Shelly EM Power (kWh) always zero, but wattage (kW) reading fine - why?

[tom_l]

Can your EM reach the internet?

See:

Shelly devices are not updating Energy entity (kWh) ?!

Ok thanks for your link, i found the solution ! I use a firewall rule to restrict internet access to my Shelly and they need internet to get time and calculate kWh. Thanks !