On the ECC800-Pro WebUI, the PUE configuration mode can be "Standard" or "User-defined".

The Huawei ECC800-Pro Data Center Controller provides functionality to calculate and display the Power Usage Effectiveness (PUE). Within its Web User Interface (WebUI), administrators can configure how PUE is calculated. The system offers two primary modes: "Standard," which uses a default, predefined formula based on typical data center setups, and "User-defined," which provides the flexibility to customize the PUE formula by manually selecting the specific power meters that represent the total facility power and the IT equipment power.

The alternative, that these modes are not available, is incorrect. The functionality is explicitly described in the product's operational documentation as a core feature for energy efficiency management.

Huawei ECC800-Pro Data Center Controller V100R002C10 User Manual, Section: "System Settings > PUE Settings". This section details the procedure for selecting either the "Standard" or "User-defined" PUE calculation mode and configuring the associated power meters.