I love my Onan. Actually, I love my Onans - I bought one for my home -$100 plus some TLC. My RV Onan is now 40 years old and runs as well now as the day it was purchased. I doubt many portable gens will still be running 40 years after they were purchased. An Onan is simple, reliable, rugged, easily fixed and runs great on ethanol 10% fuel. It produces great sine wave power that your charger will love.
That's the good.
On the bad side: It's heavy, uses more fuel and makes more noise than the portable inverter gens. The amount of extra fuel use is minor when compared to the cost of camping, and I'll carry the weight to avoid the inconvenience of portable gens. The only complaint I really have is the noise is more than I want to inflict on others for long. I deal with that by using a large battery bank and inverter, a really fast charging system and running the gen only in the middle of the day for just long enough to charge the batteries.
