Portable Home Charger Earthing - EV

Here is the Current scenario.

I work for a company which is developing EV .

This EV is a ungrounded EV - IT system

The chassi, the motor and all the conducting parts are isolated only by Basic and Re-inforced insulation.

Now we have a Portable charger whose input is AC and O/P (48VDC) is galvanically separated from the input. The Portable charger is grounded only at the Input.

The Negative DC at the output is not Grounded.

the Charger body is all Plastic and all conducting parts are ensured Re-inforced insulation. No conductive surface. All Metal parts in the charger body is not accessible.

Question - Will this Portable charger require an RCD (Residual Current Device)?

IEC 60364, Part 4: Protection for safety, Section 41: Protection against electric shock

calls for RCD of 30mA before the socket outlet.

as per AIS-138 part-2 standard it is bit unclear.

Quoting AIS-138 Part-2

"To avoid indirect contact in case of failure of the basic and/or fault protection or carelessness by users, additional protection against electric shock shall be required. An RCD (I<30 mA) shall be provided as a part of the EV conductive supply equipment for earthed systems. The RCD shall have a performance at least equal to Type A and be inconformity with standard IEC 60364-4-41.

NOTE: In some countries, other systems of personnel protection are required. Where power supply circuits that are galvanically separated from mains and are galvanically isolated from earth, electrical isolation between the isolated circuits and earth, and between the isolated circuits and exposed conductive parts of vehicle and EVSE shall be monitored. When a fault condition related to the electrical isolation is detected, the power supply circuits shall be automatically de-energized or disconnected by the EVSE"

Any inputs is appreciated.