Convert Wifi to Bluetooth from RS485 ?

Hello.
A solar inverter has a RS485 port where a Wifi adapter plugs-in to communicate with its manufacturer application via router and internet for reporting performance.

Is there any Bluetooth adapter from that RS485 port feature to connect directly to a 'smart' phone ? (Applications is another story)

There are Bluetooth adapters designed to connect directly to a solar inverter's RS485 port. You can check SH-B20 Bluetooth to RS485 Adapter