Thank you for choosing Deye microinverters!
Regarding Deye microinverter WIFI network, We have launched new firmware version MW3_16U_5406_1.53 (MW3_16U_5406_1.5 is available as well) on the Dec 2022 which allows the users to change the default password.
Also, when the microinverters connects to the internet successfully for 30mins, then the inverter firmware will be upgraded automatically if the firmware version is not the latest one. In addition, if you are eager to update the microinverter firmware version, please contact us via [email protected], We will handle it as soon as possible.
Below is the interface of new firmware version. It shows how to change the password.