About Spark Energy UK

UK-based Spark Energy was launched in January 2007.

Spark Energy specialises in serving rental tenants, property management firms and landlords, although has recently begun to provide tariffs which private homes can sign up to as well. It also provides smart energy meters, including in-home energy usage display units, to all its customers.

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Spark Energy customer satisfaction survey results

Area of performance Star rating
Which? customer score
Customer service & Complaints
Value for money
Bills (accuracy and clarity)


Helping you save energy

Spark Energy customer score

In September and October 2016 we surveyed 8,917 UK adults who pay for their household energy about their experience with their gas and electricity suppliers.

The percentage customer satisfaction score is based on the responses consumers gave for both overall satisfaction and their likelihood to recommend the energy supplier to a friend. Both questions are given equal weighting, and only those giving a valid response to both questions are included in the analysis. The responses are analysed and scaled to give a rating from 0-100%.

For a full round-up of the Which? Switch energy satisfaction survey results, see our customer satisfaction survey results page.

Spark Energy fuel mix disclosure

All energy suppliers have to provide information about the mix of fuels they use to generate energy supplied to gas and electricity customers, together with its environmental impact.


The fuel mix below reflects the year 1st April 2014 - 31st March 2015. These figures are officially updated published on the 1st October of each year.

Spark Energy fuel mix

Coal: 46.80%
Natural gas: 27.10%
Nuclear: 8.40%
Renewable*: 11.90%
Other: 5.80%
* Wind, hydro and solar power.

Contact Information

Customer service for customers - 0845 034 7474

Contact Which? Switch by phone

You can call us on 0800 410 1149 or 01259 220 235.

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Energy Customer Satisfaction Results

Tired of poor customer service from your energy supplier? See how customers rated 23 of the UK's gas and electricity suppliers in our latest survey.

Latest tariff updates

Tariff updates are provided by Energylinx. Energylinx is fully accredited to the Confidence Code to compare energy for domestic consumers.

About Which? Switch

Which? Switch provides consumers with a transparent and impartial way to compare energy tariffs and find the best gas and electricity provider for your needs.

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