Calculate helper for historic values

[upbeat pier]

Hi all,

I Ihave severl devices of which i have a Enegry sensor in my HA. How i setup an integral helper for each of these devices. Unfortunately I could not a find a way to calculate the helper sensor for all values dating back in time. Is there any way to do this?

[tough stirrup]

I'm not aware of anyway to do so no. I would be interested too

[bitter lily]

You can't back-calculate them like that
You can kind of manage it with a statistics sensor - but I wouldn't rely on it