“In the last one year, 30,000 million units entered our system and we sold about 3,000 million units.
"We either bank the surplus power outside or sell it to power exchanges,” said Rajesh Pande, chairman and managing director, WSEDCL.
Through the next few months, surplus power might rise to 15-20 per cent, with hydel power projects set to see more production in the monsoon.
Officials in the power department said industrial demand (which accounts for 40 per cent of the state's power consumption) didn't rise last year, contributing to surplus power.
While the demand of domestic consumers grew 19 per cent in 2012-13, demand from the industrial sector increased a mere four per cent.
In the previous two financial years, consumption by the industrial sector had registered 10-12
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