HTTP GET from web to use in Homey

Hello, maybe can someone help me with flow.

this web Yahooeyu 5.400kW

I need to take this number and use it in my flow,
like notification : generation today : {this number}
but I have no idea how to do it.

Will not be possible with a http request. The site needs to support download of a json file

Can’t you add your converter as a device with the help of a app, e.g Solar Panels?