user avatar
Mick Wall
@Zarch1972
Husband, Dad, Wednesdayite & Energy Geek. Creator of @energystatsuk website & Twitter. £50 Octopus free credit: share.octopus.energy/linen-pearl-869
Sheffield
energy-stats.uk
Joined July 2009
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  • user avatar
    Mick Wall
    @Zarch1972
    Mar 10, 2023
    HEAT PUMPS DON'T WORK WHEN IT'S COLD!!! Well, that's what 'they' say? COP 2.8 when -0.5C outside. House a toasty 20C this morning. 1930s semi retrofit with normal radiators!! System design & sizing is KING. 👑 @energystatsuk Graph by @Openenergymon energy-stats.uk/my-5kw-vaillan…
    51K
  • user avatar
    Mick Wall
    @Zarch1972
    Oct 11, 2022
    Yes it's running, no it's not noisy. I can hear the road at front of the house over the sound of the heat pump. Yes, you know it's working when you're stood next to it cos you get an icy blast from the front. It's passed the wife test who said it sounded fine. 😃 @energystatsuk
    00:00
  • user avatar
    Mick Wall
    @Zarch1972
    Aug 30, 2022
    What Size Heat Pump (and more besides). I've been tinkering with this article for too long now. After lots of internal feedback, time to put it out there for a bit more critique. All comments welcome. Warning, it's a whopping read, grab a brew!! 😆
    What Size Heat Pump? | Energy Stats UK 2026
    From energy-stats.uk
  • user avatar
    Mick Wall
    @Zarch1972
    Dec 30, 2023
    It has taken me a while to finish these @_heatgeek courses (real job getting in the way), but I've finally completed both the Awakening and Mastery exams. “Congratulations, You are now one of the UK’s top heating engineers” it tells me. Correction, one of the UK’s top homeowner
    17K
  • user avatar
    Mick Wall
    @Zarch1972
    Aug 3, 2020
    We own an EV!! Covid meant a 3 month delivery delay, but she's arrived today and looks tremendous. We can finally divert solar with our @myenergiuk Zappi and take advantage of future @octopus_energy price plunges. @energystatsuk @JordeeBrompton @DeanFieldingF1 @agile_phil @g__j
  • user avatar
    Mick Wall
    @Zarch1972
    Dec 2, 2023
    Pretty pretty cold last night and still -4C now at 9am. Despite all the FUD and BS about heat pumps not liking the British climate, we seem to nice and warm. We must be doing something wrong? 🤷‍♂️ COP of 2.92 across the past 24 hours (range -5C to +1C). Those ill fated Energy
    19K
  • user avatar
    Mick Wall
    @Zarch1972
    Dec 5, 2022
    Bloody love this. 😍 Heat pump came out of overnight setback, Trickled ~2.6kW of heat into the house for 18 hours straight before dropping back to overnight setback. Outside 5C, inside 20.5C. COP of 4.34 for the whole period. Monitoring by @Openenergymon @energystatsuk
  • user avatar
    Mick Wall
    @Zarch1972
    Sep 27, 2023
    Oh my word, this has properly hurt my head at times, but I'm delighted to have worked through and completed this @_heatgeek Awakening Course. My knowledge has gone through the roof on the following modules. Watt is Energy Heat Loss Calcs Mass Flow Rate Velocity Pipe Sizing
    12K
  • user avatar
    Mick Wall
    @Zarch1972
    Sep 1, 2022
    Since installation in February, I've diverted 928kWh of solar into my @MixergyLtd water cylinder via @myenergiuk Eddi. With electric around 40p/unit now, that's almost £400 of juice into the cylinder. The Eddi has nearly paid for itself in a single summer! 👍 @energystatsuk
  • user avatar
    Mick Wall
    @Zarch1972
    Oct 24, 2018
    Latest @Raspberry_Pi mini-project; a Energy / Solar display monitor. Its a Pi Zero W in a self built @LEGO_Group case, with the GFX Hat display from @pimoroni. I wrote some Python code to pull the data from my @Openenergymon EmonPi, switching between red/green when required. 👍
  • user avatar
    Mick Wall
    @Zarch1972
    May 22, 2022
    Thrilled to trial @OctopusEnergy new hardware. The Home Mini connects to your smart meter & home Wi-Fi to report realtime consumption & tariff pricing data back to the Octopus app. It's like a Smart Meter, but with super Octo powers. 🐙 @energystatsuk Thanks @g__j @agile_phil
  • user avatar
    Mick Wall
    @Zarch1972
    Sep 5, 2023
    Wonderful autumnal solar PV day yesterday. 23kWh generated, 0kWh imported. Battery (from previous day) covers ASHP hot water run overnight. We get through breakfast on battery, solar fills batteries through the day, ASHP water run in the afternoon. Then we sail through the
    10K
  • user avatar
    Mick Wall
    @Zarch1972
    Nov 2, 2023
    ONE YEAR OF HEAT PUMP DATA Yesterday marked the one year anniversary of logging my heat pump data to @Openenergymon Electric in: 3074 kWh Heat Output: 11074 kWh SCOP: 3.60 (for both heating and hot water) All logged via: emoncms.org/energystatsuk Vaillant Working Figures:
    7.8K
  • user avatar
    Mick Wall
    @Zarch1972
    Mar 9, 2023
    Solar generation peaked at 61 Watts today. 🤣🤷🏼‍♂️🌞⚡️
    11K