Off-grid rural electrification for $25
A recent article (available here, PDF)in the journal Science tackles theproblem of electrification in low-income households with analysis showcasing arobust technical solution that could be made available for US$25 fixed-cost,without subsidy. The technology,solar-powered white light emitting diodes(WLEDs) are more efficient than fuel-based lighting (biomass, kerosene,candles, etc) by a factor of 100. Inaddition, the article’s author, Evan Mills, estimates that fuel-based lightingaccounts for annual worldwide energy consumption of 77 billion liters of fuelper year–an amount equivalent to US$38 billion per year or US$77 perhousehold. Mills states:
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