Using the map
Countries are colour-coded by the average price of one kilowatt hour (one kWh) of electricity. As you can see, this paints an interesting picture, with a lot of the countries where energy is cheapest in Northern Africa, Sub-Saharan Africa, and the former USSR, with some of the most expensive being in the Caribbean and the remote island nations of the Pacific Ocean.
Hovering over an individual country will bring up its associated data. This includes country name, its ranking out of the 230 countries measured, the average cost of one KWh, its cheapest available kWh, and its most expensive kWh.
Why some countries are missing data
Unlike our measurements of worldwide broadband speed and worldwide broadband pricing, where lack of fixed-line infrastructure meant significant gaps, energy provision is near-ubiquitous.
However, there are some countries or territories where either minimal electricity provision exists, there exists only very basic infrastructure, or the information simply isn't available. And there are countries and regions where problems with the currency do not allow for useful comparison.
It is a small list, however. This year's excluded countries are: Eritrea, Western Sahara, British Indian Ocean Territory, Tokelau, Turkmenistan, Vatican City, Venezuela, Wallis and Futuna, and Svalbard and Jan Mayen. You can find the reasons behind the exclusion of each of these countries in the second tab of the downloadable data.
Related research
Other connectivity-focused data published by Cable.co.uk and various data partners are as follows:
The Worldwide broadband speed league by Cable.co.uk in association with M-Lab, a partnership between New America's Open Technology Institute, Google Inc., Princeton University's PlanetLab, and other supporting partners.
The worldwide mobile data pricing by Cable.co.uk.
The worldwide broadband price research by Cable.co.uk.