Octopus Energy, one of the UK’s largest energy suppliers, has launched the Cosy Heat Pump Fleet Performance Dashboard, a tool providing real-time efficiency and cost data from its installed Cosy heat pumps across thousands of UK homes.
The dashboard collects anonymised data on energy use and heat output, showing a coefficient of performance (COP) of 4.11 over the past month, meaning each kilowatt-hour of electricity produced over four kilowatt-hours of heat.
By comparison, gas boilers typically have a COP of around 0.85.
Monitoring efficiency and cost
Cosy heat pumps include multiple sensors for temperature and humidity, with optional remote servicing and wireless software updates to maintain performance.
Regional data is available, and the fleet’s annual average Seasonal Performance Factor (SPF) is reported at 3.68.
Octopus notes that 80% of Cosy units cost less to run than a conventional gas boiler, with customers saving an average of £219 per year on its heat pump tariff.
Greg Jackson, CEO of Octopus Energy, says, “We’re launching this revolutionary data dashboard to prove, in perpetuity, that heat pumps cost less to run than a gas boiler.
“This isn’t a projection or a lab test; it’s daily data from thousands of homes.”
A survey of Octopus customers found 85% reported running costs at or below their previous gas boiler, with 89% expressing total satisfaction during the January 2026 cold snap.
For more from Octopus Energy, click here.