The big + lug on the battery is on the wrong side of the contactor relay, which means it's not live unless the key is in the on position and the ECU says it's okay. Use the other side of the relay, and be careful with the high voltage. Understand how the big switch on the top of the battery works, and leave it at "OFF" except when the battery in a safe location, e.g. installed in the car with its cover on. The switch must be "ON" to run the grid charger.
The KaW was just there to record the efficiency of the charger: 84%.
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