Hello...first time on board...trying to figure out which one to purchase...I would like to be able to charge my batt on my small travel trailer while rustic / dry camping...only have one batt....i have found two Honda EM 500"s that run well for $200.00 and the other for $250.00 with the 12 volt charging cord...and a Honda eu1000i that is apx 4 yrs old and also runs and looks well for $450.00 any suggestions would be GREAT...thanx