[Nut-upsdev] Providing Energy Information for UPS units

[dei_sesshoumaru at hotmail.com]

Hi

I can only "speak" for my APCs, and there you have an option to reset the 
energy counter on the LCD.
The naming "output.energy.cumulative" or "input.energy.cumulative" sound 
fine and meaningful to me.

The people working on the HA add-on seem to be conviced that it will work as 
soon as NUT would provide the info
==> https://github.com/hassio-addons/addon-nut/issues/227

But yes, only time would be able to tell...

Best Regards




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Message: 1
Date: Wed, 18 May 2022 15:54:47 +0200
From: <dei_sesshoumaru at hotmail.com>
To: <nut-upsdev at alioth-lists.debian.net>
Subject: [Nut-upsdev] Providing Energy Information for UPS units
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<AS4P189MB2253296E38B6E686AFDE83BE97D19 at AS4P189MB2253.EURP189.PROD.OUTLOOK.COM>

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Hi

I am using NUT tools as add-on with my Home Assistant installation to 
monitor both my UPS systems (APC SMT3000RMI2U and APC SRT5KRMXLI).
The APC units offer a information called ?total consumed energy? which which 
is available under OID  .1.3.6.1.4.1.318.1.1.1.4.3.6.0 (unit is kwhv, value 
* 100).
I would like to leverage this information to perform some basic metering, 
checking how much energy the devices behind the UPS are using.
My initial question is on Git: 
https://github.com/networkupstools/nut/issues/1428

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})

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 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.

Best Regards
Sess
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Message: 2
Date: Wed, 18 May 2022 12:14:10 -0400
From: Greg Troxel <gdt at lexort.com>
To: Sesshoumaru via Nut-upsdev <nut-upsdev at alioth-lists.debian.net>
Subject: Re: [Nut-upsdev] Providing Energy Information for UPS units
Message-ID: <rmileuyrf71.fsf at s1.lexort.com>
Content-Type: text/plain; charset="utf-8"


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 .1.3.6.1.4.1.318.1.1.1.4.3.6.0 (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.

https://developers.home-assistant.io/docs/core/entity/sensor/

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
important.

> 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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