Before we start the article, we can tell you clearly that PoE equipment is not free.
Power over Ethernet (PoE) technology itself is not free. PoE technology is a standard for transmitting power and data over Ethernet. It allows devices to be powered through network cables without the need for additional power outlets.

However, using PoE technology needs special equipment. This includes PoE switches and powered devices (PDs).
Although some resources such as the "PoE Technology White Paper" can be obtained for free. These resources are mainly for helping users understand and use PoE technology. They do not provide actual PoE equipment or services. Therefore, users need to purchase or rent related PoE equipment and components to implement PoE technology.
So PoE equipment is not free, but some related resources may be available for free.