ownership. Agree how alarms are received and acted on. Do not assume a network socket or optional SNMP card establishes automated shutdown compatibility.
Agree commissioning evidence
Review installation, protection, earthing, shutdown testing and maintenance windows with authorised personnel. Retain the approved sequence, runtime assumptions, final configuration and escalation contacts. Avoid testing by disconnecting live equipment outside the agreed procedure.
Can one runtime figure describe every operating condition?
No. Runtime must state the connected load and proposed battery configuration, with operating conditions understood.
Review commercial server-room UPS options and share the dependency record.