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When to use Octopus Intelligent Go tariff with my heat pump and battery

 
Air Source Heat Pumps (ASHPs)
Last Post by JamesPa 2 hours ago
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 ChrisH
(@chrish)
New Member Member
Joined: 11 hours ago
Posts: 1
Topic starter 31/10/2025 9:32 am  

I have underfloor heating with 15 room thermostats throughout the house which is heated via a heat pump along with this is I also have solar PV with a 10Kwh battery . I use the Octopus intelligent go tariff. Is it more beneficial in the winter to leave the thermostats on at a constant temperature throughout the house or to schedule them to work on the off peak times (11.30pm to 5.30am)? Many thanks.


This topic was modified 11 hours ago by ChrisH
This topic was modified 7 hours ago by Mars

   
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Octopus Intelligent Go winter heating
 JamesPa
(@jamespa)
Illustrious Member Moderator
Joined: 3 years ago
Posts: 3263
31/10/2025 7:09 pm  

Difficult to be completely prescriptive without more detail but in general heat pumps are best operated 24*7 single zone without thermostats or trvs,  or something close to that.  15 active thermostats will likely be a disaster.

May I suggest you read the ABC guide to heat pumps in articles on this forum and look towards:

Operating 24*7

Turning all thermostats to several degrees above the desired temperature so they have no effect ie they are constantly on

Balancing the loops by adjusting the flow regulators to get the desired temperature diffences between rooms

Reducing the WC curve until the house is at the right temperature.

 

From there you might tweak a bit but you need to start with a largely open system otherwise you are highly likely to be crippled by short cycling.


This post was modified 2 hours ago by JamesPa

4kW peak of solar PV since 2011; EV and a 1930s house which has been partially renovated to improve its efficiency. 7kW Vaillant heat pump.


   
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