Summary: <p><a href="http://poptech.org/paul_needham">Paul Needham’s</a> organization, Simpa Networks, makes solar energy available to the poor. By using a pay-as-you-go pricing structure modeled after mobile phone cards, Simpa gives its customers ownership of the electricity. Once the initial cost of the equipment is paid off, the device belongs to the customer and their electricity is free.</p>
