From millions of rooftops to one virtual power plant

It is a bright summer afternoon in Pakistan. The sun is high, the rooftop solar panels are producing at full strength, and a family goes about its daily routine: the refrigerator running, the washing machine just finished, the air conditioner keeping the house comfortable. The panels are quietly producing more electricity than the household needs at that moment.

For the family, this is simply another day with solar. They installed the system to cut their bill, gain some independence from the grid, and make use of the sunlight above their home. They do not think of themselves as a power producer, just a consumer who happens to have panels on the roof.

Now imagine that this household is one of a million such households.

Individually, each rooftop system is small (five kilowatts on one house, ten on another, twenty on a larger commercial building) and none would attract a national system operator’s attention. But multiplied across hundreds of thousands of consumers, the numbers become enormous: a collection of small household decisions can collectively represent thousands of megawatts of generation.

For the person in the electricity control room, the afternoon is becoming complicated. Solar generation is high, conventional generators may need to cut output, and power flows across the network are shifting. As evening approaches, the situation reverses: solar falls rapidly just as demand rises. The system will need flexibility. The operator knows a huge amount of generation exists behind consumers’ meters, but knowing it exists isn’t the same as being able to use it.

The traditional system was built around a small number of large power plants: visible, measurable, connected to the grid’s control architecture. Distributed solar turns this upside down: potentially millions of small generators are scattered across homes, businesses, and industries, and their output shifts with sunlight and behaviour.

The problem is therefore not that a consumer has installed solar. The problem is that the power system sees millions of individual resources where it needs to see a coordinated resource.

Yet hidden inside this challenge is an opportunity. Digitally connected and intelligently coordinated, these resources can begin to behave as a single system resource: solar panels stay on rooftops, batteries stay in homes, electric vehicles stay with their owners. What changes is the digital layer connecting them.

This is the basic philosophy behind a virtual power plant: instead of one enormous power station, thousands of small resources are aggregated through a digital platform that monitors their availability, forecasts output and, within agreed parameters, coordinates their operation. To the system, a multitude of small resources begins to look like one sizeable, flexible one.

But there is a fundamental human question that technology alone cannot answer. Why would consumers agree to participate?

A household that has invested its own money in solar and battery storage may be reluctant to let another party influence how it operates, worried about losing backup power, shortening equipment life, or losing control of an asset they paid for.

The answer cannot simply be that participation is good for the grid; consumers have their own economic interests and need a compelling value proposition. One option: an upfront connection incentive, a fixed payment for connecting an eligible system to an approved platform and making it available for grid services.

But the real opportunity lies in revenue stacking, where the same resource earns value from several services at once. Depending on the regulatory framework, a connected battery could shift solar energy from midday into the evening, reduce peak purchase, respond to demand signals, provide frequency support, and help manage network congestion. Rather than one payment, the consumer earns from several: the battery becomes an asset that generates income, not just cuts a bill.

Solar creates a parallel challenge: on a sunny afternoon, large amounts of distributed generation can create reverse power flows, voltage problems and periods of excess supply. Combined intelligently with batteries, electric vehicles and flexible loads, much of that surplus can be absorbed rather than pushed into the network.

This is where the aggregator becomes important, sitting between consumers and the electricity system, bringing thousands of small resources together into a service a distribution company or system operator can use, without communicating with every household individually.

But this model works only if trust is designed into it from the start. Consumers must know what they are agreeing to (when assets can be called, how much capacity can be used, what minimum reserve stays protected, and how compensation is calculated) and should retain meaningful control, including an override where appropriate. The principle is simple: the grid receives flexibility, the consumer retains agency.

This is where regulation and commercial design become critical: rules for aggregators, technical standards, performance measurement, cyber security, data protection and consumer protection, and above all, a fair share of the value created. An effective model layers the upfront incentive with an availability payment for staying connected, a performance payment for responding when called, and ongoing revenue from energy and ancillary services.

For Pakistan, this shift in thinking is particularly important. Consumers are already investing in distributed solar because it makes economic sense for them.

The scale involved is no longer a rounding error: cumulative solar panel imports into Pakistan are estimated to have crossed 50 gigawatts of installed capacity. Even if only half of that is ever meaningfully connected and made available to the grid, that is 25 gigawatts of virtual generation capacity: a fleet, sitting behind consumer meters, comparable in size to the country’s entire conventional generation base. Add batteries at scale, and the story changes again: a coordinated fleet, even a modest share of what that 25-gigawatt base could support, represents a multi-gigawatt-hour store of dispatchable energy, enough to reshape how the evening peak is met, not merely trim it.

The question is no longer simply whether distributed generation will grow. It is how intelligently it can be integrated into the electricity system.

Smart meters can provide visibility. Smart inverters can provide grid support. Batteries can provide flexibility. Electric vehicles can become flexible loads and potentially mobile storage resources. Digital platforms can connect them. Aggregators can coordinate them.

For decades, the electricity industry asked where to build the next power plant. The distributed energy era asks a different question: how much power and flexibility already exists behind the meter?

There may be no single turbine hall, cooling tower or transmission line; instead, millions of rooftops, batteries, vehicles and flexible loads, each owned by an everyday consumer.

What began as a family’s decision to put solar on its roof can become part of a much larger system: the consumer gets lower bills and new income, the aggregator gets a new business opportunity, the network gets greater visibility and flexibility, and the system operator gets another tool to balance the grid.

One rooftop may be small. One battery may be small. One electric vehicle may be small. But when a million consumers participate; the question is no longer how small each resource is. The question is how powerful they can become together. The power plant of the future may not always have a physical location. Sometimes it may be sitting quietly on your rooftop behind your electricity meter. You just need to connect it.

Copyright Business Recorder, 2026