Africa unplugged

A FEW miles down a rutted dirt road, and many more from the nearest town, a small farmhouse stands surrounded by dense green bush. On the inside of one wall gangly wires reach down to a switch and light that are connected to a solar panel. Readers in rich countries may well consider electric lighting mundane. But in northern Rwanda, where fewer than one in ten homes has access to electricity, simple solar systems that do not rely on the grid—and use a battery to store electricity for use at night—are a leap into modernity. A service once available only to rich Africans in big towns or cities is now available for just a few dollars a week. People are able to light their rooms, charge a smartphone and listen to the radio. In a few years they will probably also be watching television, powering their irrigation pumps and cooling their homes with fans.

In short, poor people in a continent in which two of every three people have no access to power may soon be able to do many of the things that their counterparts in rich countries can do, other, perhaps, than running energy-hogging appliances such as tumble dryers and dishwashers. And they will be able do so at a fraction of the cost of traditional sources of energy while also acting as a testing ground for technologies that may even make their way back from poor countries to rich ones.