On 7 January 2013 11:45, Trent W. Buck <trentbuck@gmail.com> wrote:
  - ask the vendor (but don't necessarily believe them).

It seems like the company has changed hands numerous times, so I doubt this is an option.
 
  - google the name plus "nut" or so.

The only result I got was somebody on whirlpool looking for Windows software (without success)
 
  - if it supports e.g. both USB and RS232, try both.

No, only serial.
 
  - just run each nut driver by hand and see if it complains, e.g.
    "/lib/nut/megatec_usb -a foo -D"

Yes, tried that for every driver, didn't get anywhere.
 
Once you know what nut driver to use, it should be straightforward.

Yes, exactly ...

Suspect I probably should just replace it with a newer UPS. For all I know the serial port is broken on this one. What brands are good?

--
Brian May <brian@microcomaustralia.com.au>