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Victron inverter restart surprised me. How did it know?

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ezwryder

New Member
Joined
Jun 11, 2022
Messages
60
Location
Blue Grass, VA
I’ve read that Victron inverters will shut down after a couple of failed restarts and I saw that this weekend when I mistakenly left the heat pump on and drained the battery.

In the morning when the solar chargers started up, the Multiplus II tried to restart a couple of times and then shut down. I'm sure this is because the heat pump remembered its last running state and would also attempt to restart, dragging the battery pack back down.

The system remained offline during the day. Late in the afternoon I asked a neighbor to pull the cutoff switch on the heat pump and, to my surprise, the inverter instantly restarted without having to manually reset it. (The batteries had also fully recharged.)

Does anyone know why the inverter would do that rather than require a manual reset? I am glad that it did, I am just curious why. It’s as if the inverter was monitoring what loads were attached to it, recognized the “problem load” had been removed, and then restarted.


Screenshot 2024-03-12 at 8.41.37 AM.png
 
Yes, I clearly saw the failed restarts and then the shutdown. I had one low battery alarm which happened at the point the inverter shut down.

What made me curious is that the unit restarted in the afternoon when the heat pump load was removed. My friend did not go inside and reset the inverter.
 
kommando said:
Battery voltage bounce back when the load was taken off ?
Click to expand...

ezwryder said:
The system remained offline during the day. Late in the afternoon I asked a neighbor to pull the cutoff switch on the heat pump and, to my surprise, the inverter instantly restarted without having to manually reset it. (The batteries had also fully recharged.)
Click to expand...


sunshine_eggo said:
Normal behavior is 3 failed restarts and then permanent shutdown until manually restarted.

Anything in the Alarm or Event logs?

I'd post about this over on community.
Click to expand...

The above is for any reason.
 
But sounds like he didn’t manually reset the inverter, a load breaker was just opened up.
 
sunshine_eggo said:
Right. It's not behaving consistent with the stated behavior. It should have needed a manual power cycle to the inverter power switch.
Click to expand...
I can only think that there must be some undocumented feature that monitors a change in potential loads and triggers another restart attempt. IDK, I just know it wasn't coincidence that it fired up untouched right after he pulled that disconnect.
 
By opening the disconnect, the load impedance would change even if no 120v was applied. The unit has sensing capabilities on the output so it’s possible.

Sounds like some further testing could verify if it’s a fluke or a feature.
 
740GLE said:
By opening the disconnect, the load impedance would change even if no 120v was applied. The unit has sensing capabilities on the output so it’s possible.

Sounds like some further testing could verify if it’s a fluke or a feature.
Click to expand...
That sounds right. Impedance was the word I was looking for. I wonder if there is a certain amount or if any amount would trigger it, e.g. tripping the breaker on a small circuit. It would be interesting to try but I would not go about it in the same way.
 
sunshine_eggo said:

All Posts - Victron Community

community.victronenergy.com community.victronenergy.com

The CEO, employees and professional installers are very active on that site.
Click to expand...
Well I guess I am fated not to get an answer to my question...I registered and filled out the Ask A Question form but the Captcha blocks the button to Post. Tried a couple different browsers, tried tabbing through the fields to select the Post button, all to no avail. There is obviously a lot of good info there but I am surprised at the usability issue
 
ezwryder said:
Well I guess I am fated not to get an answer to my question...I registered and filled out the Ask A Question form but the Captcha blocks the button to Post. Tried a couple different browsers, tried tabbing through the fields to select the Post button, all to no avail. There is obviously a lot of good info there but I am surprised at the usability issue
Click to expand...
I had issues there as well and gave up.
 
Did anything affect the Cerbogx or Vebus? I have a Quattro (my 12v) that if any issues needs a manual restart for some reason. I found out if I just pull the vebus cable from the cerbogx for more than 5 seconds it'll restart
 
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