The Load That Nobody Declared
The State Electricity Minister has said, repeatedly and publicly, that there is no load shedding in Kerala this summer. People hear that and get angrier. The lights went out at midnight. The power came back at 12:20 AM. And the minister is claiming nothing happened.
He is technically telling the truth. He is also being somewhat misleading about why.
Load shedding is a specific, deliberate act: an operator somewhere turns off a feeder to conserve a finite pool of generated electricity. The 2012 Kerala cuts worked that way. KSEB scheduled them. You could predict them. And the public's instinct in 2026, when the cuts started happening again, was to assume the same mechanism was at work. If KSEB is conserving energy, why not do it at 6 AM when it is cool instead of at midnight when it is 35 degrees and unbearable?
The answer is that the cuts are not conserving anything. No central engineer is flipping a switch. The transformer at the end of your street is hitting its thermal limit and shutting itself off to avoid exploding. The grid cannot be told to do that at a more convenient hour. It fails when the physical stress is highest, which is late at night, which is exactly when it is happening.
To understand why the stress peaks at night rather than during the day, you have to understand what changed in Kerala's power consumption profile and why millions of kilowatts of it are completely invisible to KSEB.
The demand numbers
Kerala's 2026 summer consumption is beyond anything the grid was built for.
| Metric | Value |
|---|---|
| Typical daily consumption | Consistently above 110 million units (MU) |
| All-time peak daily consumption | 117.16 MU (April 18) |
| All-time peak instantaneous demand | 6,195 MW (late April 23) |
| Previous evening demand record | 6,033 MW |
| Share of power purchased from external sources | Over 70% of daily requirement |
| Daily external purchase volume | Over 80 MU sourced outside the state |
These numbers shattered every predictive model KSEB had built. Grid planning in Kerala had historically revolved around a peak demand window between 7 PM and 10 PM, driven by domestic lighting, television, and cooking. The engineering team built infrastructure around that window.
What happened instead is that a completely different, much more severe peak emerged between 10 PM and 2 AM. The driver was air conditioning. And the speed of that shift was faster than any infrastructure planning cycle can respond to.
Why the peak moved to midnight
A 1.5-ton split AC running at full capacity draws roughly 1.5 to 2 kilowatts continuously. A household that runs two units while sleeping needs 3 to 4 kW just for cooling, on top of everything else it draws. Multiply that across an apartment complex, a dense residential street, or an urban block, and the neighborhood's power demand at 11:30 PM is dramatically higher than it was at 7 PM.
The 2024 heatwave accelerated this. Kerala recorded temperatures above 40 degrees Celsius across multiple districts, which are genuinely unusual numbers for a state accustomed to milder coastal and hill-station climates. Middle-class households that had a single AC in the master bedroom started running units in every room. Households that had never owned an AC bought one. The appliance stopped being a luxury and started being a survival tool.
On top of the AC proliferation, the rapid spread of electric vehicles added a second, hard-to-predict load spike. A standard residential EV charger draws between 3.3 and 7.4 kilowatts. KSEB officials noted that charging a single EV draws roughly the same power as running a 1-ton AC, multiple fans, and all the lights in a house simultaneously, for six continuous hours.
An EV owner who plugs in after returning home at 9 PM runs a 3 to 7 kW load from roughly 9 PM through 3 AM. That load sits invisibly on top of the evening peak, and it is completely absent from KSEB's infrastructure sizing models because nobody declared it.
None of this is surprising in hindsight. But KSEB's infrastructure decisions were not made in hindsight. They were made years earlier, using demand projections that assumed consumer loads would stay roughly proportional to what consumers had formally declared.
The connected load affidavit
When you apply for an electricity connection in Kerala, or when you request a modification to an existing one, you are legally required to submit a "connected load" declaration. It is a sworn affidavit stating the aggregate rated capacity in kilowatts of all appliances and devices installed in your premises that could theoretically operate simultaneously.
KSEB uses these declarations for three critical functions.
First, to determine which tariff slab you fall into and how much your fixed monthly demand charge is. Second, to calculate how much capacity the neighborhood distribution transformer needs to safely serve your street. Third, to determine whether you need a single-phase or three-phase supply.
The single-phase versus three-phase threshold is where the system breaks down.
The 5 kW line and why nobody crosses it voluntarily
According to the Kerala Electricity Supply Code, standard domestic connections are sanctioned as single-phase (240 volts) as long as the total connected load is 5 kW or less. Once that threshold is crossed, regulations generally require a transition to a three-phase connection (415 volts).
Upgrading to three-phase is not a form you fill in online. It involves complete home rewiring to separate circuits, a new three-phase energy meter, substantially higher fixed monthly demand charges, coordination with KSEB field staff, and a nontrivial upfront cost. The practical result: the vast majority of consumers choose not to cross that line, regardless of what they are actually running.
The math of what modern households actually draw makes this a serious problem.
