MPPT RS 450/100 - pulse current consumption

DIY
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1

MPPT RS 450/100 connected only to battery.
PV not connected.
Every 30-40 seconds, the battery consumption increases briefly (by about 200 milliseconds) to 10 amps.
Is that how it should be?
Thanks.

2

Definitively not.
Being an MPPT, the flow of energy must be only from PV array to battery.
Otherwise, I don’t find any other reason…

Or, maybe:

  1. For 0.2 seconds, from time to time, the device wants to know the state of charge of the battery ??..
    But it seems too complicated to do it this way…
  2. It needs to charge-up the high voltage DC bus capacitors, in order for a smooth functioning ??..
  3. Or a combination of the above - charging the HV capacitors will also verify SOC.
  4. Or a glitch in the firmware. :innocent:
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3

Please, look at this screenshot:
Screenshot: voltage and current graph
Congratulations!
I processed the data from MPPT RS in my monitoring program.
I connected the device to a power supply with current stabilization of 10 Amperes.
You can see the pulse consumption, as a result of which the voltage drops (because the current is limited to ten Amperes). The current on the graphs does not change. Obviously, this is due to the fact that the current sensor is located after the problem section.
That is:
battery → problem section of the circuit → current sensor → the rest of the circuit.

The device after repair.
Are there still problems, or is this normal behavior of the device?