Which is better for RV use?

The FIRMAN, mainly for its TT-30-ready 3200 W on gas and propane option for campgrounds that ban gasoline cans. The Champion's lighter weight helps if you load it by hand.

The FIRMAN at 58 dBA at quarter load versus 64 dBA for the Champion. That gap matters at a campsite at night.

Is the FIRMAN worth more than the Champion?

It adds propane, electric start, a 3-year warranty and lower noise. Pay extra only if you need those; the Champion wins on weight and runtime.

Which runs longer on a tank?

The Champion, up to 10 hours at 25% load on 1.54 gallons. The FIRMAN runs about 9 hours at the same load on 1.8 gallons.

Can either run a 30A RV air conditioner?

Both peak at 4000 W, which can start many 13,500 BTU RV air conditioners, but neither has a 30A twist-lock outlet listed for the Champion beyond TT-30R. Check your AC's surge draw.

Do both shut off on carbon monoxide?

Yes. The Champion uses CO Shield auto shutoff and the FIRMAN uses CO Alert. Both are safety cutoffs, not substitutes for running the unit outdoors.

4000W Electric Start Dual Fuel Inverter with CO Shield vs FIRMAN Power Equipment Dual Fuel Inverter Portable Generator 4000/3200W Electric Start with CO ALERT

Buy the FIRMAN WH03242 if you want dual-fuel flexibility, electric start, quieter running and a 3-year warranty. Buy the Champion 4000W if you want the lightest option and don't need propane. No prices were given for either unit, so compare live store prices before deciding.

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