Electricity Cost per kWh: Should You Go Solar?


Energy providers charge households for their electricity usage in units known as kilowatt hours (kWh).

The cost of electricity per kWh is typically between 11p and 16p. If you’re paying more than this, you’re probably getting a bad deal.

Because electricity prices are continuing to rise, many homeowners are installing solar panels to avoid expensive energy bills.

What is kWh?

The kilowatt hour (or kWh) is the most important bit of information on your bill from your energy provider. It lets you know how much electricity you’re using to power your home – and exactly how much you’re paying for it. But how is a kWh calculated?

You should think of a kWh as how much electricity is used over a period of time to power an electrical device. To find out how many kWhs you’ve spent running an appliance, you simply have to multiply its wattage by the number of hours you have used it for, and then divide this number by 1,000.

So, for example, if you have a 100 watt light bulb in your lounge and you turn it on for 10 hours, you’ll spend 1 kWh of electricity lighting that room. Here is how we worked this out:

(100 watts x 10 hours = 1,000) ÷ 1,000 = 1kWh

What does 1 kWh Equate to in Your Home?

Using a desktop computer for 3 hours

Ironing your clothes for 1 hour

Boiling your kettle 10 times

Watching TV for 10 hours

Having your fridge switched on for 24 hours

Playing on a games console for 3 hours

How Many kWhs Does Your Household Use?

Domestic households are divided into low, medium and high energy consumers depending on how many kWhs of electricity that they use per year.

Energy Consumer
Annual Electricity Usage
Example Household
2,000 kWhs
1 or 2 people in a small house or flat who work full-time and are only at home in the evenings and weekends.
3,100 kWhs
A family of 4 in a 3-bedroom house who are only at home in the evenings and weekends (e.g. the parents work full-time and the children are at school).
4,600 kWhs
5 students in a large 5-bedroom house who are at home during most of the day, evenings and weekends.

Electricity Prices per kWh

When calculating your bills, your energy provider will monitor how many kWhs of electricity you’re using and will multiply this figure by the price per kWh – or unit rate – agreed in your electricity tariff. This is typically between 11p and 16p per kWh of electricity.

The average cost of electricity per kWh for UK households is 14.37p*

*According to the Energy Saving Trust.

The tables below show you the current price per kWh of electricity charged by leading energy suppliers in the UK. These figures should only be used as guidance – the actual price you will be charged will depend on factors such as your household energy usage, where in the UK you live, and what electricity tariff you’re on.

The Big Six Energy Providers

Chances are you’ve probably heard of the ‘Big Six’ energy providers – they’ve dominated the energy market in the UK for years and provide electricity to over 45 million homeowners.

The table below shows you how much the Big Six charge per kWh of electricity. These prices are based on a quote for a medium energy consumer.

Electricity Provider
Price per kWh
British Gas
EDF Energy
Scottish Power

*Prices based on a 3-bedroom detached house in London with 2 adult occupants.

Smaller Energy Providers

In recent years there has been a huge growth in the number of smaller, independent providers hitting the UK energy market. But don’t think that just because they’re smaller they can’t offer better prices than the Big Six. In fact, the majority will offer you a cheaper unit rate, with some charging you up to 5p less per kWh of electricity.

The table below provides you with a rundown of the price per kWh of electricity quoted by smaller energy providers for a medium energy consumer.

Electricity Provider
Price per kWh
Bristol Energy
Coop Energy
Extra Energy
Flow Energy
First Utility
Green Network Energy
Green Star Energy
Octopus Energy
OVO Energy
PFP Energy
Sainsbury’s Energy
Toto Energy

*Prices based on a 3-bedroom detached house in London with 2 adult occupants.

So How Much Does It Cost to Run Your Household Appliances?

It’s pretty easy to work out how much it costs to run any of your household appliances. All you have to do is multiply a device’s kWh (using the formula from earlier) by your energy provider’s unit rate per kWh.

So, if you have a 500 watt DVD player which you use to watch a 1.5 hour film – maybe Zoolander or The Lion King – and pay 14.37p per kWh of electricity, then it would cost:

(500 watts x 1.5 hours) ÷ 1,000 x 14.37p = 10.78p to use your DVD player

What About the Price per kWh of Electricity in the Future?

The cost of electricity in the UK has been rising for many years, with some energy companies increasing their prices by as much as 10% year-on-year. Unfortunately for homeowners, it seems that this trend is set to continue into the future, with households facing ever-rising energy bills.

But why is this? A recent report by the energy regulator Ofgem blamed the rising costs that energy companies are facing. An increase in the wholesale price of electricity together with the government raising the tax on environmental and social policy legislation means that energy providers are having to increase their prices in order to compensate for their additional outgoings. As a result, households are being left increasingly out of pocket. But there is a way that you can avoid these rising electricity costs – by investing in renewable technology (find out more below).

Solar Electricity

Have you considered installing solar panels on your home? Looking at the current cost of electricity – together with the inevitability of further price increases in the future – it’s no wonder that so many people in the UK are investing in solar panels in order to generate their own electricity and ultimately avoid rising energy bills.

84% of homeowners we surveyed save up to 50% on their energy bills with solar panels*

*Based on a survey we conducted in January 2018 of 390 UK homeowners with solar panels.

But how much electricity do solar panels actually produce? Certainly enough to cover a large proportion of your household’s energy usage. Just take a look at the table below which compares the annual electricity output of solar panels to the annual electricity usage of different households.

Number of Solar Panels
Typical Electricity Output
Suitable For
Typical Electricity Usage
850 kWh
1 adult
1,500 kWh
1,700 kWh
2 adults
2,000 kWh
2,550 kWh
Family of 4
3,100 kWh
3,400 kWh
Family of 5+
4,500 kWh

Solar panels don’t just allow you to save money on your electricity bills; you can also earn up to £236 every year from the Feed-In Tariff (FiT). This Government-funded scheme essentially rewards you for generating energy from renewable technology. You’ll be paid not only for every kWh of electricity that you produce (and use), but also for every kWh of electricity that you don’t use and give back to the National Grid. You’ll receive these payments for 20 years, meaning you’ll earn a healthy Return on Investment (ROI). Depending on how many solar panels you install, you can make a profit of between £350 and £1,300.

Other benefits of solar panels include:

The upfront cost has plummeted in recent years, meaning you can now get solar panels from just £1,500.

They’re low maintenance and reliable, only needing a quick clean every now and then to keep them running efficiently.

They don’t just work in the sun – in fact, they still produce electricity in cloudy weather or even rain; great for Brits who spend half the year in endless rainfall.

They produce electricity from a renewable energy source (the sun, obviously) meaning you can reduce your household’s carbon footprint.

Solar batteries can be connected to your solar panels and allow you to store excess electricity so you can use it overnight (or in less favourable weather conditions) rather than sell it back to the National Grid. Having a solar battery further decreases your reliance on your energy provider supplying electricity to your home.

To find out more about the price of solar panels and how you can earn money from the FiT, visit our guide to solar panel costs.

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Alex Vasili

A Dalston dweller with a green outlook on life, Alex is determined to help everyone save money on their energy bills. With the best collection of ethical hats and trainers in N1, Alex is well placed to give anyone a run for their money.