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How does Energy Hub work out my energy costs?

Total energy costs

The costs shown in Energy Hub include the cost of energy, any standing charges and VAT.

Once we know how much energy you're using, we can use a simple sum to work out how much this costs:

Units of energy used (in kWh) X Unit cost of energy = Cost of energy

Energy Hub then builds in your standing charges and VAT to give you a detailed picture of your energy spend.

Any figures shown in Energy Hub are provided for the purpose of understanding and managing your consumption, it is not intended as a replacement for your bill. To see your latest bill please see the 'My bills and payments' page.

Energy Breakdown costs

Our mathematical model works out your Energy Breakdown, based on your meter readings, Energy Profile and other factors, like the time of day and weather. We can then work out how much that energy costs, based on your tariff rates.

Although your breakdown isn't 100% accurate, it will give you a personalised illustration of the energy you're using around the home on things like lighting, heating and cooking.

Energy Hub will continue to evolve as the technology changes, so that we can give you the most accurate information about your energy use as possible.

Daylight Saving Time  

Smart meters don’t change for Daylight Saving Time (or BST). They stay on GMT all year round.

This is important to know if you’re on an Economy 7 tariff or a tariff with an off-peak rate, as you need to be aware of the hours when you qualify for cheaper electricity. So when the clocks go forward an hour in March, your Economy 7 or off-peak tariff hours might not match the actual time.

This also applies to Energy Hub as it displays data taken from your smart meter.