Hello, I have about with the multiples fitted in it, when the boat is plugged in on shore power everything performs normally on the 230v side! but when away from shore power and the 230volt system is used the a/c output wire gets very hot. There are no bad connections and the battery bank running it is 6 x 150amp lithiums, I have checked all the wiring sizing and connections and everything is within spec? any thoughts on what may be causing the wire to get extremely hot?
That sounds dangerious... The only thing electrically that will heat wier is exess current. Your overload devic should always stop that happening, no matter the cause.
I mean no offence but if you dont have the tools or knolidge to test and diagnise this issue you should get somone qualified to check it ASAP and not use the 230V, at all, untill you have found the issue.
I suspect the last place you want to be when an elsctrical fire starts is off shore on a boat.
In theory, the wire between the inverter and your distribution board should not be able to get hot at all because the inverter would shut down on overload long before that happens. Something is very wrong and is sound serious.
With respect to diagnosis....
Check the current in the wire.
Output voltage and power of the Multi.
Do this with no loads and then all possible loads, individually.
Monitor the temperature carfully when testing, have an extinguisher to hand and do it in port but configured for motoring.
DO NOT do any of this if yu are not 100% comfortable with 230V testing or have to ask what the results shouls be.
Sorry to be blunt but this stuff can kill you in several ways, it isnt something to mess with unless you know what you are doing.
It is odd that on shore power there is no heat and everything works perfectly! it sort of points to the inverter, I'm going to check all the settings in victron connect later today as this was all set up by the previous owner! if they are correct I will get the marina to check the 230v system out for me.
many thanks for your reply
Please post what they find, I am interested to know the cause.
You might have a ground loop between the 12v dc and 230v ac wiring, so that maybe part of your dc-current is running over the neutral wire of the ac circuit. Change the ground relais setting in the multiplus and check if you see some change.
Did you find the fault?
Hi, I had all the 230v system tested and re checked! all ok and tests passed. Next we removed the inverter and checked all internal connections. Re installed and managed to get the unit to re set to factory settings. Checking the settings they were all the same as factory. Now the unit runs perfectly and no heat is generated on the output wire. Thank you for all your help and advice.
Not finding a fault is always bad, it might return. But, glad to help any time