Two 1.5-ton split ACs at 2 kW each = 4 kW. A water heater at 2 kW. An induction cooktop at 1.5 to 2 kW. Standard lighting and fans at 0.5 kW. That is already 8 to 9 kW in actual draw, against a declared connected load of maybe 2 to 3 kW from a decade ago. An EV charger on top pushes it to 11 to 16 kW.
Nobody updates the affidavit. Updating the affidavit means crossing the 5 kW line. Crossing the line means paying more every month. The immediate, certain financial cost outweighs the abstract, shared threat of grid instability in the neighborhood.
This calculus, playing out across millions of Kerala households simultaneously, is what creates the "hidden load" problem. From KSEB's perspective, a local 100 kVA transformer is serving 40 homes based on their declared loads of 2 to 3 kW each, for a theoretical total demand of 80 to 120 kW. The transformer rating is adequate for that. But those same 40 homes are actually drawing 5 to 8 kW each during the 11 PM peak, demanding 200 to 320 kW from a transformer physically rated for 100 kVA.
The "2-phase" confusion
A number of consumers report having a "2-phase" connection, and many believe this means they already have more capacity than a standard single-phase supply. This is a persistent and consequential misunderstanding.
In proper electrical engineering, residential supply is either single-phase (one live conductor, one neutral) or three-phase (three live conductors, one neutral). The term "2-phase" has no formal meaning in the context of standard KSEB supply, and almost certainly refers to one of two things: a consumer who has somehow tapped across two live phases illegally to draw more current than their sanctioned connection permits, or simply a misidentification of a standard single-phase supply. Neither interpretation implies the connection has additional legitimate capacity.
Single-phase supply
240 V, one live conductor
Standard domestic connection for declared loads of 5 kW or less. The vast majority of Kerala households are on this. Current draw is unbalanced against the three-phase primary network.
Three-phase supply
415 V, three live conductors
Required for loads above 5 kW. Distributes current evenly across the grid's three primary phases. Dramatically reduces neutral current heating and transformer stress. Almost nobody voluntarily transitions to this.
The practical significance of the single-phase versus three-phase distinction goes beyond the individual household. When thousands of single-phase consumers draw massive, undeclared currents, those draws are not evenly distributed across the three primary phases of the distribution transformer. The load concentrates on one or two phases, creating severe phase imbalance. This generates large, wasteful neutral currents and creates localized hot spots within the transformer core that accelerate thermal degradation dramatically.
The Voluntary Disclosure Scheme
KSEB has known about this data asymmetry for a long time. The Voluntary Disclosure Scheme, which has been reopened multiple times since its introduction around 2010 and was heavily promoted again in 2023 and 2024, offers consumers an amnesty: declare your actual connected load, legalize any unauthorized appliances, and avoid the punitive charges historically levied for energy theft or unauthorized load enhancement.
The theory behind the VDS was sound. If consumers voluntarily reveal what they are actually running, KSEB's engineers can make better infrastructure sizing decisions, and transformer failures can be anticipated rather than responded to after the fact.
The practice has been chronically disappointing. Compliance remains low. The incentive structure is not aligned in KSEB's favor. A consumer who discloses a 9 kW actual load faces an immediate, permanent increase in monthly fixed charges. The benefit, which is that the neighborhood transformer might not blow up three summers from now, is shared across 40 households, is abstract, and materializes in the future rather than on next month's bill.
The rational individual choice is to stay undeclared. The aggregate of rational individual choices is a utility operating completely blind to the loads it is actually serving.
This is the failure that makes the brownouts inevitable. The grid is not undersized relative to what KSEB was told it needed to carry. It is catastrophically undersized relative to what it is actually being asked to carry, because consumers rationally chose not to tell anyone what they were actually running.
Two deficits, not one
The important distinction the minister was trying to make, imperfectly, is this one.
An energy deficit means the state lacks enough total generated and purchased electricity over the course of a day to serve all demand. The 2012 crisis was this. The remedy is scheduled load shedding: deliberately disconnecting groups of consumers in rotating shifts to ensure the available energy is rationed across the entire population. You can, in principle, choose when to do this.
A capacity deficit means the physical conductors and transformers cannot handle the instantaneous current being drawn through them, even if total energy supply is technically adequate. This is a thermal problem, not an accounting one. It happens at the level of individual neighborhood transformers and feeder lines, not at the level of the state grid. The grid does not choose when to fail under a capacity deficit. It fails when the current drawn exceeds what the equipment can safely carry, which is at night, when the ACs and EV chargers all run simultaneously.
The public instinct of "why not cut the power at 6 AM instead of midnight" is entirely reasonable if the problem is an energy deficit. It is physically impossible if the problem is a capacity deficit. No central operator is turning your street's power off. Your street's transformer is hitting its thermal limit at 11:30 PM and shutting itself off automatically. Nobody can reschedule physics.
What that automatic shutdown actually looks like electrically, how the protection relays work, why the outage consistently lasts between fifteen and thirty minutes, and what the thermal math of a failing transformer actually involves is in Part 3.
Liked this post? Share it with someone on 𝕏 Twitter or LinkedIn. If you found it useful or have a question, send me a message and I'll do my best to get back to you.
If this was worth your time, .