Posted June 26, 201312 yr Just a word of warning, do not use a Victron Multiplus or Quattro with a Morningstar controller on the same system. It seems that the Victron pushes back current into the Morningstar controller at night when the Victron starts charging the batteries. Look at the attached pictures to see what happens when it does happen!!
April 9, 20169 yr EEK , my multi is used only as an inverter , but I may want to charge via the grid in future , .... can i risk it ?
April 9, 20169 yr Korn, I own neither of those, but it might be helpful if you can provide a bad/good wiring situation. You are just saying "don't", but not explaining how it was used/connected... None of us want to make a similar mistake, so can you give us more technical information? PS: Sorry for your loss/damage.
April 10, 20169 yr Yup, only saw that now, ipower posted so saw it as a current thread, didn't look at the dates. My bad.
April 10, 20169 yr Must say, I am still curious why this happened. Assuming it was an MPPT controller (and not PWM), and that it used a synchronous Buck converter, my guess would be that what we have here is "shoot through", a condition that happens when both the top and bottom MOSFET is turned on simultaneously, causing a dead short. I read a lot about how this can happen accidentally, though don't understand the half of it. I would guess that perhaps the Victron charger has somewhat of a ripple on the output (all chargers have that) and that enough of this ripple made it into the Morningstar, pushing the FETs into conduction. This might not be solely the fault of the Victron charger's "poor ripple" (I doubt it has a poor ripple), it might have to do with internal resistance of the batteries, cables, how things were wired, etc. I would think that if you have a PWM controller, you're probably safe. PWM controllers can have a diode between them and the battery too, I recall TTT posted wiring diagrams to that effect some time ago.
April 10, 20169 yr iPower ... VERY NICE SETUP! Jip, I also think there was more to this story. Morningstar has been around for a very long time, so I am rather sure they would not want their controller to burn out if a wee bit of charging takes place. 16 hours ago, ipower said: EEK , my multi is used only as an inverter , but I may want to charge via the grid in future , .... can i risk it ? Email Morningstar.
April 10, 20169 yr A good read on the topic of shoot-through. https://www.fairchildsemi.com/application-notes/AN/AN-6003.pdf
April 10, 20169 yr I'd love to get my hands on the broken hardware... :-) Sent from my GT-I9195 using Tapatalk
April 10, 20169 yr Thanks guys , this is what makes this forum so amazing , downright nice guys with a willingness to assist
April 11, 20169 yr 15 hours ago, ipower said: Thanks guys , this is what makes this forum so amazing , downright nice guys with a willingness to assist Oh, by the way, welcome to the forum.
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