Using an inverter on an auto change over switch. (11 Viewers)

[Leejohn02]

At present i purchased a changeover switch and have wired it up to the inverter and then to fuse board. The issue i'm having is that when i'm off grid the van is basically trying to charge itself and doing what i believe is called a death loop. I have been looking at current sensing switches but i can't find one with a large enough amperage and connectors for the 12v. I have no way of turning off the transformer/emitter as its being used for everything else as well, and there is no way to isolate the battery charger specifically. Welcome any suggestions , i have attached a photo too show what i mean too, thanks for any suggestions

 

[Cush]

There must be a way to disable the onboard charger. If you can provide details of the power supply unit, someone will be able to help.

Having a quick google, it looks like an EBL 99. Someone one here will know

 

[eddie]

You simply need to ‘move’ the automatic changeover switch to the 13amp sockets.

So default closed would be mains, when inverter is turned on, trans fare switch would ‘switch’ supply to the sockets

Loads of diagrams on the forum if your unsure

 

[DBK]

As Eddie says, the changeover switch should be on the 240v side. You need to find which cable or cables go to the sockets downstream of the consumer unit/RCDs and put the relay there.

In my signature below there's a link to how I did this. The tricky bit was finding the correct relay as I got this wrong initially, not noticing relays can have different ratings for making or breaking the circuit.

I would have a heavy duty manual switch on the 12v supply to the inverter so you can properly isolate it, otherwise it will continue to draw a small current all the time.

 

[TrudeandDall]

Exactly as Eddie says - feed only the socket radial circuits from the changeover switch.

^{_{Subscribers  do not see these advertisements}}

 

[Leejohn02]

You simply need to ‘move’ the automatic changeover switch to the 13amp sockets.

So default closed would be mains, when inverter is turned on, trans fare switch would ‘switch’ supply to the sockets

Loads of diagrams on the forum if your unsure

So this is the part i'm not understanding, when i initially tested the RCD and switched it off, the power completely turned off including all the 12v supply, when i press the switch for 12v/230v all the 12v comes on. We only have 1 breaker on the RCD which seems to do everything. The issue is, if i put the power on from the inverter on the 230v rail it blows the fuse on the emitter/transformer in 12v mode. So i need to find a way to cut the power to just the battery charger part from the emitter to the batteries, i could add a manual switch if i really must, but would much rather it be automatic. Hence me thinking a sensor switch could work if i could find the right sized one. I have attached a pic of the emitter we currently have a a digram of the electrical schematics which should hopefully show what i mean