Electric Heating | Guernsey Electricity

Want to be part of the sustainable energy transition? Sign up for job alerts 

Electric Heating

Electric heating

Electric heating is practically 100% efficient, and can even be 300% efficient when you install an air source heat pump. With over 90% of Guernsey’s electricity being imported from renewable sources, enjoy cleaner, greener heating that doesn’t cost the earth. There are many good reasons to switch to heating powered with renewables
Book your free home survey
two people lying on a sofa holding hands

There are many good reasons to switch to cleaner, greener heating that doesn't cost the earth. 

IMPORTANT: Please read this first

  • Convenience

    Say goodbye to fuel deliveries, fuel monitoring, property flues, storage tanks – and multiple energy bills. Power, light and heat your home with cleaner energy delivered straight to your door, on demand, 24/7.  

  • Cleaner air

    Have you ever noticed an all-electric house has no flue? That’s because it doesn’t produce any waste emissions as 100% of the electricity used to power the system is used to heat the home. That means cleaner air for you and your loved ones to breathe.    

  • Cost effective

    Like a car engine, a fossil-fuel boiler will cost more to run as it loses efficiency over time. Plus if you’re heating with gas, this is the most expensive way to heat a property and will be costing you around 30% more than if you were heating with electric. 

Top Tip

Fossil-fuel boilers are never 100% efficient even at new and cost more to run as they age. That means on top of cost-of-living increases, it'll also cost you more to heat the same space year-on-year. 

See how it works 

  • Compare Heating Costs

    Compare the costs of heating your property with oil, gas or electric against electric or air source heat pump

    Compare From

    Compare To

    Fuel kWh Annual cost Annual carbon emissions
    {{compFromName}} {{displayNum(fromUnits)}} £{{displayNum(fromCost)}} {{displayNum(fromEmissions)}} KgCO²e
    {{compToName}} {{displayNum(toUnits)}} £{{displayNum(toCost)}} {{displayNum(toEmissions)}} KgCO²e
    You Save £{{displayNum(saveAmount)}} {{displayNum(saveEmissions)}} KgCO²e
Discover our heating products

Your lifestyle will decide how you need to heat your home. If you have a regular routine, you can set timers for the whole house, or room by room, to ensure the heating is on when you need it.

And if you come and go, use a smartphone app to set your heating remotely and make sure your home is warm according to your schedule.

  • 90%
    over 90% of electricity comes from imported renewable hydro, wind and solar energy
  • 70%
    up to 70% less carbon emissions than oil and gas heating to benefit you and your island
  • 0%
    no greenhouse gas emissions around your property for better air quality

Which tariff is which?

Heating uses different tariffs to help you get the best from your heating system

View our tariffs

  • Storage Heating

    Super Economy 12 Tariff

  • Hot water

    Super Economy 12 Tariff

  • Electric boilers

    Superheat Tariff

  • Panel heating

    Superheat Tariff

  • Underfloor heating

    Superheat Tariff

  • Air source heat pump

    Air Source Heat Pump Tariff

Frequently Asked Questions

Making the switch to electric heating is a fantastic investment for your property. Like any property upgrade, the installation will take time to complete and we want to help answer your questions before you make the decision to change. 

Book a free home survey

Electric boilers, radiators and underfloor heating - Superheat 24 hour tariff.

This tariff was designed exclusively for electric heating and runs at a low-rate 24 hours a day. 

Electric heating appliances connected to Superheat must be wired on a separate circuit and connected to a separate distribution board.

Storage heaters - Super Economy 12 tariff.

This refers to 12 hours out of 24 when you can run your heating using low-rate electricity. This is made up of 2 hours during the day and 10 hours at night. Storage heaters work by storing heat generated using low-rate electricity overnight and releasing that heat during the day. 

Water heating and towel rails - these are usually on a Super Economy 12 tariff. 

It’s essential that you use a timer to ensure you’re only heating hot water during your low-rate Super Economy 12 times.

The best time to heat water is between 11pm and 5am as this takes advantage of both low-rate electricity and uses 100% renewable energy. At night we do not use as much electricity meaning the power station is not required to top up our imported electricity to meet customer demand.

Air source heat pumps - Heat pump tariff.

This is available for a permanently connected heat pump system and all elements of the system including pumps and controls will use this same tariff.  

Air source heat pumps using the heat pump tariff must be wired on a separate circuit and connected to a separate distribution board/consumer unit.


As there is so much demand for electric heating at this time, 'additional load' application processing can be quite a few weeks and it is very unlikely you'll get your installations at short notice.

Switching from fossil-fuel to an electric heating system is a similar time investment in your property to that of designing and building an extension and takes time to fully complete.  

The most satisfied customers have found planning two years in advance helps manage the various stages required including the additional load application, possible supply line cable upgrades and contractor lead times. 

Your installer will need to apply to Guernsey Electricity for additional load prior to installing your new heating system and this assessment may take several weeks to fully complete. 

Excluding the current waiting time for additional load application processing, a typical electric heating installation will depend on if you need a new supply line cable upgrade. 

  • If you already have sufficient capacity on the electricity supply line cable supplying your property, the switch should be fairly straightforward and may take around 21 weeks from initial enquiry to heating your home.
  • If your property needs a supply line cable upgrade, the installation may take around 29 weeks.

However each property is different and you should discuss options with your installer as early as possible to make sure you are not in a situation where you're without heating when you need it. 


If the supply line cable supplying your property has sufficient capacity, you will not need an upgrade. However to find this out, your installer will need to submit an 'additional load' application. 

If it is needed, often a supply line cable upgrade is either low cost or free of charge. 
The reason customers need to accept their heating installation quote first is to confirm with their installer that they still want to switch to electric heating based on the cost quoted, as it's common to request quotes from different installers for one job. This ensures only the chosen installer makes a single application to Guernsey Electricity for the additional electricity load required, rather than multiple applications for one job. This helps to make sure network capacity is available for other people who might need it.
If a supply line upgrade is required and it happens to involve a cost, the customer can accept or decline the supply line upgrade quote. If they do decline, then the installer cannot proceed with the installation of the electric heating and the customer is not liable for any costs.


If you’d like to make the switch to a electric heating but are unsure about the upfront cost, we can help spread the cost of your home heating affordably – just complete a short form and we’ll do the rest.  

Some customers have paid as little as £46 a month for their new electric heating system through our finance partner Cherry Godfrey Finance Limited.


If you want an economic and more controllable way of heating your home, electricity is the way forward.

I thoroughly recommend it. It is simple to operate, and I feel happier that my individual home is not pumping out fumes into our lovely environment.”

Heating customer
Free Survey & Call Back Form
Contact us to discuss your home or commercial heating options with one of our experienced energy advisers, or to arrange a FREE site survey