Re: [mh] Whole home power monitoring

Also, assuming you are in North America, you don't have two phases, you
have "Split phase" single phase service. It's a subtle difference.

On Sun, May 23, 2021 at 12:16 PM Spencer Ryan <[email protected]> wrote:

> I mean sort of but not really. You can assume 120V but in reality the
> actual voltage can vary +/- 10% in normal conditions so just assuming the
> voltage and dividing the kW reading you could be 10% or more off on amps.
> That may or may not be acceptable to you.
>
> On Sun, May 23, 2021, 12:11 PM H Plato <[email protected]> wrote:
>
>> I’m trying to understand amps, so I know I have 2 120v phases and can
>> read the kW, so I should be able to get amps right?
>>
>> On May 23, 2021, at 9:56 AM, Spencer Ryan <[email protected]> wrote:
>>
>> Since voltage is constantly changing you need to know both amperage and
>> voltage for accurate power usage measurement
>>
>> On Sun, May 23, 2021, 11:51 AM H Plato <[email protected]> wrote:
>>
>>> Thanks everyone for the suggestions!
>>>
>>> I was thinking about those clips, but I’m mostly interested in overall
>>> usage, and I don’t know if I’d need 2 power monitoring off the 100a
>>> service, one for each phase.
>>>
>>> I had RTL-SDR almost working a few years back sending data to MH through
>>> MQTT. The RTL-SDR process had a memory leak so it would make the rpi
>>> unresponsive, but I was able to read my outside electrical meter. I’m going
>>> to dust that off and maybe reboot the rpi every night to address the memory
>>> leak.
>>>
>>> https://hackaday.com/2017/12/21/read-home-power-meters-with-rtl-sdr/
>>>
>>> So stupid question — how would one convert kW to Amps. I’m on a
>>> 60hz/120v service, but since there are 2 phases coming into the house,
>>> should it be the meter kW / 240 or kW / 120?  I think it’s 240, but I’m not
>>> sure.
>>>
>>> > On May 23, 2021, at 9:32 AM, Eloy Paris <[email protected]> wrote:
>>> >
>>> > Hi Howard,
>>> >
>>> > Have you seen Marc's blog posts on this topic? The latest seems to be
>>> > this one:
>>> >
>>> >
>>> http://marc.merlins.org/perso/linuxha/post_2010-08-13_Fine-grained-house-wide-power-monitoring-with-Brultech-ECM1240_-ecmread_py-_with-net-metering-support_-and-graphing-with-cacti.html
>>> >
>>> > A decade old but I'd still take a look there as a starting point, see
>>> > what the equivalent products today are, e.g. the Brultech Greeneye,
>>> etc.
>>> > Good pointers and experiences that Marc shares there. And Cacti would
>>> > probably still be in the picture, of course.
>>> >
>>> > Cheers,
>>> >
>>> > Eloy Paris.-
>>> >
>>> > On Sun, May 23, 2021 at 08:41:28AM -0600, H Plato wrote:
>>> >
>>> >> Has anyone found any good DIY power monitoring solutions? My panel is
>>> full and I’d to get an idea of the average and peak load. I have a 100a
>>> service, and the wiring from the utility isn’t sized for 200a, so an
>>> upgrade would be pretty expensive. I’m hoping that the usage is low enough
>>> that I can just replace the panel without upgrading the service, so having
>>> usage tracking would be really helpful.
>>> >>
>>> >> ________________________________________________________
>>> >> To unsubscribe from this list, go to:
>>> https://lists.sourceforge.net/lists/listinfo/misterhouse-users
>>> >>
>>>
>>>
>>>
>>> ________________________________________________________
>>> To unsubscribe from this list, go to:
>>> https://lists.sourceforge.net/lists/listinfo/misterhouse-users
>>>
>>>
>>

________________________________________________________
To unsubscribe from this list, go to: https://lists.sourceforge.net/lists/listinfo/misterhouse-users