Cyprus curtailed an estimated 306 gigawatt-hours of solar energy in 2025 due to grid constraints, according to industry estimates. Volume is equivalent to the annual electricity consumption of around 51,000 households. At the same time, the electricity sector incurred €250–350 million in EU carbon allowance costs. Battery storage systems offer a way to use surplus renewable energy and reduce these losses.

Understanding The Scale Of Energy Curtailment

Curtailment levels increased sharply in recent years. Rates were negligible four years ago, reached 29% in 2024, and approached 46% in 2025 as rooftop solar capacity expanded. Limited storage capacity and lack of interconnection prevent export of excess electricity, increasing pressure on the grid as new capacity is added. Annual curtailed volume exceeds the electricity consumption of the city of Paphos.

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The Promise Of Battery Storage

Battery storage systems allow excess energy generated during low-demand periods to be stored and used during peak hours. Data from the Cyprus Transmission System Operator’s Day-Ahead Market between October 2025 and February 2026 show a consistent price spread between midday and evening periods. Average prices reached €101 per megawatt-hour during midday hours and €183 during evening peaks, supporting a positive revenue model for storage deployment.

A 5 MW solar park combined with a 20 MWh battery system can generate approximately €294,000 annually by capturing curtailed energy. Payback period for such systems is estimated at six to nine years, followed by continued revenue generation.

Regulatory Progress And Remaining Challenges

Cyprus introduced regulatory changes in January 2026, allowing solar park operators to integrate battery storage systems. The framework was developed by CERA and the DSO under a Category B structure. Current rules limit participation in the electricity market, as storage systems cannot operate independently and must charge only from co-located solar generation.

Scaling Impact And Market Integration

Public investment includes a 120 MW / 400 MWh battery system supported in part by the EU Just Transition Fund. The project supports grid stability but does not address system-wide storage needs. More than 1,000 MW of potential storage capacity is held by 33 private companies, indicating scope for broader deployment if market access expands.

“We are now entering a European BESS cycle. The first wave of solar and wind installations has reached grid limits. Battery storage enables further renewable expansion,” said Dr Arkadius Sybaris.

Economic And Security Imperatives

Cyprus spends €250–350 million annually on EU Emissions Trading allowances, reflecting continued reliance on fossil fuels. Curtailment of renewable energy contributes to higher system costs. Experience from Ireland and the United Kingdom shows battery storage can reduce fossil fuel dependence and improve grid stability.

Grid-forming battery systems have already been ordered by operators in Cyprus, but remain underutilized under current regulations. “We are not talking about future technology. Grid-forming battery systems are already deployed across Europe. Hardware is available, but regulatory approval is required for operation,” said Alexander Papacosta, Managing Director of Lighthief Cyprus & Greece.

The Path Forward

Expanding the value of renewable energy in Cyprus requires regulatory and market adjustments. In other EU markets, storage operators participate in day-ahead trading, provide ancillary services, and support grid stability. Policy changes could include allowing battery systems to operate as market participants, enabling participation in balancing services, and permitting grid-forming systems to provide inertia support. Implementation of these measures would increase system efficiency and reduce curtailment.

About Lighthief Energy Group

Dr Arkadius Sybaris is the founder of Lighthief International, a renewable energy group active in 11 European nations. Lighthief Cyprus manages a portfolio of battery storage projects totaling 249 MW/882 MWh across 51 licensed solar parks on the island. Alexander Papacosta is the Managing Director of Lighthief Cyprus & Greece.