While fundamentally working, I'm having a few issues with the driver... The default voltage quads (for every model) are way off... Showing ~95v when it should be ~117V. I've changed the 4th/final coefficient to +5.0, but haven't tested extensively (with fluctuating voltages). The input/output voltage appears to be swapped _most of the time_. When doing a battery test, or when unplugged, the input stays steady, and the _output_ voltage reports a drop to ~15V. OTOH, when the UPS is shutdown, the ordering appears correct, as the input stays steady, and the output shows ~5V. For the above, the Powercom upsmon software appears to special-case those ~5/15V results, and on the next update, report it as 0V. I have no idea how to even special-case the screwy input/output-swapping behavior... ./powercom -a ups0 -DDD Network UPS Tools - PowerCom protocol UPS driver 0.12 (2.4.1-2308) 0.000000 debug level is '3' 0.001406 Flow control disable 0.150003 Detected: BNT-other-500AP , 120V 0.153986 Values of arguments: 0.154001 manufacturer : 'PowerCom' 0.154009 model name : 'BNT-other-500AP' 0.154015 serial number : 'Unknown' 0.154022 line voltage : '120' 0.154029 type : 'BNT-other' 0.154036 number of bytes from UPS: '16' 0.154042 method of flow control : 'no_flow_control' 0.154051 validation sequence: '{{8,0},{8,0},{8,0}}' 0.154059 shutdown arguments: '{{1,30},y}' 0.154073 frequency calculation coefficients: '{0.000208,0.000000}' 0.154084 load percentage calculation coefficients: '{1.447400,0.000000,0.859400,0.000000}' 0.154101 battery percentage calculation coefficients: '{5.000000,0.326800,-825.000000,0.465110,0.000000}' 0.154110 voltage calculation coefficients: '{0.954500,5.000000}' 0.305927 input.frequency (raw data): [raw: 80] 0.305966 input.frequency: 60.09 0.305974 output.frequency (raw data): [raw: 80] 0.305987 output.frequency: 60.09 0.305994 ups.load (raw data): [raw: 0] 0.306008 ups.load: 0.0 0.306015 battery.charge (raw data): [raw: 197] 0.306027 battery.charge: 100.0 0.306035 input.voltage (raw data): [raw: 119] 0.306048 input.voltage: 118.6 0.306055 output.voltage (raw data): [raw: 26] 0.306067 output.voltage: 29.8 0.306079 STATUS: OB TEST 0.306338 dstate_init: sock /var/state/ups/powercom-ups0 open on fd 5 0.453868 input.frequency (raw data): [raw: 80] 0.453907 input.frequency: 60.09 0.453914 output.frequency (raw data): [raw: 80] 0.453925 output.frequency: 60.09 0.453931 ups.load (raw data): [raw: 0] 0.453944 ups.load: 0.0 0.453950 battery.charge (raw data): [raw: 195] 0.453961 battery.charge: 100.0 0.453968 input.voltage (raw data): [raw: 119] 0.453979 input.voltage: 118.6 0.453986 output.voltage (raw data): [raw: 26] 0.453997 output.voltage: 29.8 0.454008 STATUS: OB TEST 1.853474 new connection on fd 6 2.457023 input.frequency (raw data): [raw: 80] 2.457070 input.frequency: 60.09 2.457077 output.frequency (raw data): [raw: 80] 2.457088 output.frequency: 60.09 2.457095 ups.load (raw data): [raw: 0] 2.457108 ups.load: 0.0 2.457115 battery.charge (raw data): [raw: 191] 2.457140 battery.charge: 95.0 2.457147 input.voltage (raw data): [raw: 119] 2.457159 input.voltage: 118.6 2.457167 output.voltage (raw data): [raw: 25] 2.457185 output.voltage: 28.9 2.457197 STATUS: OB TEST 4.456188 input.frequency (raw data): [raw: 80] 4.456240 input.frequency: 60.09 4.456248 output.frequency (raw data): [raw: 80] 4.456259 output.frequency: 60.09 4.456266 ups.load (raw data): [raw: 0] 4.456279 ups.load: 0.0 4.456286 battery.charge (raw data): [raw: 193] 4.456656 battery.charge: 100.0 4.456673 input.voltage (raw data): [raw: 119] 4.456686 input.voltage: 118.6 4.456693 output.voltage (raw data): [raw: 119] 4.456849 output.voltage: 118.6 4.456978 STATUS: OL 6.455365 input.frequency (raw data): [raw: 80] 6.455420 input.frequency: 60.09 6.455428 output.frequency (raw data): [raw: 80] 6.455439 output.frequency: 60.09 6.455445 ups.load (raw data): [raw: 0] 6.455458 ups.load: 0.0 6.455465 battery.charge (raw data): [raw: 193] 6.455476 battery.charge: 100.0 6.455483 input.voltage (raw data): [raw: 119] 6.455494 input.voltage: 118.6 6.455500 output.voltage (raw data): [raw: 119] 6.455511 output.voltage: 118.6 6.455522 STATUS: OL For anyone wondering, I wouldn't recommend these units to anyone else. A 400W dumb/"personal" UPS from APC/CyberPower/Tripp-Lite is likely just as capable, and certainly built better...