Good news, You can apply load balancing to analogue meters too.
Since there is no digital meter that communicates your real-time consumption, we solve this differently.
Via current transformers (see image below), we measure the current flowing through your counter. For single-phase 1 transformer, three-phase 3 transformers.
This info is passed on to the charging station via a measuring device (see image below) and a data cable (UTP Cat6) so that active load balancing can be applied.
current transformer measuring device