Float voltage changing from multiplus

DIY
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1

Hello,
I have a smart lithium 12V battery, multiplus compact 12/1600 with smart dongle, BMS 12-200 and MPPT 75/15 setup in my van.
I was checking on Victron app and saw the battery temperature was 41°C, we had a hot day, but it was the evening. I realised that the MP was erratically charging up to 15amps every 20 minutes, voltage coming from MP was changing from 13,45V to 13,70V while I was in float over the night. I’ve had this variation all night.
I have a 12v fridge wired on the battery.
Is all this normal? I never realised this even I’m checking often…

Thank you

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2

It could be that your BMS is balancing the cells, which is causing the fluctuations.

Which BMS is installed?

3

Smart BMS 12-200.

Restarted the system a few hours ago, still have voltage variations, but the amp peaks don’t go above 8 amps.

Could be normal, but never noticed as much as last evening and night.

4

That looks like the fridge cycling.