UK Three phase supply into single phase board

Hi

I popped round to quote for ‘ finishing ‘ a solar install started by a company rhyming with Bird of Polar . The house has a three phase supply, but it looks like someone has taken the three live tails into board not designed for three phase (albeit with a three pole switch).
They’ve only got one phase to the house on a 63A breaker, the house (very large detached property ) demand looks like it would be much more than that. In fact they have a consumer unit with 24 ways inside including a 7kW EV charger, large electric hob and heat pumps
Doesn’t look they have made any effort to balance. And even if I ignore all of that, I would want to use a three phase inverter, and so would want to go to a three phase board.

Am I overthinking this, and this setup is ok, although I’m thinking we need to put in a three phase panel, and then also consider how we provide ongoing supply to main house DB (and summer house)

I suspect that whatever I say is not going to go down well with client, as they’ve already paid some £11k to the now defunct solar company, and all they have done is put solar panels (18x 440W) on roof.

The board was apparently put in by builders electrician.

Is it not a type "A" board, something like this

oscar21 said:

Is it not a type "A" board, something like this

https://www.cef.co.uk/catalogue/products/1487202-4-way-tp-n-type-a-distribution-board-c-w-100a-switch-disconnector

Click to expand...

Might be one with three pole rather than 4 pole - didn’t think of that - thanks
But still looks they have almost all the load on one phase, with a 63A mcb for the entire house. (Which could be argued is not my problem, if I’m only quoting for solar work completion)

All looks a bit out of kilter I think it should be a double pole switch judging by the Main Switch label with the space to the right if a double pole were fitted for the SPD.

Mindgirl said:

But still looks they have almost all the load on one phase

Click to expand...

Agreed but difficult with just 4 different single phase circuits but looks like phases are loaded L1 = 16A, L2 = 50A and L3 73A The 10A circuit could go onto L1 to help balance but not a great deal.

Has the cover been removed, is it TP bussbar?

I fitted one as @oscar21 linked to a few months ago, it was actually a nice board and with the TP RCBO's made an excellent job!