You can define an Asset Template to associate it with the Meter Group. Then associate the template with all the assets you want to mass update using the "Apply to Existing Assets" action. The next time when you add a new meter to the group, you can run the "Apply to Existing Assets" action again to push the change to the assets.
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Viet Tran
Relia App Development & Consulting
https://relia.app------------------------------