About iSupply Energy

iSupply Energy are a new electricity provider who began supplying UK homes with power in August 2012. At present they do not offer a gas or dual fuel tariff to their customers, although they are planning to begin to do so soon. iSupply Energy say that they concentrate on offering their customers cheap energy prices and so, unlike many other small suppliers, they do not offer a green tariff with energy from renewable sources.

Could you save by switching to iSupply Energy? Compare energy prices now.

iSupply Energy customer satisfaction survey results

Area of performance Star rating
Which? customer score
Customer service


Value for money


Helping you save energy


iSupply Energy customer score

In September and October 2015 we surveyed 8,902 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 available Which? Switch energy customer survey results, see our best and worst energy companies page.

iSupply Energy fuel mix disclosure

All energy suppliers have to provide information about the mix of fuels that they use to generate energy and 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.

iSupply Energy fuel mix

Coal: 38.70%
Natural gas: 36.20%
Nuclear: 14.20%
Renewable*: 0.046%
Other: 0.063%
Radioactive waste calculations (grams per kWh): 0.001
Carbon (grams per kWh): 528
* Wind, hydro and solar power.

iSupply Energy fuel mix

As a new supplier iSupplyEnergy have not yet confirmed their fuel mix.

Contact Information

Customer services: 0330 2020298

Contact Which? Switch by phone

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

Compare and switch suppliers

Choose the fuel type to compare:

Gas and Electricity Electricity only Gas only
Get started

Energy Customer Satisfaction Results

Tired of poor customer service from your energy supplier? See how customers rated 25 of the UK's gas and electricity suppliers in 2016.

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.

Compare and switch supplier now