[Nut-upsuser] Interpreting data from 220V input APC UPS

[Greg Troxel]

My $0.02 is that the purpose of ups-nut is to regularize devices into a
common language, and APC is just being odd here.

Yes, there are 120V single-leg devices (most of them), a few 3-phase
devices (3 phases at 120\deg), and then what you have is just a
straightforward "240V UPS" (for US, vs 240V countries) with L1/L2/N/G,
just like a gas generator and just like a (modern) dryer or whatever
outlet.

So, I would say that ideally ups-nut would have a model list in a quirk
table, and represent this as L1/L2 vs N, and show

 output.L1.voltage
 output.L2.voltage
 output.voltage = sum of L1/L2 or really the L1/L2 voltage)

 output.L1.current
 output.L2.current
 output.current = probably average, so that the product with
   output.voltage is the total VA

 all the controls expressed as they can be done in the mib

 probably phases should be 1.   Nobody calls regular house wiring in the
 US 2 phase.


this is a decent chunk of work, but it's my take on how things ought to
be.  Basically nut should paper over the bugs in APC's kludge.