TP-Link - Deco - How many Deco units can I add to my Deco mesh network?

In theory, you can add as many Deco units (could be different Deco models) to your existing Deco mesh network. In actual environment, the quantity of the Deco units in a network depends on how you connect them

In a pure Wi-Fi Backhaul network:

All the Deco units are connected through the Wi-Fi backhaul connection. In this case, we recommend no more than 10 Deco units in the network to ensure Wi-Fi performance. Also, we recommend no more than three hops in the networks.

Note: A hop is a trip that a data packet that is transferred from one Deco unit to another Deco unit.

In an Ethernet Backhaul network:

All the Deco units are connected directly through Ethernet cables or a network switch. And all the Deco units will communicate through the Ethernet connection, without the Wi-Fi Backhaul connection.

In this case, you can add as many Deco units in the network.

In a Hybrid network:

Some Deco units are connected through Ethernet, while others are connected through Wi-Fi. In this case, we recommend no more than three consecutive Wi-Fi hops in the network.