India’s government wants to replace 26 million groundwater pumps for irrigation with more efficient pumps that run on solar power, in an effort to relieve farmers of high costs of diesel fuel. Diesel generators are commonly used when grid power is unavailable, a not uncommon occurrence. And the power used for pumping irrigation water is also one of the largest strains on the Indian power grid. The initiative is expected to require $US 1.6 billion in…