total energy valiue lost

Georges44

I read the total energy with a linux shell script :

E=$(curl -s -X POST -d '{"id":1, "method":"Shelly.GetStatus"}' http://192.168.66.187/rpc | jq -M . | grep total | sed s/^.*\ // | sed s/,//)

And I store that value on a local server.

Last night, I get a grid failure, and then I was surprised becaus the total energy value was reset to 0. I had understand the this value was stored in cas of power fail. Did I miss something ?

gferen

had the same situation. On grid power loss, shelly 1pm plus lost overall kWh consumption. And is 0 after power restore.

On other thing shelly EM keeps consumption values even on grid power loss.

thgoebel

Both Shelly EM and Shelly 3EM have an internal battery to prevent data loss. All kinds of Shelly „PM“ are not equipped with batteries…

gferen

is there a way to somehow to keep them alive with external power source?

thgoebel

IMHO, this will end with a new design of the internal power supply of the Shelly… A much simpler way would be to use a Shelly EM instead, if this is a data critical application.

Another idea: Try to save energy data frequently to a home automation system to prevent the loss of data!