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Air Source Heat Pumps (ASHPs)
Last Post by batalto 2 years ago
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 batalto
(@batalto)
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Joined: 4 years ago
Posts: 1091
Topic starter 01/03/2022 11:23 am  

Update for the month (Feb)

ASHP use: 909kW

Total use: 1305kW

Power purchased: 1060kW

Last Bill - Jan 20th to Feb 20th - £172 @ effective price of 10.68p/kw + standing charges

image

12kW Midea ASHP - 8.4kw solar - 29kWh batteries
262m2 house in Hampshire
Current weather compensation: 47@-2 and 31@17
My current performance can be found - HERE
Heat pump calculator spreadsheet - HERE


   
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 batalto
(@batalto)
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Posts: 1091
Topic starter 22/03/2022 12:30 pm  

latest update on electricity bills - my latest bill (Feb 20 - Mar 20) is roughly half the previous bill

image

This is for ALL power including domestic and ASHP. As you can see over half was "off peak" rates (so 00:30 - 04:30) and went to night time ASHP and battery charging

image

Example day from the 19th of March - a nice sunny day. You can see basically zero power use outside of the "off peak" hours. I expect moving forward my bills will begin to drop towards zero, with only standing charges remaining. My battery is set to stop filling in April, however I might extend this to maybe 50% fill for April, as I wind down my grid use entirely.


12kW Midea ASHP - 8.4kw solar - 29kWh batteries
262m2 house in Hampshire
Current weather compensation: 47@-2 and 31@17
My current performance can be found - HERE
Heat pump calculator spreadsheet - HERE


   
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 Kev M
(@kev-m)
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Joined: 5 years ago
Posts: 1276
22/03/2022 4:54 pm  

@batalto 

If you were like me and had no pv/batteries, how many kWh do you think you would have used and how much would it have cost you at cap rates?



   
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 batalto
(@batalto)
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Joined: 4 years ago
Posts: 1091
Topic starter 22/03/2022 5:47 pm  

@kev-m whatever you think you need - double it.

As I said on a previous post I think you can build it fairly cheaply, it depends how much you want? Do you know your use?


12kW Midea ASHP - 8.4kw solar - 29kWh batteries
262m2 house in Hampshire
Current weather compensation: 47@-2 and 31@17
My current performance can be found - HERE
Heat pump calculator spreadsheet - HERE


   
ReplyQuote
 Kev M
(@kev-m)
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Joined: 5 years ago
Posts: 1276
22/03/2022 5:52 pm  

I'm thinking about it seriously now.  I'm not sure what the numbers would look like without the tariff you have; I don't think it's available.



   
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 Derek M
(@derek-m)
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Joined: 5 years ago
Posts: 4427
22/03/2022 6:17 pm  
Posted by: @kev-m

I'm thinking about it seriously now.  I'm not sure what the numbers would look like without the tariff you have; I don't think it's available.

Hi Kev,

I think that you are correct, that the tariff that Batalto is currently enjoying will never be available again, since the Go Tariff will increase in April to approximately 7.5p/kWh during the 4 hour cheap period, and I can't remember if the expensive rate was in the 20 or 30 pence range.

I was moved to Octopus last September onto their variable tariff, and I have just looked (as a customer) to see what the Go Tariff is now, and if it was possible to change tariff. I was only offered one ridiculously expensive tariff, which certainly wasn't Go.



   
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 batalto
(@batalto)
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Joined: 4 years ago
Posts: 1091
Topic starter 22/03/2022 6:34 pm  

@kev-m ours was worth it, even without Go. Go was just another benefit for us


12kW Midea ASHP - 8.4kw solar - 29kWh batteries
262m2 house in Hampshire
Current weather compensation: 47@-2 and 31@17
My current performance can be found - HERE
Heat pump calculator spreadsheet - HERE


   
ReplyQuote
 batalto
(@batalto)
Famed Member Member
Joined: 4 years ago
Posts: 1091
Topic starter 22/03/2022 8:07 pm  

@kev-m @derek-m go is at this link. Have a go and see how you get on?

OCTOPUS.ENERGY "https://octopus.energy/go/"
Octopus Go | Off Peak EV Charging for Any Car & Charger | Octopus Energy
Octopus Go offers 5 hours of low-cost EV charging at 9p/kWh, from 12:30-4:30am. Works with any EV or charger - just plug in off-peak to save.


12kW Midea ASHP - 8.4kw solar - 29kWh batteries
262m2 house in Hampshire
Current weather compensation: 47@-2 and 31@17
My current performance can be found - HERE
Heat pump calculator spreadsheet - HERE


   
👍
2
ReplyQuote
 Kev M
(@kev-m)
Famed Member Member
Joined: 5 years ago
Posts: 1276
22/03/2022 8:35 pm  
Screenshot 2022 03 22 19.32.38

But I don;t have a smart meter ...



   
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 Derek M
(@derek-m)
Illustrious Member Member
Joined: 5 years ago
Posts: 4427
22/03/2022 8:37 pm  
Posted by: @batalto

@kev-m @derek-m go is at this link. Have a go and see how you get on?

OCTOPUS.ENERGY "https://octopus.energy/go/"
Octopus Go | Off Peak EV Charging for Any Car & Charger | Octopus Energy
Octopus Go offers 5 hours of low-cost EV charging at 9p/kWh, from 12:30-4:30am. Works with any EV or charger - just plug in off-peak to save.

Hi Batalto,

Whilst the site provides the tariff rates 7.5p and 29.82p, it would appear that it will not allow one to switch to that tariff.



   
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 batalto
(@batalto)
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Joined: 4 years ago
Posts: 1091
Topic starter 22/03/2022 8:44 pm  

@kev-m I didn't have one. I just signed up and had to wait for it to be installed. Took ages though


12kW Midea ASHP - 8.4kw solar - 29kWh batteries
262m2 house in Hampshire
Current weather compensation: 47@-2 and 31@17
My current performance can be found - HERE
Heat pump calculator spreadsheet - HERE


   
ReplyQuote
 batalto
(@batalto)
Famed Member Member
Joined: 4 years ago
Posts: 1091
Topic starter 22/04/2022 9:44 am  

Monthly bill update from me - £61 (698kw) for the last month, all heating and power purchased for everyday use. Actual use as 1185kw (roughly)

image

12kW Midea ASHP - 8.4kw solar - 29kWh batteries
262m2 house in Hampshire
Current weather compensation: 47@-2 and 31@17
My current performance can be found - HERE
Heat pump calculator spreadsheet - HERE


   
ReplyQuote



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