Pay little attention to the amp rating. Make it what you need if replacing the whole box.

No fuses, no breakers, just the empty distribution box and the 12v inverter. The only difference between the 30 amp and larger amp boxes is the bracket on which the circuit breakers clamp. Easy enough to change out. Came with a long enough bracket for 5 breakers. Swapped out the bracket from my old one so it can hold 5 breakers instead of the 3 in it. The part I needed was the inverter. My rig was not getting 12 v out of the box. I left all the wiring untouched. Swapped out the inverter and upgraded the breakers as above. Carefully connected the red & white 12 v cables from the inverter. Then carefully reattached the breakers and the white and green to neutral & ground. Last, connected the black wire to the circuit breaker. Flipped the breaker switches and everything worked perfectly.

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