17th July 2026
Stand on the north coast of Scotland on a windy day and it is easy to believe we should have some of the cheapest electricity in Europe.
Around us are expanding offshore wind projects.
The Pentland Firth holds world-class tidal energy potential.
Hydro-electric schemes have powered parts of Scotland for generations.
Electricity flows south through transmission lines carrying renewable power to homes and businesses across Britain.
So why are Scottish households still paying some of the highest energy bills many of us can remember?
It is a question that has no simple answer.
Scotland produces enormous amounts of electricity
Scotland regularly generates more electricity than it consumes.
Much of that surplus comes from renewable sources, particularly wind.
As more offshore wind farms are built around Scotland's coastline, that surplus is expected to increase even further.
Yet producing electricity is only one part of the story.
Electricity does not stay where it is generated
Unlike water in a reservoir, electricity moves almost instantly through the National Grid.
Once it enters the system, it becomes part of a network supplying homes and businesses across Great Britain.
The electricity generated by a wind farm in Caithness may eventually help power homes hundreds of miles away.
Equally, electricity used in Caithness may come from generation elsewhere when local renewable output is low.
The grid operates as one connected system rather than a collection of regional networks.
Why gas still affects electricity prices
This is where many people become frustrated.
Even when renewable electricity is available at relatively low operating cost, wholesale electricity prices are often set by the cost of the last power station needed to meet demand.
Quite often that final generator is a gas-fired power station.
Economists call this "marginal pricing".
It means cheaper renewable electricity is frequently sold at a price influenced by more expensive gas generation.
Supporters say this encourages investment and ensures enough electricity is always available.
Critics argue it means consumers do not fully benefit from Scotland's low-cost renewable generation.
The cost of getting power to where it is needed
There is another factor that affects Scotland more than many other parts of Britain.
Much of Britain's renewable electricity is generated a long way from the largest centres of population.
Building and maintaining transmission lines across hundreds of miles is expensive.
Those costs form part of the overall electricity system.
As more offshore wind comes online, major investment in new transmission infrastructure is continuing.
Why are wind farms sometimes paid not to generate?
This surprises many people.
On particularly windy days there can be more electricity available than the network can carry south.
When that happens, National Grid operators may pay some wind farms to temporarily reduce output.
These are known as constraint payments.
At the same time, gas-fired power stations elsewhere in Britain may still be generating electricity closer to where demand exists.
To many people this appears contradictory.
The reason lies in the physical limits of the transmission network rather than the amount of electricity being produced.
Could zonal pricing change everything?
One proposal receiving increasing attention is known as zonal pricing.
Instead of one wholesale electricity price across Great Britain, different regions would have different prices reflecting local supply and demand.
Supporters believe areas producing large amounts of renewable electricity, such as northern Scotland, could enjoy lower prices.
Businesses using large amounts of electricity might also be encouraged to locate closer to where power is generated.
Opponents argue the system could create uncertainty for investors and produce winners and losers across different parts of the country.
The debate is far from settled.
Why don't we simply keep Scotland's electricity in Scotland?
It sounds straightforward.
In practice it is not.
Britain's electricity system has developed over decades as one integrated market.
Sharing electricity improves reliability.
If the wind drops in Scotland, power can flow from elsewhere.
If Scotland has excess renewable generation, it helps supply England and Wales.
The system spreads both costs and benefits across the whole network.
What about household bills?
An electricity bill contains far more than the cost of generating electricity.
It also includes:
maintaining the electricity network
balancing the grid
environmental programmes
supplier operating costs
VAT.
Even if wholesale electricity prices fall, these other elements remain.
That is one reason why reductions in wholesale prices do not always produce equally dramatic falls in household bills.
What does this mean for Caithness?
Few places illustrate the paradox better than Caithness.
The county contributes to Britain's energy future through engineering expertise, major transmission links and proximity to some of Europe's richest renewable energy resources.
Yet local households continue to face the same wholesale pricing system as the rest of Great Britain.
For many residents this feels unfair.
They can see the infrastructure that helps power the country, but they do not necessarily see lower bills as a result.
Looking ahead
Scotland's renewable resources are likely to become even more valuable over the next twenty years.
Offshore wind continues expanding.
Battery storage is growing rapidly.
Tidal energy is gradually moving from demonstration projects towards commercial reality.
Electric vehicles and heat pumps will increase demand for electricity.
The question is no longer whether Scotland will play a major role in Britain's energy future.
It almost certainly will.
The bigger question is whether the way electricity is bought and sold should change so that communities producing much of that clean energy receive more direct benefit.
That debate is now moving from academic reports into mainstream politics.
Whatever the outcome, one thing is clear.
The energy transition is not simply about building more wind farms.
It is also about deciding how the benefits of that electricity are shared between the communities that generate it and the millions of people who depend upon it every day.