I understand that Victron use / recommend a Type A RCD, as it protects against AC and pulsing DC residual currents. While perhaps intuitive to use an RCD that detects DC, my understanding is that for the RCD to trip on the basis of DC, then there must be both a fault in the inverter (to produce pulsatile DC) and a ground fault in an appliance (to incur a residual current fault). If this is the case, there would have to be a double point failure for the DC element of the RCD to operate.
Am I missing something?