Breaker Box for DC Loads
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This link indicates that a standard Square D circuit breaker panel with QO breakers works for DC operation at 12 and 24 volts, but not for higher voltages. The same breakers can be used - which are rated for lower voltage than under AC operation.
https://forum.allaboutcircuits.com/threads/120v-ac-switches-fuses-breakers-for-12v-dc.91429/