I would rate this unit higher if it had a built in hour meter for run time and if t was capable of powering a 220 volt appliance. I was under the impression that it had the hour meter but perhaps I thought so from looking at another comparable unit. Despite the conditions listed it is an excellent unit that is straight forward to get going in an emergency which is the primary use. Plenty of power for running an electric chainsaw and for me light enough for the label of portable.