Stiebel Elton Water Boiler non Smart Device get Energy Usage

Hi,
I have have Stiebel Elton non Smart Water Boiler I would like to get the energy usage from. Anyone else having this device or knows how I could do that? There is no plug like for the water boiler in the kitchen so I would need to get the info I think with adding hardware to the device but not sure.

It blinks inside regularly but not sure if that shows energy usage.