Wiring an inverter for backup power,rcd tripping

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i have had a full off grid set up installed long story but anyhow to put it shortly from my inverter is a new consumer next to it in my garage with 10mm2 cable going into my house into a 100amp manual transfer switch fitted after a 100 main switch so it makes it safe. If we have a power cut its just turn main switch off and then turn transfer from position 1 to 3 where the inverter is wired into and goes into my other new schneider consumer which was installed last year BUT the inverter trips everytime and if i set the rcd again it trips the one in the garage.the inverter is wired into the original garage consumer as the inverter as a 90amp charger built in but its turned off at the breaker and is only turned on when not inverting also the inverter as 2.4m of copper grounding rods.The sparky who wired the inverter had to go work in saudi so i cant call him back,also note if i wire a socket directly from the inverter it powers my washer,dryer,kettle no problem at all but i like the idea of using my house consumer
PLEASE HELP
 
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I think we need some pictures / drawings of exactly what you have in order to have a chance with this one, think there is a help file somewhere around here which tells you how to post images
 
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thanks
 

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the charger is fed via a SP breaker 30amp but as the inverter as got pass through BUT if the power goes it will go straight to battery's,which is no good for the person trying to fix the problem on the street so i only ever turn on to charge my batterys BUT i turn off the invert fuction as it will go into tragic circle
and this is how the inverter get its earth as well as the rods
 
Have you tried switching off the supply to the garage it must be supplied from the house CU? I would use the switch on the garage CU to ensure no neutral path exists from the house.

DS
 
The sparky who wired the inverter had to go work in saudi so i cant call him back,
Email ???

Surely you (or he) must have a wiring diagram - if not an operating manual - for something like this.

Did he just install it and bugger off?
 
Have you tried switching off the supply to the garage it must be supplied from the house CU? I would use the switch on the garage CU to ensure no neutral path exists from the house.

DS
i tried switching off the breaker to the garage but it still tripped but i disconnected the supply to the inverter and bingo my house is running off batterys BUT no earth
 

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Email ???

Surely you (or he) must have a wiring diagram - if not an operating manual - for something like this.

Did he just install it and bugger off?
all it states is 30 amp in and 30amp out but use 10mm2 to a mini consumer and 10mm2 to your loads and thats about it
 

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