ShellyRoller Energy value

Hello,
I have several Shelly Roller in Roller Shutter mode.
I use the official Shelly Firmware and CoIoT using Unicast (with the IP and port of the Home Assistant).

I wanted to check power consumption and I started displaying the entities:

- entity: sensor.shellyrollerXX_energy
- entity: sensor.shellyrollerXX_power

The “power” entity only shows data when the blinds are going up and down but, in some rollers, the energy is always showing data. In some cases the energy entity is showing 0.0 kWh, but in others from 0.03 kWh to 0.44 kWh.

An idea why?
Is this correct (and normal) or I have some calibration issue?
Thanks

Home Assistant Core Version: 2023.6.2
Shelly Firmware Version: 20221027-092056/v1.12.1-ga9117d3