I use an albright relay to cut the power around 2kW, used it several times for a vesc 4.12 when it was failing to cut power with an enertion nano-x. Nano-X with VESC provides full gas permanently - Electronics (ESC, remote, batteries) - FOIL.zone
The vesc shuts down without damage so far. From developers view it is a normal situation.
Of course you should not cut the motor, always only the powersupply.
I think you should be able to cut the battery power from esc actively in some way regularly. Even under full load.
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