Can a Higher Amp RV Converter Be Used for Replacement

Updated 06/23/2025 | Published 12/28/2021

Question:

would like to go to a higher amperage, if safe to do soand will fit. I also use an Optima,blue top batterywould this battery make a difference? can you suggest an appropriate converter? Thanks

asked by: Steve B

Expert Reply:

I don't recommend using a higher amp converter as the converter size is based on the load of the trailer and there would be no real benefit of going with an overrated option. That said, if you want to go up 5 amps or so that shouldn't really be a problem but any higher you can run into issues. The Progressive Dynamics Mighty Mini AC/DC Panel and Converter/Smart Charger part # PD4045KA is rated for 45 amps but if you need a different size you can select this from the list below.

expert reply by: Conner L

Kelly

6/13/2025

What if you are stationary in your rv and have replaced with some residential appliances? How high can you go over the 45 amp converter that stopped working?

Kate F.

6/16/2025

@Kelly If you're parked in your RV and you've added things like a house fridge, microwave, or even a washer, that’s totally okay, especially if you're plugged into a good power source. Your old 45-amp converter was mainly there to power your RV’s 12-volt stuff (like lights, fans, water pump) and charge your battery. Most household appliances don’t even use the converter, they run on regular wall power (120 volts), just like in a house. So, if your converter stopped working and you're thinking about getting a bigger one, you can go bigger (like a 60 or 75-amp model) but only if you really need it. That might be the case if you have a bigger battery setup, upgraded to lithium batteries, or use a lot of the 12-volt stuff in your RV. If not, a 45-amp replacement is probably still fine. The most important thing is making sure your RV is plugged into a strong enough power hookup. If you're on 30-amp service, there’s a limit to how much power you can use at once. If you’re on 50-amp service, you’ve got a lot more room to work with, and running bigger appliances is no problem, as long as your wiring and breakers are ready for it. When upgrading to a bigger converter, I suggest you reach out to our friends at Progressive Dynamic, they will make sure that they get you into one that will best suit your new power needs. PD: 269-781-4241