Meridiam Takes 66%, Overrun Risk Stays Hidden

French infrastructure investor Meridiam agreed this week to buy 66% of the Great Sea Interconnector, the planned subsea electricity cable linking Crete to Cyprus (Greek Prime Minister). Greece's grid operator ADMIE keeps 34% and the technical lead (Powergame). The deal gives the stalled project something it lacked: a private investor willing to put real money behind it. But the shareholder agreement, including who absorbs cost overruns, has not been published. For a €1.9 billion cable paid partly through consumer electricity bills, that gap matters.

Cyprus is the only EU member state whose electricity grid operates in complete isolation from the European system (European Commission). The interconnector would give the island access to the continental power market and reduce its dependence on imported fuel. That integration is the policy prize. The fight is over who carries the construction bill if things go wrong.

Who Carries the Cost

The Crete-to-Cyprus section is estimated at €1.9 billion (Knews Kathimerini Cyprus). About €657 million comes from the EU's Connecting Europe Facility, a grant programme for cross-border infrastructure (Cyprus Mail). The rest must come from equity, debt and regulated revenue, meaning consumers pay through network charges on their electricity bills.

Regulators split that long-term burden 63% Cyprus, 37% Greece, on the grounds that Cyprus gains more from ending its isolation (Kathimerini Cyprus).

Cypriot consumers are also being asked to pay before the cable works: €25 million a year for five years, or €125 million in total, during the construction period (Iefimerida). The first instalment was frozen after officials cited incomplete implementation and disputes over where the money should come from (Cyprus Mail). In other words, Cyprus is already resisting payment for a cable that does not yet exist.

What Meridiam's Money Actually Buys

Meridiam will fund the remaining 40% of seabed surveys, the technical step needed to fix the cable route, and may reimburse ADMIE for 66% of the €251.4 million the grid operator has already spent (Powergame). A parallel agreement with French cable manufacturer Nexans targets a survey restart from September (SigmaLive).

None of this equals financial close, the point where the full financing package is legally committed. Cyprus's Energy Minister Michael Damianos said his government is still waiting for European Investment Bank due diligence before deciding whether the state will take an equity stake (Euronews Greek). As we reported when the agreement was announced, ownership has changed hands but the decisive financial commitments remain ahead. The acquisition price, board composition, veto rights and overrun allocation are all undisclosed.

The Cable Runs Through Contested Waters

Les Echos framed Meridiam's entry around Turkish pressure, Cypriot disputes and Franco-Greek alignment (Les Echos). This is not separate from the money question. Survey ships working in contested waters can face delays. Delays raise contractor and financing costs. And the unpublished shareholder agreement is where it would say whether private capital or public tariffs absorb the increase. The European Court of Auditors has warned that EU cross-border electricity projects face persistent delays even when the policy case is strong (European Court of Auditors).

If the project succeeds, Cyprus gains the most: a path out of electricity isolation into a market that can improve supply security and bring cheaper imports. Meridiam and ADMIE gain a regulated asset with a reported allowed return of 8.3% plus a 3.7% premium for 17 years (Kathimerini). Greek consumers carry less direct weight at 37%, but ADMIE's €251.4 million outlay means the Greek regulated system has capital at risk too.

The clearest losers if costs rise are Cypriot consumers, sitting on the 63% side and paying construction charges before a single electron flows. Meridiam's deal makes the project more credible. It does not make it more transparent.