Solax X3 G4 15kW hybrid inverter consumes 50% more energy when working with PV or battery

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hello, is this normal behaviour with under load power consumption ?
I have some crypto mining equipment. Let's say I can archieve 2kW consumption whole day using no other stuff.
So it would consume 48kWh during 24hrs period.

Now I have Solax X3 G4 Hybrid 15kW inverter + 10.4kWh battery and about 19kW solar panels.

during night and with empty battery load showing on Solax App is about 2kW... but when sun coming or working from battery consumption showing is rising up to 50%
I assume Solax is consuming power during DC->AC conversion but it seems to be 50% !!!

Today I did some testing and left usage 1.5kW since 3pm and FULLy loaded battery. Battery lasted till 10pm.
during power usage from battery - power consumption (load) was showing 2200Watts. When battery discharched and solax inverter went to standby mode
- power consumption changed to 1500W.

Any idea what is wrong ? Or is this normal ? I don't think so?
I know Solax APP is not good to see power usage but I can create constant power usage environment and it is like that...

 

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This is when power was from battery (for few hours)

 

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And this is when Inverter went to standby mode under same power load in my house...