Korn Posted June 26, 2013 Share Posted June 26, 2013 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!! Quote Link to comment Share on other sites More sharing options...
Energy-Jason Posted June 26, 2013 Share Posted June 26, 2013 Wow, Would a blocking diode be in order here? E Quote Link to comment Share on other sites More sharing options...
ipower Posted April 9, 2016 Share Posted April 9, 2016 EEK , my multi is used only as an inverter , but I may want to charge via the grid in future , .... can i risk it ? Quote Link to comment Share on other sites More sharing options...
KLEVA Posted April 9, 2016 Share Posted April 9, 2016 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. CasualCheetah 1 Quote Link to comment Share on other sites More sharing options...
Chris Hobson Posted April 9, 2016 Share Posted April 9, 2016 I think Korn has left the building that post was from 2013. Quote Link to comment Share on other sites More sharing options...
KLEVA Posted April 10, 2016 Share Posted April 10, 2016 Yup, only saw that now, ipower posted so saw it as a current thread, didn't look at the dates. My bad. Quote Link to comment Share on other sites More sharing options...
Chris Hobson Posted April 10, 2016 Share Posted April 10, 2016 No problem Quote Link to comment Share on other sites More sharing options...
___ Posted April 10, 2016 Share Posted April 10, 2016 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. ipower 1 Quote Link to comment Share on other sites More sharing options...
Guest Posted April 10, 2016 Share Posted April 10, 2016 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. Quote Link to comment Share on other sites More sharing options...
___ Posted April 10, 2016 Share Posted April 10, 2016 A good read on the topic of shoot-through. https://www.fairchildsemi.com/application-notes/AN/AN-6003.pdf Quote Link to comment Share on other sites More sharing options...
Energy-Jason Posted April 10, 2016 Share Posted April 10, 2016 Im sure I can contact Korn. And ask him to come tell us more. Jay Chris Hobson and ___ 2 Quote Link to comment Share on other sites More sharing options...
___ Posted April 10, 2016 Share Posted April 10, 2016 I'd love to get my hands on the broken hardware... :-) Sent from my GT-I9195 using Tapatalk Quote Link to comment Share on other sites More sharing options...
ipower Posted April 10, 2016 Share Posted April 10, 2016 Thanks guys , this is what makes this forum so amazing , downright nice guys with a willingness to assist Chris Hobson 1 Quote Link to comment Share on other sites More sharing options...
superdiy Posted April 11, 2016 Share Posted April 11, 2016 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. ipower and Chris Hobson 2 Quote Link to comment Share on other sites More sharing options...
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