Recently, the Government of India announced plans to award licenses for an additional one gigawatt of solar in the next year – about half the capacity of the Hoover Dam and enough to meet the energy needs of two million people. This move is part of India’s already ambitious targets for renewable energy that aim to address rising energy demand, decrease the country’s dependence on fossil fuel imports, and mitigate climate change.
To ensure the country meets these targets, India provides a package of renewable energy support policies that includes state-level feed-in tariffs and federal subsidies, which are in the form of a generation based incentive – a per unit subsidy; viability gap funding – a capital grant; and accelerated depreciation.
However, given the ambitious goals, but limited budget in India, the cost-effectiveness of these policies is an important factor for policymakers.
Our recent study “Solving India’s Renewable Energy Financing Challenge: Which Federal Policies can be Most Effective?” took on the question of cost-effectiveness by comparing a range of policy alternatives to the status quo.
Our findings were striking. We found that a policy that both reduces the cost of debt and extends its tenor is the most cost-effective. In fact, for wind energy, reducing debt cost to 5.9% and extending tenor by 10 years can cut the cost of total federal and state support by up to 78%. For solar energy, which is more capital-intensive, reducing debt cost to 1.2% and extending tenor by 10 years can cut the cost of support by 28%.