Replace the inrush current limiting (ICL) circuit
Less power. Current circuit wastes power to keep the NTCs hot.
If the main pack is disconnected from DC-DC, the HV caps will discharge, but the NTCs will still be hot for a while. When the main pack is reconnected, the ICL will not work because it’s already hot.
The NTCs probably won’t share the load evenly, which risks damaging them.
Switch to a 24V low voltage system?
I think a lot of the 12 V components we use (relays, etc) usually have 24 V variants that draw less current. This would reduce the losses from parasitic resistance.
Dynamic trim?
Replace the large capacitors with capacitor multipliers?
Some unfinished research on input filtering that may or may not be correct
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