I’ve prepared a custom component to consume the MQTT messages of the go-eCharger MQTT API v2:
I would be happy about some beta testing and support of the heavy EV charger users. 
Naming and value transformations could be improved step by step.
I’m not sure whether it’s fair to promote another integration here in this thread. On the other hand I have been waiting for an API v2 integration for quite some time and even started to directly consume the v2 API through Node RED, without a dedicated integration (which actually works quite well).
I would like to ask some questions about your new integration, but honestly I don’t want to hijack this thread. Maybe you want to open up another thread re your integration and leave a link here?
It wasn’t my intention to hijack this thread or to be unfair. 
I’ve created a new one: Custom component goecharger_mqtt - go-eCharger HOMEfix EV charger integration
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i had the same problem… follow your instruction works