To just clarify on my previous point- a single pole RCBO should not be used rather than I initially said an RCD should not be used.
So if your charger has an RCD DD with in it there is no requirement for other RCD protection…..
RDC-DD (Residual Direct Current – Disconnecting Device). will often be built within the car charging equipment to monitor and and disconnect should any DC problems appear on the AC side of the installation, which could affect the operation of RCDs. If the charger does not have this it shall be protrcted by a 30Ma type B RCD. Depending on the situation a Type A may be used.