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Replacing Worcester oil boiler with an ASHP

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JulianC
(@julianc)
Prominent Member Member
1022 kWhs
Joined: 3 years ago
Posts: 304
Topic starter  

October and November update 

So my Daikin has had a good October and November (as at 16th). 
October SCOP was 3.87  Consumed 10.4kWh/day compared to predicted 13.8kWh/day

November SCOP was 4.06  Consumed 15.5kWh/day compared to predicted 31.6kWh/day

Good news. Happy ASHP owner. If you read back, I’m using weather compensation curve, with the Nest acting as a step up switch. 

Daikin Altherma 3H HT 18kW ASHP with Mixergy h/w cylinder; 4kW solar PV with Solic 200 electric diverter; Honda e and Hyundai Ioniq 5 P45 electric vehicles with Myenergi Zappi mk1 charger


   
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JulianC
(@julianc)
Prominent Member Member
1022 kWhs
Joined: 3 years ago
Posts: 304
Topic starter  

My January SCOP was 3.97 or 30.52kWh/day. 
February SCOP was 4.46 or 16.48kWh/day

This is running weather compensation. With Nest control gradually increasing temperature during the day. H/w cycle is overnight on cheaper electricity.

I’m pleased with this performance. 

Daikin Altherma 3H HT 18kW ASHP with Mixergy h/w cylinder; 4kW solar PV with Solic 200 electric diverter; Honda e and Hyundai Ioniq 5 P45 electric vehicles with Myenergi Zappi mk1 charger


   
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Toodles
(@toodles)
Noble Member Contributor
4994 kWhs
Joined: 2 years ago
Posts: 766
 

@julianc Likewise with my Daikin with Homely controller; figure of 3.8 to something over 5.5 ain’t bad as far as I am concerned! Regards, Toodles.

Toodles, 76 years young and hoping to see 100 and make some ROI on my renewable energy investment!


   
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JulianC
(@julianc)
Prominent Member Member
1022 kWhs
Joined: 3 years ago
Posts: 304
Topic starter  

We used 8,891kWh of electricity in 2023. At face value this seems a big number. But that is all our energy usage. No gas or oil. And all the electricity for our EVs. So no petrol costs. 
Octopus Go tariff. 
And it’s roughly split 2/3rds at 29p & 1/3rd at 9p/kWh. Total cost £2000. 
And we have 4kW of solar PV from 2012 which generates about 3500kWh of electricity for which we are paid about £2k. So break even. 
We always try to undertake the Octopus electricity savings opportunities. There is an 1/2hr one tonight that will pay back. 
And I’m still waiting for Vehicle to Grid charging, so I can use my EV batteries to run the house during the day and charge them up on cheaper electricity overnight. 

Keep looking for ways to reduce my CO2 footprint. As Shaw Taylor used to say “keep ‘em peeled” 

Daikin Altherma 3H HT 18kW ASHP with Mixergy h/w cylinder; 4kW solar PV with Solic 200 electric diverter; Honda e and Hyundai Ioniq 5 P45 electric vehicles with Myenergi Zappi mk1 charger


   
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