This article provides information about the "set poe management static" command.

The set poe management static changes the PoE power allocation mode to static , which means the maximum power for each port is pre-configured and fixed, regardless of the connected device's needs . This is in contrast to the default class mode, which allocates power dynamically based on the connected device's power class. The maximum power is allocated to the interface even if a powered device is not connected.

Please note that if the PoE power budget for the switch is insufficient to provide maximum power to all the PoE ports, we recommend that you do not change the management mode from class to static. If you change the power management mode to static and do not change the other default settings, the PoE controller allocates maximum power to the PoE ports in the order of port number, which means PoE will be disabled on higher-numbered ports when the PoE power budget runs out. In class mode, on the other hand, the PoE controller does not allocate power to a port until a powered device is connected. The class of the connected device determines the amount of power allocated. Thus in class mode, any PoE port can be used to power a device and all the PoE ports on the switch can be used as long as the combined power demand does not exceed the PoE power budget.

You may refer the article: https://www.juniper.net/documentation/us/en/software/junos/poe/topics/task/poe-controller.html