Is this battery drain normal ?

[Marlin15]

We have a new system with a total of 6 ECS4300 modules and a KH7 inverter.
We are seeing a constant drain on the battery of around 0.3 - 0.35KW above the load on the house, is that to be expected ?
I know the inverter will require some power but this seems excessive.....
You can see the issue in the picture (late in the evening so no solar to confuse the issue) - but we are seeing this all day and all night....
Thanks

[Dave Foster]

That appears high, but it’s not so easy to tell when you are looking at power samples that taken every 5 minutes, the best thing to look at is your daily / hourly stats - are you really seeing load at a flat 0.5kW and battery discharge at 0.83kW - or do they look more balanced when viewed over time, is your daily load approx what you expect etc...

Typically you would expect no more than 100-120 watts for conversion losses and in keeping the inverter / BMS / batteries running - often much less than that.

[Marlin15]

Thanks for replying - yes we do have a 'base' load of 0.5 - 0.6kw (partly due to a KOI pond running 24/7 !) but I was concerned about the battery discharging at around 0.3-0.35kw above this base value which seems high.

I'll try and take it up with Fox and se whet they say.....