I have shore power 115volt. or small honda will do the job . it only pulls 4 amps so If you don't have generator and wanted to spend the money for 2000 inverter it would also do the job but I would add another bank of batteries . But I think the honda is the best way to go it has d/c voltage as well just a good saftey tool as much as a comfort tool.
Sorry I forgot to tell you where I got it . [email protected] She is a dealer in SC and has a great deal on the last of the R22 stuff. Mine is a 5000btu comes with t-stat and remote. with alittle hose and duct design your in buisness, I also Found some round 4 inch vents that you cound easly just flex into but i went alittle more and had a some ss broke . I am still not finished with this . Next I will make insulated wood box to cover system . Let me know If I can help anyway , I enjoyed this project.
I have a 200 gal tank so It really takes up most my space. I routed the tubing under the gunnle and straight in the cabin .. I really put alot of straps on it . You never even know it was there .