I have 3 meters;

1x 3080 (1 fase)

2x 3050T (3fase)

but i get only 2 meters in HA (meter 3 is not in HA)

i config it as;

sensor:
- platform: iammeter
host: 192.168.10.78
name: Meter1
- platform: iammeter
host: 192.168.10.57
name: Meter2
- platform: iammeter
host: 192.168.10.97
name: Meter3

and another question;

how can i connect them to a 3 fase victron Battery charcher

Hi, 

1 

please check whether the local ip (the device that can not connect to the HA) is accessible
And visit HTTP://{ip of that device}/api/monitorjson
then provide the result here (please hide the SN, you can replace the SN field by xxxxxxxx)

"how can i connect them to a 3 fase victron Battery charcher"

Sorry ,I am not familiar with this device ,but the basic logic is simple ,just need to clamp all 3 phase CT on the wire of the corresponding phase ,make sure the CT is in correct direction.

Power up Ua ,Ub and Uc by the corresponding phase voltage.