For developers and large energy users alike, securing export capacity can often become the bottleneck that limits how much renewable electricity a project can generate and export to the grid. However, recent policy developments from the Commission for Regulation of Utilities (CRU) are beginning to change how these projects can be structured — particularly when solar generation is combined with battery storage.The introduction of shared Maximum Export Capacity (MEC) arrangements behind a single connection point represents a significant step forward for hybrid renewable energy projects in Ireland.

What Is Shared MEC?

Under the new policy framework, multiple technologies — such as solar PV and battery energy storage systems (BESS) — can now operate behind a single grid connection point while dynamically sharing the same Maximum Export Capacity.

In practical terms, this means that solar and storage assets can work together under one export limit without breaching grid connection constraints.

The policy is particularly important for hybrid co-located projects, where solar generation and battery storage are installed together and managed as separate technologies, but share one overall export cap to the grid.

This creates a much more flexible and efficient use of existing grid infrastructure.

Why This Matters for Solar Projects

Historically, many solar projects have been limited not by the ability to generate renewable electricity, but by restrictions around how much power could be exported at any given time. Shared MEC arrangements help address this challenge by allowing projects to maximise the use of existing grid capacity without waiting for expensive or time-consuming network upgrades.

For solar developers, this can significantly improve project economics and accelerate delivery timelines. Rather than curtailing excess generation during peak solar periods, battery systems can absorb surplus electricity and release it later when grid capacity becomes available again.

This creates a more stable and controllable export profile while increasing the overall utilisation of the connection point.

The Role of Battery Storage

Battery storage is the key technology enabling the full value of shared MEC projects.When paired with solar generation, batteries provide operational flexibility by:

• Absorbing excess solar generation during high production periods
• Releasing stored energy during periods of higher demand
• Smoothing fluctuations in export output
• Supporting more reliable compliance with MEC limits
• Enabling participation in additional grid services markets

This approach not only increases the overall efficiency of the solar project but can also unlock multiple additional revenue streams, including:

• Energy arbitrage
• Frequency response services
• Grid balancing services
• Capacity optimisation

In constrained areas of the network, battery storage can effectively extend the usable export window for solar generation by shifting electricity production into periods where export capacity would otherwise be underutilised.

Operational Control and Compliance

While the technologies share one export capacity limit, each generation asset remains separately registered and governed under its own operational framework. Developers are responsible for ensuring that the combined export from solar and battery systems remains within the approved MEC at all times.

To achieve this, projects require integrated control and tripping mechanisms capable of dynamically managing output across technologies.

This creates a more sophisticated operating environment, but also a far more commercially efficient one.

A Major Step for Renewable Integration in Ireland

The CRU’s shared MEC policy forms part of a broader programme focused on hybrid renewable technologies and more efficient use of Ireland’s existing grid infrastructure.

Rather than relying solely on large-scale network reinforcement, the policy supports smarter integration of renewable generation and storage assets within existing connection constraints.

For developers, investors, and large energy users, this represents a meaningful opportunity to improve project viability while supporting Ireland’s renewable energy transition.

What This Means for the Market

As grid constraints continue to shape the Irish renewable energy landscape, solar-plus-storage projects are likely to become increasingly important. Shared MEC structures reduce one of the largest barriers to renewable project development: access to export capacity.

For commercial and utility-scale solar developers, the ability to co-locate battery storage behind a single connection point opens new opportunities to:

• Improve project economics
• Increase export efficiency
• Reduce curtailment risk
• Accelerate project timelines
• Unlock additional revenue streams

Ultimately, the policy supports a more flexible, resilient, and commercially viable renewable energy system.

Looking Ahead

The Irish energy market is evolving quickly, and hybrid renewable energy projects are expected to play an increasingly important role in balancing generation, storage, and grid stability.

For organisations considering utility-scale solar, battery storage, or hybrid energy infrastructure, understanding how shared MEC structures work will become increasingly important when evaluating future project opportunities.

At Shannon Energy, we continue to monitor policy developments, grid integration strategies, and emerging renewable energy technologies to help clients navigate the evolving energy landscape and identify commercially viable renewable energy opportunities.

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