Image CaptionMultiplus
680lifepo a/h at 12v nominal
3x MPPt smartsolar
Charge voltage spiking on mains charging.
The lower spike is because the solar kicked in…no issue.
The other spike is the problem…has happened multiple times.
Any ideas???
Mick
asked
Multiplus charging jumping to 16v regularly but I can’t find the problem
this is a guess but you may find the the batteries bms is disconnecting the batteries as its occuring when the batteries are being discharged so one cell in the bank might be flate.
anyway look at the bms at the same time it happens
I have, there is no events in the BMSs (3) that correspond with the events except shutting down the batteries for over voltage.
Thank you for your answer.
Michael
@Michael Connolly as an aid to fault finding I would reduce the absorption voltage on all charging sources by at least a volt to see if that can try to eliminate any BMS activity. I have seen BMS activity cause abrupt voltage changes (interpreted by a Quattro as DC ripple) causing all sorts of problems. You have to do something and reducing the charging voltages may help lead you to the cause of the problem.
A zoom in on the 16v event.
Yep, that is very strange alright. I have no idea why that is happening. It is over a long term so not battery BMS related I don't think.
