HeatpumpMonitor: electrical consumption not showing, SCOP is 0

[gm0705 (George Mirams)]

I seem to be having a similar issue and would appreciate any help / advice having got my system up and running on Tuesday 6th Feb as I’ve tried searching around a bit and am way out of my depth!
My issues seem to be

• my system page indicates an SCOP of 0 but other data seems to be coming through ok
• my emoncms graph does not seem to be picking up my electricity consumption (e.g. no blue bars) and so it can’t show COP on the graph, but it does seem to be calculating COP
• on the heatpumpmonitor page my setup appears (Bristol Arotherm+ 5 kW) but indicates 0.0 COP and 0 days of data, even though yesterday it definitely was pulling through a COP!

Note, my heat meter was installed back when the heat pump was installed in November but my electricity metering was only installed on Tuesday, I’m not sure that has anything to do with it.

Hopefully I have explained this well enough!?

Cheers,
George

https://heatpumpmonitor.org/system/view?id=160
https://emoncms.org/app/view?name=MyHeatpump&readkey=941eb6e5d156f758c426faad295ed186

[Timbones (Tim)]

Hi George, and welcome to the forum.

You need to check the heatpump_elec_kwh feed (known to you as total_electric_Energy), as it’s returning nulls instead of values. The other feeds look fine, but that one isn’t working.

[gm0705 (George Mirams)]

Hi Tim, thanks for your quick response!
I should have said in my first message, the electricity is being pulled through when I click to view e.g. Day. The feed does seem to be set up correctly (e.g. heatpump_elec_kWh = total_electric_energy) and is set to public

[Timbones (Tim)]

Can you show a picture of the input process for this feed?

How often is this input being updated?

[Timbones (Tim)]

Looking at the data in the feed, there seems to be some missing values near midnight. Is there something happening at that time which is interfering with readings?:

1707350340000,11.973999977111816
1707350350000,11.975000381469727
1707350360000,11.97599983215332
1707350370000,11.977999687194824
1707350380000,null
1707350390000,null
1707350400000,null                           <-- midnight
1707350410000,11.982999801635742
1707350420000,11.984000205993652
1707350430000,11.984999656677246
1707350440000,11.986000061035156

The daily chart is sampling the electrical energy feed at midnight, and only sees nulls, hence the missing bars.

[gm0705 (George Mirams)]

Hi Tim, here are all the inputs,

I have inputs electric1_energy and electric2_energy which do add together to make the sum of total_electric_energy in my feed. They update pretty regularly, maybe 60s? Whatever the default is because I haven’t changed anything (knowingly)

I do also have 2 null feeds at the bottom of the list

[gm0705 (George Mirams)]

@Timbones

1707350400000

Nothing happening that I know about or have set up intentionally!

[Timbones (Tim)]

The input for electric2_energy is adding the other input and logging to total_electric_energy. Try changing the log to log_join.

This will ensure that any gaps are filled with interpolated values.

[gm0705 (George Mirams)]

Hi Tim, I think I have done what you suggested, I haven’t seen a change yet but unsure if it should be instantaneous.

Sorry this is probably quite painful for you

[Timbones (Tim)]

That looks good. Doesn’t explain the missing values, but should mean there’s no gaps from now on. Should start seeing a blue bars on My Heatpump app after midnight, and COP on HPM site.

It might be worth setting the Start date to 1707436800 in the app, so that values before midnight are ignored and don’t skew the results.

[gm0705 (George Mirams)]

@Timbones

1707436800

Thanks again Tim, have updated the start date and will keep my fingers crossed

[gm0705 (George Mirams)]

All looking good as of this morning. Thanks and thanks for your response to my other post too!