Only pointing you to what Hager print !!
The key is understanding what is written on the devices on the board itself and understanding what each protection device in that split board does.
Looking at the front of the RCD controlling that circuit (the one to the right, adjacent to the main switch), it is clearly marked as a Type AC, specifically a Hager model CD263U, and also clearly carries the sine wave in a box symbol (under the letters "AC") confirming that it is a Type AC device.
Over current protection and series RCD protection on that circuit is provided by a 32 A RCBO, a Hager ADA332G, which itself is a problem, as there's no earth leakage selectivity between it and the RCD feeding it (both are non-time delayed 30mA trip RCDs). The ADA332G is an over current trip curve B, earth leakage Type A RCBO, which is clearly stated as not having a
smooth DC capability, only AC and
pulsating DC.
The errors on this installation, from what's been stated here are:
1. Two residual current devices appear to have been wired in series, without providing a means of selectivity, the Type AC RCD that is supplying a Type A RCBO.
2. No residual current protection seems to have been provided to cope with the smooth DC leakage that can arise from a charge point.
3. Connecting the charge point through a Type AC RCD in the board allows any DC leakage from the charge point to blind the right hand RCD, so reducing it's sensitivity or even preventing it from working, perhaps removing essential RCD protection from all the circuits on the right hand side of the board, which include the kitchen circuits, where RCD protection is very important.
4. If the installation is wired as PME, then the charge point also requires open PEN fault protection, either using an open PEN detection device or via an earth electrode. The earth electrode and associated TT earthing side of the installation, if used, must not be within simultaneous touching distance of any PME earthed exposed conducting part.
All told that installation, as it stands, is unsafe, and if I were inspecting it would code it C2, with a requirement that it be urgently put right. The reason for the C2 is really the fact that the two earth leakage devices in series, causing the risk that all the circuits fed from the right hand Type AC RCD could have no earth leakage protection in effect, due to DC blinding.
