Garage supply and solar panels / battery

[Jelly_Sheffield]

Would "overkill" have been all RCBO? Or should that have been "ideal"?

It predates the widespread availability of RCBO's.

 

[aesmith]

How far is the garage from the house, and what is it made of (metal or not)?

Good point, you have to consider earthing, depending on the type of earth in the house.

If you haven't put the swa in yet to the house you can get SWA with power and data cables in it used for car chargers etc. saves a lot of mucking about if your digging trench anyway.

I'd run a duct alongside the SWA in the same trench. Pull in more data cables than you think you'll need, and leave a draw cord. Depending on the system they may need Internet access.

 

[Mikey D]

How far is the garage from the house, and what is it made of (metal or not)?

It's about a 15 metre run and it's concrete block and will be insulated box profile sheets for the roof , currently asbestos cement sheets .
The house has an earth rod for the earthing , not sure what that arrangement is called tt etc ??
Cheers for all the replies so far very helpful

 

[brightspark]

The way I would do it would be to split your incoming tails from the meter, to feed your existing house CU and a separate mini consumer unit with a main switch, and then use this to supply your SWA.

Then in the garage you can install a consumer unit with RCBO as required, appropriately bi directional rated for the solar obviously.
That way you will avoid problems with selectivity for RCDs tripping and just generally make the install easier and neater.

its a tt supply so rcd at source supply needed

 

[Misterg]

its a tt supply so rcd at source supply needed

Would the garage in such an arrangement need its own earth rod? (i.e. garage as a separate TT installation?)

(Not an electrician!)

 

[Mikey D]

its a tt supply so rcd at source supply needed

Go on explain then please

 

[brightspark]

Go on explain then please

an rcd is required at both ends prefreably time delayed 100ma at supply and a 30ma rcd at the shed

 

[Mikey D]

Thanks BS , opened up a whole can of worms now !
So looks like I'll need an earth rod at the shed end too , not sure about the RCD arrangement now what with the solar /battery stuff needing to be two way as it were .
Think I'll ask the guys that are installing that ?!