Writing frequency of register 37 in ESS mode 3 not according to specs

Q&A and troubleshooting
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Hi, I have an MultiPlus-II 48/3000/35-32 and set it up for ESS mode 3 (full external control loop). Firmware: 502 (latest)

I am able to drive charge/discharge using a python script running on my home automation RPi and communicating via ModbusTcp.

The manual (ESS mode 2 and 3 [Victron Energy] → p3.2a) states, I have to write register 37 at least once in every 60 seconds.

From my experience, I have to write this register at least once every 14-15s to get it working without fluctuations in the in/output.

Tried to work with (volatile) register 2700/2716 but that does not seem to work as expected as this register is ment for mode 2.

  1. Is there a volatile version of register 37 (just like 2716 for 2700) to avoid wearing out the flash?
  2. Can I somewhere decrease the write frequency needed to update register 37?

Thanks!