UPS & Power Knowledge Centre

Dell PowerEdge vs HPE ProLiant vs Lenovo ThinkSystem

Practical comparison framework for Dell PowerEdge, HPE ProLiant and Lenovo ThinkSystem business servers.

Technical guide to hot-swap server drives and power supplies, redundancy requirements and safe replacement planning.

Learn how to estimate the UPS capacity required for servers, switches and other IT equipment.

Practical guide to choosing a server cabinet based on rack height, depth, equipment, airflow, power and future expansion.

Practical guide to choosing an uninterruptible power supply for servers, networking equipment and business infrastructure.

Practical guide to planning a server rack including equipment layout, power, cabling, airflow, access and future expansion.

Practical guide to server rack power protection using UPS systems, PDUs, cabling and sensible infrastructure planning.

Understand the practical differences between online double-conversion and line-interactive UPS systems.

Detailed Power over Ethernet guide covering active PoE, passive PoE, 802.3af, 802.3at, 802.3bt, power budgets and Ubiquiti deployment considerations.

Guide to server PSU redundancy, A/B power feeds, UPS and PDU design, matching PSUs and real failure tolerance.

Understand the main forms of server redundancy and how they reduce the impact of component failures.

Understand what affects UPS runtime and why battery capacity, load and operating conditions matter.

Worked example for sizing a UPS using watts, VA, headroom, runtime and rack power distribution.

Understand the difference between a UPS and an inverter and when each type of power system may be appropriate.

Understand the difference between VA and watts and why both matter when selecting a UPS.

Understand what a PDU does in a server rack and how it fits into rack power distribution.