The Anker APP is a must as activation of the device requires setting the output power through the APP. You have the option of controlling the device via WiFi or Bluetooth. We recommend using WiFi to control the device in order to remotely monitor the device's status and compatibility with other Anker smart devices. Bluetooth control does not offer these features.  If you have a smart meter, you must use a WIFI connection. The smart meter communicates via WIFI. You must also make sure that the smart meter and the Solarbank 2 E1600 Pro/Plus are connected to the same WIFI.