How Does 30 Amp RV Power Source Get Used with 35 Amp Converter

Updated 02/03/2026 | Published 07/29/2024

Question:

I have this same box. 25amp converter and you suggest upgrading to a 35 amp. I guess I’m too stupid but if the shore power is 30amp does this work properly? I’m a female getting a crash course in RV nightmare. I have a 1995 dodge ram 3500 cargo van conversion / coachman Saratoga- it has had previous owners who have done some reckless wiring in the camper. I am so lost in what it is I need to do.

asked by: Cher D

Expert Reply:

Hey Cher, this is a really great question. It's one that took me a second to remember how this works but basically the difference is the voltage. Without trying to get too far into the weeds of AC and DC power basically your 30 amp power source is in AC power which is 110 volt and the output of this is a higher amperage is in DC or 12 volts so that is why the math didn't seem to add up.

expert reply by: Jameson C

Jameson C.

2/3/2026

Hey Cher, how did things go with understanding the difference between your 30-amp shore power and the converter output? Your update could make it easier for others who are also sorting through RV wiring confusion.