For years households locally and across the UK have been told that increasing our reliance on renewable energy would eventually lead to lower electricity bills. Yet for many households and businesses, the reality has been the opposite. Bills have remained stubbornly high, with repeated price rises leaving many wondering when, if ever, the promised savings will arrive.
This question is perhaps asked most often in communities like ours. Across the Highlands, people live alongside some of the UK’s largest renewable energy developments. Wind farms, substations and new transmission infrastructure have become an increasingly familiar part of the landscape, yet many local residents feel they are paying more, not less, for the electricity that surrounds them.
Many will also remember the 2024 General Election campaign, when Labour stated that its plans would cut household energy bills by up to £300. Two years on, many people are asking a simple question, “Has your bill fallen?”
The answer for most households is self evident.
Energy analyst Kathryn Porter of Watt Logic has been examining these issues in detail, looking beyond political slogans to how electricity systems actually work. Her central message is refreshingly straightforward. Electricity grids are governed by engineering and physics, not political ambition. No matter how attractive a policy may sound, the system must still provide electricity every second of every day, in all weather conditions.
One of the key points she raises is that comparing the cost of generating electricity is only part of the picture. Consumers are not buying electricity only when the wind blows or the sun shines. They are paying for a complete electricity system that must remain stable and reliable every hour of the year. That means paying not only for generation, but also for backup power stations, storage, balancing services, new transmission lines, substations, voltage control and other engineering systems needed to keep the grid operating safely.
As more intermittent generation is connected, those supporting costs increase.
Britain is already seeing the effects. At times, Scotland can produce more wind power than the existing network can carry south. When that happens, wind farms may be paid to reduce their output while gas-fired stations elsewhere are paid to increase theirs. The result is that consumers ultimately fund both decisions through their electricity bills. Constraint payments and balancing costs have become an increasingly significant part of running the electricity system.
Another important point is that modern renewable technologies cannot simply replace traditional power stations on a one-for-one basis. Conventional generating stations naturally provide services that help keep the grid stable, such as maintaining voltage, frequency and system strength. When those stations close, additional equipment has to be installed to perform many of those same functions. In other words, replacing generation often means paying again to replace the engineering services that used to come with it.
Storage is often presented as the obvious solution, but the picture is more complicated. Batteries are highly effective at smoothing short-term fluctuations and responding within seconds when needed. However, they are generally designed to provide electricity for a few hours rather than several consecutive days of low wind during winter, when demand can remain high. Longer-duration storage remains technically challenging and expensive.
Kathryn also argues that much of the public debate focuses on the carbon emissions at the point electricity is generated, while giving less attention to the wider environmental footprint. Manufacturing wind turbines, solar panels, batteries, cables and substations requires large quantities of steel, concrete, copper and other minerals, all of which have to be mined, processed, transported and eventually recycled or disposed of. Looking only at operational emissions tells only part of the story.
Perhaps her most thought provoking observation is that today’s electricity system is becoming increasingly layered rather than simply replacing one technology with another. Instead of retiring one complete system and building a cheaper successor, Britain is often maintaining existing dispatchable generation while simultaneously constructing large amounts of renewable generation, expanding the transmission network and investing in new technologies to support grid stability. That inevitably adds complexity and cost.
Whatever your views on climate policy or renewable energy, affordable electricity matters to every household, every business and every community.
The debate is no longer purely about how electricity is generated. It is increasingly about whether the entire system can deliver what consumers actually need, reliable power at a price people can afford.
