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Heat Pump Performance History

This post will be updated on a monthly basis in the same vein as my Solar Generation History post.  You can find solar stats going back to 2018 here:

My Solar Generation History

My 5kW Vaillant Arotherm heat pump was installed in October 2022 and you can find all the details about it in the following post.

My 5kW Vaillant Arotherm Heat Pump

Monitoring Setup

My monitoring setup is all based around Open Energy Monitor hardware and software along with a billing grade heat meter and electric meter.

https://openenergymonitor.org/

Which I make reference to in my ‘about’ blog post listed above where you can find more details.

You can monitor every minute of every day of my heat pump performance on the following public dashboard:

https://emoncms.org/energystatsuk

And my heat pump is one of an ever growing number of heat pump installations being monitored by the Open Energy Monitor open source initiative called Heat Pump Monitor.

https://heatpumpmonitor.org/

Monthly Stats 2022

Month / Year Electric Input kWh Heat Output kWh COP Outside Low Outside Avg Outside High Avg Room
Nov-2022 344 1356 3.94 2.1 8.8 15.2 20.2
Dec-2022 647 2195 3.39 -3 4.3 12.1 20.3

Monthly Stats 2023

Month / Year Electric Input kWh Heat Output kWh COP Outside Low Outside Avg Outside High Avg Room Heating % DHW %
Jan-2023 569 2056 3.61 -3.2 4.9 11.1 20.3
Feb-2023 390 1471 3.77 -1.6 6.6 14.1 20.5
Mar-2023 393 1433 3.64 -3.9 6.3 15.5 20.0
Apr-2023 205 848 4.13 -1.4 8.4 17 19.6
May-2023 72 240 3.33 4.5 13.5 22.3 21.1
Jun-2023 40 124 3.10 6.9 17.4 29.3 22.8
Jul-2023 73 211 2.89 9.1 15.9 25.7 22.1
Aug-2023 79 247 3.13 8.5 16.3 25.7 22.4
Sep-2023 91 298 3.27 7.4 16.1 28.5 22.5 27 73
Oct-2023 183 720 3.93 1.1 11.3 21.8 20.4 57 33
Nov-2023 347 1366 3.94 -2.5 6.5 13.3 19.8 87 17
Dec-2023 414 1704 4.12 -4.7C 6 12.7 19.9 78 22
Total 2856 10718 3.75

Monthly Stats 2024

Month / Year Electric Input kWh Heat Output kWh COP Outside Low Outside Avg Outside High Avg Room Heating % DHW %
Jan-2024 503 1956 3.89 -5.3 4.3 13.1 19.6 81 19
Feb-2024 332 1409 4.24 -0.8 7.1 15.7 19.7 78 22
Mar-2024 318 1380 4.34 -1.1 7.3 14.9 19.9 76 24
Apr-2024 238 1011 4.25 0.3 9.2 18.9 20.1 69 31
May-2024
Jun-2024
Jul-2024
Aug-2024
Sep-2024
Oct-2024
Nov-2024
Dec-2024
Total 1391 5756 4.14

January Comparison

Month / Year Electric Input kWh Heat Output kWh COP Outside Low Outside Avg Outside High Avg Room Heating % DHW %
Jan-2023 569 2056 3.61 -3.2 4.9 11.1 20.3
Jan-2024 503 1956 3.89 -5.3 4.3 13.1 19.6 81 19

February Comparison

Month / Year Electric Input kWh Heat Output kWh COP Outside Low Outside Avg Outside High Avg Room Heating % DHW %
Feb-2023 390 1471 3.77 -1.6 6.6 14.1 20.5
Feb-2024 332 1409 4.24 -0.8 7.1 15.7 19.7 78 22

March Comparison

Month / Year Electric Input kWh Heat Output kWh COP Outside Low Outside Avg Outside High Avg Room Heating % DHW %
Mar-2023 393 1433 3.64 -3.9 6.3 15.5 20.0
Mar-2024 318 1380 4.34 -1.1 7.3 14.9 19.9 76 24

April Comparison

Month / Year Electric Input kWh Heat Output kWh COP Outside Low Outside Avg Outside High Avg Room Heating % DHW %
Apr-2023 205 848 4.13 -1.4 8.4 17 19.6
Apr-2024 238 1011 4.25 0.3 9.2 18.9 20.1 69 31

