Jeff, I have used the same or very similar UPSs at work. They come with a CD with software enabling you to connect to the UPS and set some parameters (the only thing I remember using it for was telling it how many battery banks were connected) but it may also let you set the input and/or output voltage ranges. Have you got the CD that came with it and have you tried that at all?APC UPSs are reliable and dependable, they have been around a long time and we've never had much problem with them. They do offer phone and email tech support (I am in Australia so it may be different for you) but I would approach them as well, I'd be surprised if they cannot help you or at least give you definitive answer to your problem.