The price of solar power in India fell at a faster-than-expected rate this year. Now, some experts suggest that by 2020, renewable energy in Asia’s third-largest economy may become up to 10% cheaper than coal power. Currently, in India, solar power prices are within 15% of coal power prices based on the average cost of solar energy. Earlier this month, the Ministry of New and Renewable Energy awarded a tender for a 500-megawatt solar park…