Cosy Octopus: cheaper hours for your heat pump
Eight cheap hours a day, timed for when heat pumps do their best work.
Example: 3-bed semi-detached house, heat pump at SCOP 3.5, 60% of heating in cheap windows. Rates from Octopus Energy; exact prices depend on your postcode.
The daily pattern
| Time | Rate | Approx. price* |
|---|---|---|
| 4am – 7am | Cheap | 12.9p |
| 7am – 1pm | Day | 26.3p |
| 1pm – 4pm | Cheap | 12.9p |
| 4pm – 7pm | Peak | 39.5p |
| 7pm – 10pm | Day | 26.3p |
| 10pm – midnight | Cheap | 12.9p |
| Midnight – 4am | Day | 26.3p |
*Illustration using a day rate of 26.32p per kWh, close to the current price cap. Your regional rates will differ.
How people use it
- Pre-heat the house in the 4am and 1pm windows so it stays warm through the day rate and the evening peak.
- Heat the hot water cylinder in a cheap window.
- Ease off between 4pm and 7pm, when the rate is highest.
Good fit if
- Your home holds heat reasonably well
- Your heat pump has a scheduler or smart controls
- You have a hot water cylinder
Think twice if
- Your home loses heat quickly
- You use a lot of electricity from 4pm to 7pm
- You can’t schedule your heating
Check Cosy Prices for Your Postcode →
Switching through this referral link gives you £50 credit. Check exit fees and terms in your quote.
FAQs
What are the Cosy Octopus cheap times?
Three windows every day: 4am–7am, 1pm–4pm and 10pm–midnight. That is 8 hours in total. The peak window is 4pm–7pm.
How much cheaper is the Cosy rate?
Octopus prices the cheap windows 51% below the day rate for your region, and the peak window 50% above it. With a day rate of 26.32p that works out at about 12.9p cheap and 39.5p at peak. Check your postcode for exact rates.
Who can get Cosy Octopus?
Octopus customers with a heat pump, electric boiler or electric radiators, and a compatible smart meter.
Does the cheap rate cover the whole house?
Yes. Everything you use in the cheap windows is charged at the cheap rate, so you can run the dishwasher, washing machine or charge a battery then too.
Can I get referral credit if I switch for Cosy?
Yes. Switch to Octopus through a referral link and you receive £50 credit, whichever tariff you end up on.
Run your heat pump on cheaper electricity
Cosy Octopus has three cheap windows a day, priced 51% below its day rate. Switch through our referral link and you also get £50 credit.
Get an Octopus Quote + £50 Credit →You need a heat pump and a smart meter. Link checked 5 October 2026.