Solar Thermal - what labelling, if at all?

I've been doing a couple of EICR's recently that are on a new build estate.

These houses have 2 or 3 Solar panels on the roof, from what I can find, they are solar thermal, giving a hot water feed from the panels, as well as an electric supply to the immersion heaters.

It doesnt look like they feed back into the public supply.

There is a 6A mains supply, via a 1mm T+E, to what looks, and acts like, a programmer, for controlling the hot water heating.


Obviously there is a separate supply to the premises, from the PV panels. However, it appears it does not interact at all with the public supply.


What labelling, if any, is needed for this situation, when compiling an EICR?

Obvioulsy a 'This item is connected to the PV, and needs to be disconnected there', sited at the controls/cabling from the PV, but is anything necessary at the DB?

I would say no, as the PV supply does not go near to the public supply, apart from sharing a earth via the water tank.

Any thoughts?

Thanks.