For gen techs

No, it makes no difference to the gen.

For the same total wattage, the current is half at 240V which would be slightly better IMO.

EDIT: Reading more carefully I see that there are 2 different receptacles in 120V mode. If they are in phase with each other, the RV cable neutral has to carry the total current of both of them instead of the difference between them while in 240V mode.

If they are not it phase, it’s no different than just using the 240V receptacle except the connections are more complicated.

What adapter are you using now
Imo the best option is to use a (4) wire 240v 30 amp adapter
To a (4) wire 240v 50 amp RV plug

Is the existing 240v plug (4) wire or (3) Wire

I don't think it would make a big difference in your case in terms of durability. I would suggest using the 240V setting.

The voltage switch basically controls whether the two outputs of the generator itself are wired together in series (forming a 120/240V split phase output) or in parallel (producing a single 120V output). In either case, you have a maximum of 30A that you can use from any of the hots on the twist-lock connectors. The 240V setting in my opinion makes more sense for powering a 50A RV. (In theory, it could be possible to work better with an unbalanced load where one leg is more heavily loaded than the other with proper wiring of a cordset combining the two 120V outputs from the two twist-lock connectors when running in 120V mode, but errors in making or using such a cord could be problematic or even dangerous and I think the gains would be minimal in practice.)

DrewE wrote:
I don't think it would make a big difference in your case in terms of durability. I would suggest using the 240V setting
. (In theory, it could be possible to work better with an unbalanced load where one leg is more heavily loaded than the other with proper wiring of a cordset combining the two 120V outputs from the two twist-lock connectors when running in 120V mode, but errors in making or using such a cord could be problematic or even dangerous and I think the gains would be minimal in practice.)

This is my line of thought. Currently with the 15k AC running and the gen in 240V mode on leg is running at around 75% of max load. With 0 on the other. It would seem to me, going to the 110V mode would bridge the two outputs and run at around 50% with less wear and tear on the windings in the long term.

what else is using 120v power
fridge ? water heater ? converter ?

might be better to just swap some breakers around in the power center
to balance the load
put them on the other leg

you have 23amps per leg in the 240v mode using the (4) wire 240v outlet

moving circuit breakers to shift and balance your load is the best option

you have an unbalanced load , it will still be unbalanced even on 50amp shore power

this is NOT a generator problem

MrWizard wrote:
what else is using 120v power
fridge ? water heater ? converter ?

might be better to just swap some breakers around in the power center
to balance the load
put them on the other leg

you have 23amps per leg in the 240v mode using the (4) wire 240v outlet

moving circuit breakers to shift and balance your load is the best option

you have an unbalanced load , it will still be unbalanced even on 50amp shore power

this is NOT a generator problem

Never said it was a generator problem.

you ask about rewiring plugs, using two plugs while in 120v mode
to spread the load, take load off one winding

you have inverter generator, the only windings are in the output transformer of the inverter

the 'best' way to solve the perceived issue is to balance the loads in the breaker panel

Motors and engine's longevity is measured on running hours -- and extended by good maintenance.

Keep in mind the generator is a 3 phase which is, I believe, rectified to do, then run through the inverter, so the load on the generator is the same either way, instead of load on windings, it will be load on inverter. That said, it would probably be easier on the inverter, but I've never heard of a Honda EU series inverter failure.