Check the NUT Hardware Compatibility List to figure out which driver will work for your UPS. For my USB UPS, the correct driver is usbhid-ups. Update ups.
usbhid-ups brings USB/HID UPS monitoring to NUT on all platforms supporting USB through libusb. It should detect any UPS that uses the HID Power Device Class.
For a list of user-reported dumps of NUT-supported devices, go visit the Devices Dumps Library. Support level legend. 1: protocol based on reverse engineering ...