Hi,
I am hoping someone is familiar with this model and might be able to assist me.
I have a completely off grid installation in Australia.
There is no Earth to Neutral bonding and the Growatt Inverter is the sole power source.
It is running from 48v LFP batteries and also has Solar panels.
There is no Grid input, the system just uses solar to charge the batteries and produce AC.
I have had one inverter running for some time with no issues.
It is wired as recommended with a 32Amp continuous 50Amp max breaker at the distribution board where it connects.
I purchased a second unit and wired this in the same way to the same distribution board and I put a 64Amp breaker downstream of these two.
I bonded the Neutral wire of the Output of both units at the distribution board, before the breaker.
If I put either unit into Single mode and operate it, it works fine, they share the same battery, but have their own Solar arrays.
The connected unit powers everything and works as before.
If I put the units into PAL mode and connect the 4 cables for load sharing and communication as per the instruction manual and then turn on one inverter breaker both units start up as usual, the first one becomes the master and the second one the slave.
Both units show they have an AC voltage but one is not connected as its breaker is off.
The other one powers everything as normal.
I can turn them off and switch the breakers and then turn them on again and the other one will power everything.
But if I turn both breakers on one of the units will either give an Error 5 for short circuit or the breaker will trip.
I can see that these are working against each other but I don't understand why.
I pulled all the wiring apart looking for a short or error, but there is nothing wrong.
I have an RCD fitted downstream in the distribution board and that does not trip during normal operation with either inverter running.
Can anyone shed any light on this?
Thanks. This is doing my head in!
I am hoping someone is familiar with this model and might be able to assist me.
I have a completely off grid installation in Australia.
There is no Earth to Neutral bonding and the Growatt Inverter is the sole power source.
It is running from 48v LFP batteries and also has Solar panels.
There is no Grid input, the system just uses solar to charge the batteries and produce AC.
I have had one inverter running for some time with no issues.
It is wired as recommended with a 32Amp continuous 50Amp max breaker at the distribution board where it connects.
I purchased a second unit and wired this in the same way to the same distribution board and I put a 64Amp breaker downstream of these two.
I bonded the Neutral wire of the Output of both units at the distribution board, before the breaker.
If I put either unit into Single mode and operate it, it works fine, they share the same battery, but have their own Solar arrays.
The connected unit powers everything and works as before.
If I put the units into PAL mode and connect the 4 cables for load sharing and communication as per the instruction manual and then turn on one inverter breaker both units start up as usual, the first one becomes the master and the second one the slave.
Both units show they have an AC voltage but one is not connected as its breaker is off.
The other one powers everything as normal.
I can turn them off and switch the breakers and then turn them on again and the other one will power everything.
But if I turn both breakers on one of the units will either give an Error 5 for short circuit or the breaker will trip.
I can see that these are working against each other but I don't understand why.
I pulled all the wiring apart looking for a short or error, but there is nothing wrong.
I have an RCD fitted downstream in the distribution board and that does not trip during normal operation with either inverter running.
Can anyone shed any light on this?
Thanks. This is doing my head in!
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