Eiser Infrastructure Limited and Energía Solar Luxembourg S.à r.l. v. Kingdom of Spain
ICSID · Investment (ICSID and treaty) · Spain · 4 May 2017
Why it matters
This is a landmark award in the wave of ICSID claims against Spain for retroactive changes to its renewable energy incentives. The tribunal established that Spain's drastic tariff reforms breached the fair and equitable treatment standard by destroying the regulatory framework that investors relied upon. It clarified that legitimate expectations under the ECT require a stable legal environment for long-term investments, and that compensation should reflect the loss of future cash flows.
Summary
Eiser Infrastructure Limited and Energía Solar Luxembourg S.à r.l. invested in three concentrated solar power plants in Spain, relying on a special regulatory regime (Real Decreto 661/2007) that guaranteed a premium tariff for electricity generated from renewable sources. In 2010 and 2012, Spain enacted reforms that drastically reduced these tariffs, eliminating the premium and imposing new taxes. The investors claimed these measures violated the Energy Charter Treaty (ECT), particularly the fair and equitable treatment (FET) standard. Spain raised several jurisdictional objections, including that the dispute was intra-EU and thus outside ICSID jurisdiction, but the tribunal rejected these. On the merits, the tribunal found that Spain's reforms were not merely regulatory changes but fundamentally altered the investment's economic basis, breaching the FET standard. The tribunal awarded EUR 128 million in damages, representing the loss of future cash flows (excluding a disputed 40-year plant life assumption), plus interest. The award is significant for its detailed analysis of legitimate expectations in the renewable energy context and its rejection of the intra-EU objection.
The detail
Parties: Eiser Infrastructure Limited and Energía Solar Luxembourg S.à r.l. v. Kingdom of Spain
Case number: ICSID Case No. ARB/13/36
Outcome: The Tribunal found Spain violated the fair and equitable treatment standard under Article 10(1) of the Energy Charter Treaty and awarded Claimants EUR 128 million in damages plus interest.
Quantum: EUR 128 million
Applicable law: Energy Charter Treaty (ECT), ICSID Convention, Spanish law
Issues in play: The case involved a collision between Spain's sovereign right to regulate its renewable energy sector and the investors' legitimate expectations of regulatory stability under the ECT's fair and equitable treatment standard.
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