Non-fossil fuels- renewables, nuclear and large hydroelectric power plants-will account for more than half (56.5 per cent) of India's installed power capacity by 2027, according to a draft of the third National Electricity Plan (NEP3).

The draft notes that if India achieves its target to install 175 GW of renewable energy capacity by 2022-as committed under the 2015 Paris Agreement-it will not need to install, at least until 2027, any more coal-fired capacity than the 50 GW currently under construction.

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The Ministry of Power produces a National Electricity Plan every five years, in which it reviews the progress made over the previous five years, and sets out a detailed action plan for the next 10 with the overarching aim of achieving universal access to electricity and ensuring that power is supplied efficiently and at reasonable prices.

NEP3 outlines how the government expects the electricity sector to develop over the five years from 2017 to 2022, as well as the subsequent five years to 2027.

When the draft was released, India had installed just over 50 GW of renewable power capacity, of which wind energy made up 57.4 per cent and solar 18 per cent. This gave renewables a 15 per cent share in total installed capacity of just over 314 GW, while coal made up 60 per cent-the remaining being large hydropower, nuclear, gas and diesel.

Renewables will have to scale rapidly to meet a national target set in 2015 to increase capacity to 175 GW by 2022 -100 GW from solar, 60 GW from wind and the remainder from sundry smaller sources such as biofuels and biomass.

NEP3 projects that not only will the 2022 target be achieved, renewable power capacity will reach 275 GW in 2027. This is three times the projection made in NEP2, of 70 GW, and significantly more ambitious than publicly proclaimed targets.

Comparing NEP3 with India's Intended Nationally Determined Contribution (INDC) under the Paris Agreement reached at the 21st Conference of Parties (COP21) to the UN Framework Convention on Climate Change (UNFCCC) in 2015 shows a higher level of ambition to reach a low-carbon economy faster.

In its INDC, India had said it planned to achieve 40 per cent cumulative installed capacity from non-fossil fuel-based energy resources by 2030.

NEP3 is significantly more upbeat, predicting that non-fossil power will make up 46.8 per cent of total installed capacity by 2021-22 and 56.5 per cent by 2027-10 years from now. If the NEP3 target is met as per the projected timelines, total installed renewable capacity will surpass coal-based capacity around 2024.

Such ambitions are underpinned by the rapidly changing economics of wind and solar, whose price is falling rapidly. In February 2017, solar power was auctioned at a record low of Rs.2.97-Rs.2.979 per kilowatt-hour (kWh). Soon after, in auctions for wind power projects in March 2017, the winning bid quoted an all-time low price of Rs.3.46/kWh. Solar and wind are expected to reach grid parity-when they cost as much as conventional power — in the near future, perhaps as early as next year.

As for other zero-emission sources like nuclear and large hydropower, NEP3 projects an addition of 7.6 GW of nuclear and 27.3 GW of large hydroelectricity capacity up to 2027, up from 6.7 GW and 44.4 GW of hydro installed as of March 2016, as ongoing and approved projects come online during 2017-22.

While expecting renewable capacity to surge, NEP3 says no new coal-based capacity addition is required for the 10 years to 2027 beyond the 50 GW under different stages of construction and likely to come online between 2017 and 22.

As per NEP3 projections, the 2022-27 period would require an addition of about 44 GW of coal-based capacity to meet projected demand, a requirement that would be adequately met by the 50 GW that will come online during 2017-22. This leaves India with 6 GW of extra capacity.

The NEP's projections for coal are different from INDC, which suggested the country would require 100 GW, and perhaps as much as 300 GW, of additional coal-fired capacity by 2030.

The downgrading of coal expansion is not unexpected because rapid expansion of renewables means fossil fuel-based power plants are already under-utilised. NEP3 shows the average coal plant load factor — a measure of how much plants are used-has fallen from around 70 per cent to just over 62 per cent in the last four years, an "exceptionally low" level, according to the Economic Survey 2016-17.

While renewable capacity is rising globally, developing countries including India are widely expected to continue using cheap coal. The International Energy Agency (IEA), an intergovernmental organisation that provides key information and statistics about the oil and energy markets, has forecast that India would witness massive growth in coal-fired capacity, with 438 GW of cumulative capacity by 2040, assuming India's power system would quadruple in size to keep up with demand increasing by five per cent every year. 

NEP3 agrees with the IEA's projections about growth in India's coal capacity up to 2022, reflecting the 50 GW of capacity currently under construction, but suggests the IEA's projections for the post-2022 scenario-made just two years ago-may need to be adjusted downwards.

The current NEP concerns itself with the next 10 years only, but if the current trend of falling renewable power prices continues and India remains committed to cutting emissions, the country may well beat IEA forecasts while upholding and perhaps surpassing its INDC.