Timbones
@timbones.bsky.social
Software engineer, living and working near York, father of two.
Messes about with heat pump performance data "for fun".
Reposts are other people's opinions.
Messes about with heat pump performance data "for fun".
Reposts are other people's opinions.
August 13, 2025 at 11:46 AM
Looks to be across the markets
April 9, 2025 at 6:22 PM
Looks to be across the markets
A month later, and Cosy has continued to be cheaper than Agile, a saving of 25%:
March 17, 2025 at 12:02 AM
A month later, and Cosy has continued to be cheaper than Agile, a saving of 25%:
No cheating. Post the last photo of your pet.
March 14, 2025 at 11:41 PM
No cheating. Post the last photo of your pet.
Chart of my average monthly unit rate (p) over past 16 months; first 4 were on Cosy before switching to Agile in Feb '24. Significant saving to begin with, but prices crept up last autumn.
Meanwhile, Cosy price went down, and added 3rd cheap slot, so it's now better value for my setup.
Meanwhile, Cosy price went down, and added 3rd cheap slot, so it's now better value for my setup.
February 5, 2025 at 1:12 AM
Chart of my average monthly unit rate (p) over past 16 months; first 4 were on Cosy before switching to Agile in Feb '24. Significant saving to begin with, but prices crept up last autumn.
Meanwhile, Cosy price went down, and added 3rd cheap slot, so it's now better value for my setup.
Meanwhile, Cosy price went down, and added 3rd cheap slot, so it's now better value for my setup.
I decided to dig deeper, and compare Agile prices for January 2025 vs 2024 against Cosy and Go...
Agile used to give good prices most days. No so much this year, barely managing to stay below the day rate (so far, it seems)
Agile used to give good prices most days. No so much this year, barely managing to stay below the day rate (so far, it seems)
February 4, 2025 at 12:36 AM
I decided to dig deeper, and compare Agile prices for January 2025 vs 2024 against Cosy and Go...
Agile used to give good prices most days. No so much this year, barely managing to stay below the day rate (so far, it seems)
Agile used to give good prices most days. No so much this year, barely managing to stay below the day rate (so far, it seems)
Might not be too bad this weekend
January 30, 2025 at 6:51 PM
Might not be too bad this weekend
January 19, 2025 at 11:17 PM
I dunno. My own estimates are 37% higher (blue line) than reported by MelCloud (yellow bars), so they're missing some of the electricity - possibly the pumps (which is a configurable setting).
Need to find some systems with independent meters and compare them.
Need to find some systems with independent meters and compare them.
January 15, 2025 at 10:26 AM
I dunno. My own estimates are 37% higher (blue line) than reported by MelCloud (yellow bars), so they're missing some of the electricity - possibly the pumps (which is a configurable setting).
Need to find some systems with independent meters and compare them.
Need to find some systems with independent meters and compare them.
Agile saved me £770 this year, beating both Tracker and Cosy tariffs.
(Heatpump, cooking, battery, no EV)
(Heatpump, cooking, battery, no EV)
January 14, 2025 at 10:23 PM
Agile saved me £770 this year, beating both Tracker and Cosy tariffs.
(Heatpump, cooking, battery, no EV)
(Heatpump, cooking, battery, no EV)
Mine did exactly the same
January 8, 2025 at 9:36 PM
Mine did exactly the same
It's fine, just needed a defrost to get going...
January 8, 2025 at 9:35 PM
It's fine, just needed a defrost to get going...
@energystatsuk.bsky.social where are the Agile prices for tomorrow? Is the API down? My own queries also failed.
January 8, 2025 at 7:19 PM
@energystatsuk.bsky.social where are the Agile prices for tomorrow? Is the API down? My own queries also failed.
Did NR turn off after 24:00? Notice now power gets spikier again, and flow temp is a tiny bit higher.
January 7, 2025 at 6:00 AM
Did NR turn off after 24:00? Notice now power gets spikier again, and flow temp is a tiny bit higher.
It's quite subtle, but I reckon the start of each new cycle has a lower peak power after 00:00 - electrical draw barely above 1kW. Defrosts maybe less often, COP marginally higher, but both could be environmental.
Not detrimental at least.
Not detrimental at least.
January 7, 2025 at 12:26 AM
It's quite subtle, but I reckon the start of each new cycle has a lower peak power after 00:00 - electrical draw barely above 1kW. Defrosts maybe less often, COP marginally higher, but both could be environmental.
Not detrimental at least.
Not detrimental at least.
Your 5kW heat pump is running close to full power, so will be frosting up quickly, especially in 100% humidity. COP is above 3 still, which is decent.
January 5, 2025 at 6:14 PM
Your 5kW heat pump is running close to full power, so will be frosting up quickly, especially in 100% humidity. COP is above 3 still, which is decent.
DHW runs at lower power, so fins frost up less quickly. Enabling 'quiet mode' might reduce power during heating, and reduce frequency of defrosts, but may affect room temperature.
Over 24 hours, defrosts have 'lost' 9 kWh of heat, though most of it gets pulled back in afterwards.
Over 24 hours, defrosts have 'lost' 9 kWh of heat, though most of it gets pulled back in afterwards.
January 5, 2025 at 6:03 PM
DHW runs at lower power, so fins frost up less quickly. Enabling 'quiet mode' might reduce power during heating, and reduce frequency of defrosts, but may affect room temperature.
Over 24 hours, defrosts have 'lost' 9 kWh of heat, though most of it gets pulled back in afterwards.
Over 24 hours, defrosts have 'lost' 9 kWh of heat, though most of it gets pulled back in afterwards.
That's good going.
I managed a COP of 4 over the same period, so you're definitely winning now!
I managed a COP of 4 over the same period, so you're definitely winning now!
January 1, 2025 at 3:01 PM
That's good going.
I managed a COP of 4 over the same period, so you're definitely winning now!
I managed a COP of 4 over the same period, so you're definitely winning now!
Yeah, it's quite a roller coaster!
December 11, 2024 at 7:50 PM
Yeah, it's quite a roller coaster!
That's some good insulation; my house drops half a degree in an hour, so heatpump's been running every other hour.
December 11, 2024 at 6:32 PM
That's some good insulation; my house drops half a degree in an hour, so heatpump's been running every other hour.
Post a ship that’s not Star Wars or Star Trek
November 30, 2024 at 12:13 AM
Post a ship that’s not Star Wars or Star Trek
The rectangular chart image doesn't fit so well on bluesky - it seems to prefer square ratio @zarch1972.bsky.social
November 29, 2024 at 12:59 PM
The rectangular chart image doesn't fit so well on bluesky - it seems to prefer square ratio @zarch1972.bsky.social
Post your favorite Pokémon. Wrong answers only
November 25, 2024 at 10:46 PM
Post your favorite Pokémon. Wrong answers only
I do exactly this! Works great.
I don't use HA, but imagine someone has made a thingy to do this sort of thing, and there's external services like myenergyoptimiser.co.uk
I don't use HA, but imagine someone has made a thingy to do this sort of thing, and there's external services like myenergyoptimiser.co.uk
November 24, 2024 at 9:30 AM
I do exactly this! Works great.
I don't use HA, but imagine someone has made a thingy to do this sort of thing, and there's external services like myenergyoptimiser.co.uk
I don't use HA, but imagine someone has made a thingy to do this sort of thing, and there's external services like myenergyoptimiser.co.uk