[Nut-upsdev] Providing Energy Information for UPS units

Greg Troxel gdt at lexort.com
Wed May 18 17:14:10 BST 2022

Sesshoumaru via Nut-upsdev <nut-upsdev at alioth-lists.debian.net> writes:

> The APC units offer a information called “total consumed energy” which
> which is available under OID . (unit is
> kwhv, value * 100).
> As suggested by jimklimov I checked docs/nut-names.txt but found nothing for the above OID or for energy in general.
> Hence I would like to propose to add the following information to NUT for extraction:
> ==> | output.energy.totalused | Nominal value of totally used energy (kwh) (for APC e.g. 49050 {=490.50kwh})

I would be inclined to see what names are used by homeassistant. and
align with them.  HA has an idea in sensors of accumulating values and
time since reset.


I think the tricky part is that sometime, when the UPS is power cycled
perhaps, that energy value is goint to reset.

I would tend to call it "output.energy.cumulative" to emphasize that it
intends to increesa except for when it is reset, but that isn't

> Question would be if other devices also have such information or if there is general concept name for this.
> Maybe it makes sense to have a own category energy if there is more
> information provided. I can only check my APC systems, but maybe
> others can check theirs or already know that there is a general
> concept or more information.

I don't know what you mean by "own category energy".   I see energy as a
property of input, and I can see a UPS that meters input current and
input power and thus computers input energy also.   So I don't think we
should move "output energy" to "energy".   It is about output, just as
much as volts/amps/va/power is.

> I would hope that once NUT provides this valuable information, also
> the HA integration will fetch it and provide a sensor which then can
> be used for all kinds of automations, graphs and statistics. Not that
> an UPS is a power metering devcie, but I would love to leverage this
> information.

I don't know if the HA integration will, but once nUT has it, it should
be easy (famous last words).
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