Linking Electricity Bills to Location Unlikely to Lower Prices, Net Zero at Risk
Zonal Pricing: A Risky Bet for Britain’s Electricity Future?
Table of Contents
A proposed electricity pricing reform in Britain could lead to households paying different rates based on their location.
Currently, the British electricity system functions as a unified market across England, Wales, and Scotland. Approximately 30% of electricity is traded through half-hourly auctions, known as the spot market. The remaining 70% is traded in forward markets via contracts that cover demand weeks,months,or even years in advance.
The spot market largely determines the price of electricity, as forward market contracts are hedged based on current and expected future spot market prices.
Zonal pricing would divide the British market into multiple zones, each with its own spot and forward markets.This effectively splits one large market into smaller, interconnected ones.
The UK’s Department for Energy Security and Net zero aims to decarbonize the power sector, secure the power supply, and lower consumer prices. Whether zonal pricing achieves these goals is debatable.
Zonal pricing,as an electricity market reform,seems unlikely to lower electricity prices and drive decarbonisation on its own. Closer scrutiny of the electricity system and its mechanisms suggests it may only make things more elaborate.
The Root Cause of High Electricity Bills
The UK has the second-highest electricity price in Europe at €0.321 (£0.27) per kilowatt-hour (kWh).This is about 47% higher than the EU average of €0.218 per kWh.
Despite increased renewable energy generation, electricity prices remain about 53% higher than pre-crisis levels, even after the energy spike triggered by Russia’s invasion of Ukraine more than three years ago. Renewable electricity is the cheapest on the market, so why are prices still rising?
The UK’s high electricity prices result from system marginal pricing, which is central to the spot market. In each half-hourly auction, all electricity bid into the market is purchased at the price of the last unit needed to meet demand.
Since renewables rarely meet total demand, more expensive gas generators typically set the price. this means consumers often pay gas-generated electricity prices 98% of the time because forward markets follow the spot market.
Key Takeaway: System marginal pricing drives up electricity costs in the UK, as the most expensive source sets the price for all electricity purchased.
Will Zonal Pricing Lower electricity Prices?
On its own, no.All zones under the scheme will still have spot markets operating under the marginal pricing model. Zonal pricing doesn’t address the basic problem that’s keeping electricity prices in Britain so high.
Advocates argue that zonal pricing will encourage investment in infrastructure, such as storage and transmission, to lower electricity prices.
Grid-scale and home batteries, pumped hydro, and thermal energy storage can reduce final electricity prices by storing excess renewable energy. Transmission lines and cables ensure renewable electricity is delivered where needed.
The argument is that by creating price differences between zones, the market receives clear signals about where such investments would be most profitable.
Though, this assumes electricity prices will fall in some zones and that the market has a strong incentive to invest in high-price areas.
What prevents zones that generate a lot of renewable electricity from selling their supply at higher prices in othre zones? This could prevent renewables from meeting total demand and lead to the same price distortions currently seen due to marginal pricing.
If investments in storage and transmission are underwhelming when electricity prices are high everywhere, why would they suddenly become more likely when prices are only high in specific areas?
the argument in favour of zonal pricing is unconvincing as it doesn’t address the structural issue underlying the UK’s high electricity prices: spot markets that operate according to system marginal pricing.
If zonal pricing neither lowers consumer electricity prices nor significantly stimulates investment in storage and transmission on its own,then it is unclear what it would achieve beyond adding complexity to an already complex electricity system.
Conclusion
Implementing zonal pricing in britain’s electricity market appears to be a gamble. without addressing the core issue of system marginal pricing,it’s unlikely to deliver lower prices or significant infrastructure investment. The reform risks adding complexity without clear benefits.
Zonal Pricing in teh UK: Your Questions Answered
This article addresses the potential impact of zonal pricing on the UK’s electricity market, examining its viability as a solution to high electricity prices adn its potential impact on renewable energy investment.
Q: What is zonal pricing and how would it work in the UK electricity market?
A: Zonal pricing involves dividing the British electricity market (currently a unified market across England, Wales, and Scotland) into multiple zones.Each zone would have its own spot and forward markets, effectively creating smaller, interconnected markets. The spot market, where about 30% of electricity is traded in half-hourly auctions, would determine the price within each zone. The remaining 70% is traded in forward markets. Think of it as breaking up one big electricity marketplace into several smaller ones.
Q: Why is the UK considering zonal pricing for electricity?
A: The UK’s Department for Energy Security and Net zero aims to decarbonize the power sector, secure the power supply, and lower consumer prices. The idea behind zonal pricing is that it might incentivize investment in infrastructure like storage and transmission,potentially leading to lower electricity prices in some areas. However, the article argues that its unlikely to achieve these goals on its own.
Q: Will zonal pricing lower electricity prices for UK consumers?
A: According to the analysis, zonal pricing alone is unlikely to lower electricity prices.All zones would still operate under the current system marginal pricing model within their spot markets. This model is a core problem, as it drives up electricity costs, and zonal pricing doesn’t directly address it.
Q: What is “system marginal pricing” and why is it a problem?
A: System marginal pricing dictates that all electricity bid into the market is purchased at the price of the last (most expensive) unit needed to meet demand. As renewable sources frequently enough don’t meet total demand, more expensive gas generators typically set the price in the spot market. this means consumers often pay gas-generated electricity prices even when cheaper renewable sources are available.
Q: is the UK’s electricity expensive compared to other European countries?
A: Yes, the UK has some of the highest electricity prices in Europe. as of March 2025 the UK had the second-highest electricity price from Europe, recorded at €0.321 per kilowatt-hour (kWh) (£0.27).This is about 47% higher than the EU average of €0.218 per kWh.
Q: If zonal pricing doesn’t solve the problem, what could lead to lower electricity prices in the UK?
A: The article suggests that addressing the structural issue of system marginal pricing within the spot market is crucial. While zonal pricing advocates suggest it would incentivize investment in storage and transmission, the article casts doubt on whether this would actually occur or prove to be sufficient.
Q: Could zonal pricing encourage investment in renewable energy infrastructure?
A: Advocates believe zonal pricing would create price differences between zones, signaling where infrastructure investments (like storage and transmission) would be most profitable. However, the article raises concerns that zones with high renewable energy generation might try to sell their power at higher prices elsewhere, preventing renewables from fully meeting demand. It questions why investment would suddenly increase if prices are only high in certain zones,when investment is already underwhelming even when electricity is generally expensive.
Q: What are the potential downsides of zonal pricing?
A: The main concern is that zonal pricing might add needless complexity to an already complex electricity system without actually lowering prices or significantly boosting necessary infrastructure investment.
Q: What is the overall conclusion about zonal pricing in the UK?
A: The article concludes that implementing zonal pricing is a gamble. Without addressing the underlying issue of system marginal pricing, it’s unlikely to deliver lower prices or significant infrastructure investment. The reform risks adding complexity without delivering clear benefits.
Q: What does RenewableUK say about zonal pricing?
A: (Based on the linked web search result) RenewableUK believes that zonal pricing would significantly increase the costs of financing projects due to price volatility and potential risk for investors, even though government modeling suggests some theoretical savings.