Thanks Chagrin
The cables coming from the transformer are:
Input (black cable) blue 0, brown 230v.
Output (white cable) blue 0, brown 110v.
I have contacted the manufacturer about the transformer, they confirmed that it outputs 110va current steeping down from the original 230va.
There is a fuse in the mains here in the uk, it is an equivalent of 13A.
They suggest that I run the power from the mains to the transformer and that then I connect this to an electrical junction box. This box would be connecting the transformer to each positive and negative poles of the panel.
Translating this into my project I would assume I would be following your advice by splitting the hot wire in the output cable (brown 110va) into 4 cables and have them inserted in the com of each relay.
Then the 4 negative wires as you suggested from the NO of each relay to the negative pad of each panel.
Where is the negative wire coming out of the white output cable (blue wire) supposed to go to?
I will sketch out a circuit diagram later on in the day, it would be very useful if you could review it for me.
Thanks for the suggestion related to the relay board.
Can I buy it and use it in the UK? I have seen that it is for the US market I wonder if it had the same specs.
I have found this Relay Board they sell in London, reading the specs sheet looks like it could be suitable for this type of project:
http://www.coolcomponents.co.uk/catalog/relay-module-p-926.html
Many thanks again for your help, I will use all necessary caution to avoid making a mess.
Best
Faeve