- Weak monsoon raises power demand while reducing support from hydro output
- Coal is abundant at pitheads but increasingly scarce at some power plants
India’s power market has entered September with an apparent contradiction: the country has ample coal, rapidly expanding renewable generation and substantial installed power capacity — yet electricity shortages, critically low coal stocks and exceptionally high short-term power prices are emerging simultaneously.
The explanation is not a conventional coal shortage. It is a mismatch between weather, electricity demand, generation availability and the location of coal inventories.
How has the monsoon changed the equation?
India’s monsoon was 14% below normal through 8 September, with the southern peninsula particularly deficient.
This affects electricity in two directions. Poor rainfall can keep agricultural pumping requirements elevated and temperatures higher, supporting electricity demand. At the same time, weaker rainfall reduces hydro generation — the resource that would normally provide additional energy and flexibility during the monsoon.
The consequence is straightforward: Higher demand and weaker hydro has led to greater dependence on dispatchable thermal power. This helps explain why coal-fired generation has remained unusually important despite India’s rapid renewable expansion.
If India has coal, why are power plants running short?
Because coal availability and coal deliverability are two different things.
The government estimates India has around 123.7 mnt of coal across the supply chain — equivalent to about 51 days of power-sector consumption. But roughly 100 mnt is at mines or in transit, while only around 23.7 mnt is actually at thermal power plants. This is the central issue.
A tonne of coal at a mine cannot generate electricity until it reaches the boiler. Power plants are simultaneously trying to meet high daily coal burn and rebuild inventories depleted during the monsoon. Railways therefore have to move enough coal to replace consumption and replenish stocks at the same time.
The government has already responded aggressively: power-sector coal rake loading increased from 370 rakes on 3 September to 444 on 6 September. Yet plant inventories remain under pressure.
How serious is the plant-level stress?
The number of thermal plants classified as having critical coal stocks — below 25% of normative requirement — rose from 45 at the beginning of September to 58 by 6 September.
CEA data subsequently show 61 plants classified as critical on 7 September, while total stocks across monitored thermal plants stood at only about 45% of normative requirements.
That does not imply India is about to run out of coal. It demonstrates that national inventory numbers can conceal severe plant-level and regional imbalances.
Is this affecting electricity supply?
Yes. There are now physical as well as statistical signs of stress.
Punjab provides one of the clearest examples. Coal shortages at private thermal plants, combined with technical outages at state generators, contributed to unannounced power cuts exceeding four hours across industrial centres including Ludhiana, Mandi Gobindgarh, Jalandhar and Mohali.
Rajpura had only around five days of coal, while Talwandi Sabo had around six days.
Nationally, electricity shortages exceeded 20 MU during the first week of September, compared with less than 1 MU during the corresponding period last year. The stress is therefore no longer visible only in coal-stock spreadsheets — it is beginning to affect consumers.
What is the electricity market telling us?
Perhaps the strongest signal comes from the Indian Energy Exchange (IEX). During several morning and evening periods in early September, Day-Ahead Market prices reached the INR 10,000/MWh (INR 10/kWh) ceiling. On 6 September, for example, the ceiling was reached repeatedly during evening and night blocks as sell-side availability fell sharply.
This highlights another important feature of the problem. India may have substantial generation capacity over an entire day, but dispatchable electricity becomes much scarcer once solar generation fades. Weak hydro makes that evening transition more difficult, increasing reliance on thermal generation precisely when coal inventories are stretched.
Does this make higher coal imports inevitable?
Not necessarily — but it strengthens their economic logic. India does not need a national coal shortage for imports to increase.
If domestic coal and railway capacity are increasingly prioritised towards power plants, industrial users can face tighter availability. Coastal consumers in western and southern India may also find imported coal more reliable than moving domestic coal long distances from eastern and central coalfields.
Imports can therefore rise as a response to logistics scarcity rather than geological scarcity.
What is the bigger message?
September is revealing something important about India’s changing power system.
The old question was: Can India mine enough coal?
The emerging question is more complicated: Can India deliver enough dispatchable energy, at the right place and at the right time, when weather conditions turn unfavourable?
India currently has coal. It has renewable capacity. It has generating capacity. What it appears to have less of is operational slack.
Weak rainfall has simultaneously supported electricity demand and weakened hydro generation. Coal has consequently been asked to work harder just as power-plant inventories are depleted. Coal exists elsewhere in the system, but transporting it quickly enough has become the challenge.
Power cuts, critical coal stocks and INR 10/kWh exchange prices are therefore different symptoms of the same underlying problem. India’s immediate energy risk is not necessarily scarcity of resources. It is scarcity of flexibility.
And if September’s weak monsoon persists, the country’s ability to move coal, balance renewable generation and provide dispatchable power after sunset may matter considerably more than headline figures for either coal production or installed generation capacity.
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