This weekend I saw my Trust UPS connected on AC OUT 1, switching to UPS mode a few times. The UPS switched back to AC withing the same minute.
What could be the cause for this ?
asked
UPS connected to multiplus II starts event that multiplus is working
The ups has a tighter tolerance for power fluctuations. The multiplus has a huge inductor in it as well, when some loads switch on the interaction between the power incoming, loads and that inductor would be enough to triggger the ups.
The victron accepts a wider range depending on how it is set up.
One way to prevent the power dip is to increase battery cable size to the inverter.
I have two batteries 14.3Kwh 280AH in parallel each with 50mm2 cables so losses should be very limited. Cable length is around 1.2 meter to a busbar.
Length from the busbar to the multiplus is ardound 20cm and is also 50mm2.
What I do see is that the battery changed from charging to discharging at that moment so the inverter also had to change from charging to inverting.
The data I have shows only spikes of 400w discharging . Few seconds before it was charging at around 600w.
Both values are per battery so from 1200w charging to 800w discharging.
Strange thing is that I had the ups disconnects at 12:07, 12:19, 12:40 and 13:45
So the disconnects even don't match with spikes and I didn't have issues after 13:45 even that I had more spikes like in the picture below after that time.
