Regulatory and Market Barriers to Energy Storage Deployment

The Challenge: Making Storage Pay

The fundamental challenge for any energy storage project is financial viability. Unlike a simple power plant that generates and sells electricity, a storage asset has a more complex business model. It must earn revenue from a combination of activities, often referred to as a "revenue stack." This stack might include:

• Energy Arbitrage: Buying electricity when it's cheap (e.g., midday when solar is abundant) and selling it when it's expensive (e.g., during the evening peak).
• Ancillary Services: Getting paid by the National Grid Electricity System Operator (ESO) to provide services that keep the grid stable, such as frequency response.
• Capacity Market: Earning a steady payment for being available to provide power during periods of system stress, ensuring security of supply.

The problem is that these revenue streams are often volatile, uncertain, and subject to changing market rules, creating significant barriers for investors.

Market Barrier 1: A Volatile and Evolving Revenue Stack

The combination of revenues that a battery can earn is constantly changing. What was profitable yesterday might not be profitable tomorrow. This uncertainty is a major barrier to securing the large upfront investment needed to build a storage facility.

Let's look at a report from Rabobank that explains this dynamic.

As the article highlights, the key trend has been a move away from frequency services and towards energy arbitrage. This is because the market for frequency services became saturated.

• Market Saturation: In the early days of BESS, there were few batteries on the system, so the ESO paid high prices for their very fast frequency response services. This was a lucrative market. However, as more and more batteries were built, the supply of this service exceeded the ESO's demand. This increased competition caused prices to crash, making this revenue stream far less attractive.

This is a classic market barrier: a victim of its own success. The image below shows the typical monthly revenue for a UK battery, illustrating how the different components of the revenue stack add up and fluctuate over time.

Market Barrier 2: Imperfect Markets and System Limitations

Even as batteries pivot to energy arbitrage, they face further barriers. A key source of arbitrage revenue is the Balancing Mechanism (BM), where the ESO pays participants to increase or decrease generation/demand in real-time to balance the grid.

However, batteries have historically been at a disadvantage in this market.

The issue of high skip rates is a perfect example of a market barrier caused by system limitations. The ESO's legacy systems were not designed for assets like batteries that have limited energy storage (a state of charge). Engineers couldn't be sure how much energy a battery had available, so to be safe, they would often dispatch a traditional gas power plant instead, even at a higher cost to the consumer.

While new systems like the Open Balancing Platform are improving this, it demonstrates how existing market infrastructure can create barriers for new technologies.

Market Barrier 3: The Long-Duration Storage Problem

The market barriers become even more pronounced for Long-Duration Energy Storage (LDES)—technologies designed to store energy for many hours, days, or even weeks. As we discussed, these are vital for tackling seasonal variations, like storing excess solar power from the summer to use in the winter.

The problem is that current electricity markets don't provide a clear financial incentive for this.

As Rosie explains, the market strongly rewards assets that can cycle daily to profit from the price difference between cheap midday solar and expensive evening peaks. There is no equivalent, reliable price signal to encourage an investor to build an asset that charges in July and discharges in January.

This is a fundamental market design failure. To overcome it, the government is developing a new support mechanism called a "cap and floor," which would provide a guaranteed minimum revenue for LDES projects to make them investable.

Regulatory and Procedural Barriers

Beyond the market challenges of making money, developers face a gauntlet of regulatory and procedural hurdles just to get a project off the ground.

Regulatory Barrier 1: The Grid Connection Queue

Perhaps the single biggest barrier today is the difficulty of securing a connection to the grid. Even with a fully funded and planned project, developers can face waits of over 10-15 years due to a massive backlog of applications.

This connection backlog freezes billions of pounds of investment and is a direct brake on the energy transition. The reforms underway are an attempt to clear this logjam by prioritising viable projects, but it remains a slow and complex process.

Regulatory Barrier 2: Planning, Permitting, and "Double Charging"

Like any major infrastructure, an energy storage project needs planning permission, and the process can be long and uncertain.

As the article mentions, the key barriers in this area include:

• Planning Consent: A process that can take over a year and involves detailed environmental, noise, and safety assessments.
• High Upfront Capital Costs: While falling, BESS projects are still multi-million-pound investments.
• Supply Chain Dependence: The UK is heavily reliant on imports for batteries and critical minerals like lithium, creating strategic risks.

Another significant regulatory flaw is the issue of "double charging." Because storage both imports and exports electricity, some regulations treat it as both an end consumer and a generator. This means it can be hit with network charges and policy levies twice—once on the way in, and again on the way out.

Conclusion

Deploying energy storage at the scale needed for net zero is not just a technical challenge; it is an economic and regulatory one. While the technology is ready, the frameworks to support it are still catching up.

Key Takeaways:

• Market Barriers: Business cases for storage are hampered by volatile and unpredictable revenue stacks. Ancillary service markets like frequency response have become saturated, and the market design provides poor incentives for long-duration storage.
• Regulatory Barriers: The biggest hurdles are the enormous grid connection queues, which can delay projects for over a decade. Slow planning processes and unfair regulatory treatment like "double charging" also add significant cost and risk.
• Financial & Strategic Barriers: High upfront capital costs and a heavy reliance on global supply chains for batteries and critical minerals pose further challenges.

Preview of the next lesson:

Energy storage is a "supply-side" flexibility solution—it helps the supply of electricity match demand. But what if we could make demand more flexible instead? In our next lesson, we will explore demand-side response, examining the technologies and market structures that encourage electricity users to change their consumption patterns to help balance the grid.