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EASun ISolar SM II 5kw - After restart different settings


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Dear all,

I had today an issue which caused my inverters to perform a restart while I was not at home (some clocks displayed the default 12:00 am). Everything was running fine despite my rollershutters. During trouble shooting I had to discover that the inverters changed from 50hz to 60hz after they restarted themselves. I can see in the log of my solar monitoring software. Is this a known issue and how can I prevent it, that after restart the settings are changed?

Here everything was fine....

23.04. 12:16:17 MQT-solaranzeige/wr3/modus -> B
23.04. 12:16:17 MQT-solaranzeige/wr3/devicestatus -> 3
23.04. 12:16:17 MQT-solaranzeige/wr3/warnungen -> 00000100000000000000000000000000
23.04. 12:16:17 MQT-solaranzeige/wr3/set_grid_rating_voltage -> 230.0
23.04. 12:16:17 MQT-solaranzeige/wr3/set_grid_rating_current -> 21.7
23.04. 12:16:17 MQT-solaranzeige/wr3/set_ac_output_rating_voltage -> 230.0
23.04. 12:16:17 MQT-solaranzeige/wr3/set_ac_output_rating_frequency -> 50.0
23.04. 12:16:17 MQT-solaranzeige/wr3/set_ac_output_rating_current -> 21.7
23.04. 12:16:17 MQT-solaranzeige/wr3/set_ac_output_rating_apparent_power -> 5000
23.04. 12:16:17 MQT-solaranzeige/wr3/set_ac_output_rating_active_power -> 5000
23.04. 12:16:17 MQT-solaranzeige/wr3/set_battery_rating_voltage -> 48.0
23.04. 12:16:17 MQT-solaranzeige/wr3/set_battery_re-charge_voltage -> 48.0

This was after the restart....

23.04. 12:17:08 MQT-solaranzeige/wr1/modus -> S
23.04. 12:17:08 MQT-solaranzeige/wr1/devicestatus -> 2
23.04. 12:17:08 MQT-solaranzeige/wr1/warnungen -> 00000100000000000000000000000000
23.04. 12:17:08 MQT-solaranzeige/wr1/set_grid_rating_voltage -> 230.0
23.04. 12:17:08 MQT-solaranzeige/wr1/set_grid_rating_current -> 21.7
23.04. 12:17:08 MQT-solaranzeige/wr1/set_ac_output_rating_voltage -> 230.0
23.04. 12:17:08 MQT-solaranzeige/wr1/set_ac_output_rating_frequency -> 60.0
23.04. 12:17:08 MQT-solaranzeige/wr1/set_ac_output_rating_current -> 21.7
23.04. 12:17:08 MQT-solaranzeige/wr1/set_ac_output_rating_apparent_power -> 5000
23.04. 12:17:08 MQT-solaranzeige/wr1/set_ac_output_rating_active_power -> 5000
23.04. 12:17:08 MQT-solaranzeige/wr1/set_battery_rating_voltage -> 48.0
23.04. 12:17:08 MQT-solaranzeige/wr1/set_battery_re-charge_voltage -> 44.0

I just discovered, that it changed also the values for

modus from SBU to SOL

bat_recharge_voltage from 48.0 to 44.0

Thanks for your help!

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Whenever you change settings from the front panel, or from *most* commands, the changes are written to EEPROM, which is non-volatile. So the changes should live through a reset.

It might be that whatever happened was so traumatic that settings were corrupted, and everything went back to defaults.

There is a command, PSAVE, that saves all the user-accessible settings to EEPROM. It might be worth trying that command once everything is set up as you want it, if you have suitable facilities.

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Thanks guys for your insights! The frequency change was the biggest problem, espacially as my USV for my IT rack was not accepting the "new" power and was running on battery until it shut down...

So the question remains, what could cause this behaviour?

  • It was a perfect sunny day
  • batteries already fully loaded
  • only a normal load connected
  • inverter temperatures fine
  • ...

As you can see (Leistung = power, Spannung = voltage, Last = load):

grafik.thumb.png.f8d3aab63d8f0950e86cf8fd1303b645.png

And how can I prevent this from happening again?

Thanks!

 

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