May Comparison

Month / Year Electric Input kWh Heat Output kWh COP Outside Low Outside Avg Outside High Avg Room
May-2023 72 240 3.33 4.5 13.5 22.3 21.1

June Comparison

Month / Year Electric Input kWh Heat Output kWh COP Outside Low Outside Avg Outside High Avg Room
Jun-2023 40 124 3.10 6.9 17.4 29.3 22.8

July Comparison

Month / Year Electric Input kWh Heat Output kWh COP Outside Low Outside Avg Outside High Avg Room
Jul-2023 73 211 2.89 9.1 15.9 25.7 22.1

August Comparison

Month / Year Electric Input kWh Heat Output kWh COP Outside Low Outside Avg Outside High Avg Room
Aug-2023 79 247 3.13 8.5 16.3 25.7 22.4

September Comparison

Month / Year Electric Input kWh Heat Output kWh COP Outside Low Outside Avg Outside High Avg Room Heating % DHW %
Sep-2023 91 298 3.27 7.4 16.1 28.5 22.5 27 73

October Comparison

Month / Year Electric Input kWh Heat Output kWh COP Outside Low Outside Avg Outside High Avg Room Heating % DHW %
Oct-2023 183 720 3.93 1.1 11.3 21.8 20.4 57 33

November Comparison

Month / Year Electric Input kWh Heat Output kWh COP Outside Low Outside Avg Outside High Avg Room Heating % DHW %
Nov-2022 344 1356 3.94 2.1 8.8 15.2 20.2
Nov-2023 347 1366 3.94 -2.5 6.5 13.3 19.8 87 17

December Comparison

Month / Year Electric Input kWh Heat Output kWh COP Outside Low Outside Avg Outside High Avg Room Heating % DHW %
Dec-2022 647 2195 3.39 -3 4.3 12.1 20.3
Dec-2023 414 1704 4.12 -4.7C 6 12.7 19.9 78 22

Open Energy Monitor versus Vaillant Monitoring

With the help of the team at Open Energy Monitor I have been able to split out my hot water data from my heating data.

The way it was worked out means that all standby electricity is bundled with the heating data, leaving hot water data to just be that.

By splitting the figures I will now be able to show monthly breakdowns of each.

This also allows me to make monthly comparisons with the heating and hot water from two Vaillant built in sources; Working Figure and the myVaillant app.

I go into detail how to obtain the working figure in the dedicated article below:

How to Measure Vaillant Arotherm COP

Open Energy Monitor (Heating and Standby) Vaillant Working Figure myVaillant App Open Energy Monitor (Hot Water) Vaillant Working Figure myVaillant App
Month / Year Electric Input kWh Heat Output kWh COP Heating COP Heating COP Electric Input kWh Heat Output kWh COP Hot Water COP Hot Water COP
Oct-2023 106 491 4.6 4.8 4.5 75 226 3.0 3.0 3.1
Nov-2023 232 1032 4.4 4.0 4.3 114 333 2.9 2.7 2.8
Dec-2023 306 1322 4.3 3.9 4.2 108 379 3.5 3.3 3.4
Jan-2024 503 1955 3.9 3.7 3.9 114 380 3.3 3.2 3.2
Feb-2024 244 1090 4.5 4.2 4.3 85 313 3.7 3.4 3.6
Mar-2024 225 1047 4.7 4.2 4.5 92 328 3.6 3.3 3.5
Apr-2024 149 694 4.7 4.3 4.5 85 307 3.6 3.4 3.5

Referral information and free credit offer

If you find the content of this website useful and are thinking of joining Octopus Energy, please consider using my referral code or ‘buy me a coffee’ to help support running costs of the website.

Using this referral code will gift you £50 of free Octopus Energy credit after signup: https://share.octopus.energy/linen-pearl-869

If you would like to ‘buy me a coffee’ to show support, please use this link: http://buymeacoffee.com/SVHgIbUYM

If you’re considering owning part of a wind farm through Ripple Energy, get £25 of free credit (if investing more than £1000) using my Ripple referral link.

Energy Stats can also be found on Twitter / X.  Please follow us @energystatsuk for daily Agile tariff pricing graphs and summaries.

We have also started posting the same graphs over on Mastodon.  You can find us here: https://mastodonapp.uk/@energystatsuk

And we are even trying to get the info out via Instagram.  Find us here: https://www.instagram.com/energystatsuk/

Note: The current and past performance of energy pricing is not necessarily a guide to the future.

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