Saprks when connecting battery terminal with Orion

HI all,
When i connect my last positive to the battery it always sparks and it’s not a small spark. Everything is disconnected from my load except Orion, BMS and battery protect. When i disconnect and connect again in few sec no sparks.

Is that normal or i need to worry about something, everything works but that spark is giving me concern and it shouldn’t be that big. (shunt is showing 0 amp draw so there is no load)?

Thank you

What you are seeing is normal and is caused by capacitors in the inverter. There are lots of ways to slowly charge the capacitors, which is preferable to what you’re doing.
https://communityarchive.victronenergy.com/questions/159008/pre-charge-issues.html

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