RV Tech’s Ultimate Guide to the Converter, Part 1: How It Works

Your converter is the humming heart of your RV electrical system. Without a converter, you’re dead in the water.

Unfortunately, most people don’t take the time to ask questions about their RV converter until it ain’t working (or so they think). If that’s you, sorry about your situation! At least you have cell service, right??

Electrical Stuff You Need to Know First

PowerMax 55-amp deckmount converter installed behind RV wiring harness

You don’t need to be an electrical engineer to understand how your RV converter works, but you must know the basics!

7 responses to “RV Tech’s Ultimate Guide to the Converter, Part 1: How It Works”

  1. I have an off grid camp.
    Most times I run on 10kw inverter from 48v (4*200ah) battery charged by solar.

    The q.

    When I use my duramax generator (rare) the rv battery will charge around 35A.
    When AC is supplied by split phase inverter, it runs at 1/2 output (15 – 17A)

    Everything in the trailer works fine.

    Converter can tell somethings off. Line protection and filter on trailer cord has green on all circuits.

  2. David

    Didn’t you mean P = IV?
    Where P is power in Watts, I is current in Amps, V is voltage in Volts?

    so,

    W = A * V, in terms of units.

    1. P=IV is how many people learn it. In college, I used E=IR for electromotive force, current, and ohms. But I’ve found the W=AV is an easier mnemonic for most people 🙂

  3. Doug

    Very good information.
    Could you advise what Progressive Dynamics converter to use. ’19 Grand Design Solitude 385GK. Purchased used. OEM converter has failed.
    LED’s on door side frame area, in both awnings, in front nose cone contours as well as a couple strips (maybe 6′ each) inside. Plus all the OEM 12v items. I believe the 12v cable used in the rv is #6. There are two very large 200A AGM Renogy batteries on board.
    Thank you!

    1. A #6 AWG wire is normally limited to 55-65 amps (read the labeling on the wire insulation to get the rating; some go up to 75 amps for short distances). That will limit the maximum size of your converter unless you want to rewire the system. LEDs don’t draw enough current to matter 🙂 Even with 400-Ah battery bank capacity, a 55-amp or 65-amp converter should work well for you unless you’re in the habit of deep-discharging your batteries 🙂 When it comes to quality, you usually get what you pay for, AYK.

  4. Cindy Corson

    I have a30 amp camper what size of converter do I need thank you

    1. Sorry, too little information to offer an informed answer! The most common size is 55 amps.

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