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Brazil , where solar installations last year were less than 1 percent of those in world leader Germany, is developing policies that may boost rooftop panel sales to $3 billion within 20 years. Homeowners and businesses in Brazil may now trade electricity generated during the day by rooftop solar systems to utilities in exchange for the power they consume at night, under rules announced April 17 by the Brasilia-based power regulator Agencia Nacional de Energia Eletrica. The practice, known as net metering, is widely used in other countries and will make solar energy more practical for consumers, driving up demand, said Luis Otavio Colaferro, managing partner of the Ribeirao Preto, Brazil-based panel distributor Blue Sol Ltda. “This market will expand,” he said in an interview yesterday.
