Eight19, a technology leader in solar electricity for off-grid applications, announces IndiGo, a pay-as-you-go, personal solar electricity system for the developing world. By combining solar and mobile phone technology, the IndiGo solar electricity system is inexpensive to buy and allows users to light their homes and charge mobile phones as a service, paid for using scratchcards. An estimated 1.6 billion people, more than one-fifth of the world’s population, lack access to electricit...