The wireless relay only makes\breaks the low ampage feed to the circuit breaker in the Rolec. Same as switching the rolec manually.
As above, this is absolutely not the way to do this safely. The protocol is specifically designed to ensure that, other than in a power cut, the charger (in the car) shuts down gracefully (remembering that it can present a pretty hefty reactive load) and then, and only then, does the charger signal to the charge point to break the mains power connection, when there is no current flowing. This prevents the possibility of the supply just being interrupted under full load, and so eliminates the risk that there may be a big spike as a consequence of a sudden disconnection. Not unknown for chargers to fail because of this, IIRC at least one member here has had that happen and the bill was potentially quite high, of the order of £1k or so for a replacement OBC.