How to configure a Multi RS Solar to accept a wider AC IN frequency range?

DIY
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1

Hi everyone,

I’m working on an off grid mountain hut installation composed of the following components :

  • 6kW IREM turbine
  • 7kWc solar array
  • 3 x Pylontech US5000
  • Multi RS Solar 48/6000/100 to manage everything

Some data :

  • The turbine is connected to the Multi RS AC IN and configured as a Generator (UPS mode off and “Moderate generator load charges” option is on).
  • The turbine’s nominal output frequency is 49,67Hz with a standard deviation of 0,22Hz.
  • The turbine’s nominal output voltage is 215,9V with a standard deviation of 3,5V. [90,7% of the time we’re under 220V]
  • The AC low voltage disconnect value is 180V.

My problem is that sometimes the Multi RS disconnect the AC IN and feeds the hut with the batteries + solar power instead of using the turbine’s current meanwhile the turbine is still producing enough power to completly feed the electrical needs.

My theory is that the Multi RS disconnects the AC IN when the frequency is varying around 49,67Hz, because it’s seen as a weak AC signal (the frequency aim being 50Hz) so in order to maintain a good quality feed in current it switches to the batteries+solar.

I would like to know how to configure the Multi RS in order to make it more “tolerant” to the frequency shift ?

When the UPS mode is off what’s the frequency range allowed ?

The goal being to use the turbine as the main AC input and keep the batteries+solar for power support and as a backup in case of turbine’s failure.

Thanks for your help !

2

Hi everyone,

I did some test last week to understand the influence of frequency variation on the Multi RS choice between turbine or PV power.

Basically I switched on several household appliances in order to reach a high charge quickly and create a frequency drop.

When the frequency drops the Multi RS closes the AC IN relay cutting off the turbine and feeds the charges with PV + batteries power.

I did the same test with the "Moderate generator load charges” option disabled and saw no difference in the Multi RS behavior.

Since then during daytime, the Multi RS always feeds the charges with PV power and when after sunset turbine’s power.

This is not what should happen with AC IN Generator Mode.

I don’t understand what’s going on, your help will be really appreciated.

In attachment a csv file with 02/08/2026 data.

Data Refuge Laval 02 08 2026.csv (1,1 Mo)

3

Looks like a damaged file, i can not open the file

4

It’s a csv file comma separated value, no problem to open it on my side.

5

You can adjust some settings in the Victron RS6000 when you use a generator, seen manual section 4.12