Almot wrote:
RoyB is right. Generators are not very efficient charging devices. You can run a microwave on a generator (has to be at least 1500W then), but getting batteries to really full 100% is a royal pain. Doesn't matter whether it's 1000W or 3000W, when battery is nearing 90%, its charge acceptance rate decreases so it draws a lower current.
The generator isn't what charges the batteries, thou you probably know that your statement is misleading.
Generators are just as efficient as wall power at charging, and one shouldn't charge faster than the other (yes, minor variances based on actual voltage).
It's not difficult at all, doesn't involve any pain or really any work. Just leave a generator running for 12 hours and you are at 100%.
Getting to 100% isn't needed on most camping trips, so hookup to the house between trips and let the batteries get a long full charge again.
Almot wrote:
So it takes long hours, with same noise and fumes as if it were running full power.
This statement makes it very clear you are not familiar with the generators that this thread is about.
EU1000 full load 0.16 GPH, 0.07 GPH 1/4 load. That's not the same as full power. Less fuel means less fumes. 59DB at full load and 53DB at 1/4 load, again not the same.
EU2000 full load 0.24 GPH, 0.10 GPH 1/4 load. That's not the same as full power. Again, less fuel means less fumes. 59DB at full load and 53DB at 1/4 load, again not the same.
As the converter drops it's charge down the generator will change rpm and fuel burn to match the load, making it quieter with less exhaust flow. A generator that is powering nothing but the converter from 90-100% will be below 1/4 load.