Anybody that runs there air with a generator should have a ac volt meter.
http://www.ebay.com/itm/Camco-55263-...RV5444&vxp=mtr
Yes a lot of generators will run your air but if you don't have the right voltage you will burn the ac unit up because they will run on lower voltage but you would never know it without the meter. Easy to use just plug it in an outlet and if the needle is in the green you good to go.