A generation ago, an energy arbitrator’s caseload was built almost entirely around upstream oil and gas: joint operating agreements, production sharing contracts, long-term LNG supply disputes. That world still exists. But it now sits alongside an entirely new docket: power purchase agreements, grid connection disputes, offshore wind construction claims, and investment treaty cases over withdrawn solar subsidies. The energy dispute arbitrator has not been replaced by the transition; the role has simply expanded to cover it and has become one of the most in-demand specializations in international arbitration.
A Sector in Structural Flux
Energy disputes are rising for reasons that have little to do with any single commodity cycle. Climate-driven regulatory tightening is pushing energy and construction companies toward more stringent emissions rules, feeding a fresh wave of climate-related arbitration. The pace of renewable buildout has produced its own friction- schedule slippage, cost overruns and cancelled projects are now a recurring category of dispute in their own right, while growing grid connection queues are driving curtailment and outage-related claims between developers, transmission operators and off-takers.
Traditional hydrocarbon disputes remain very much alive. 2025 delivered one of the sector’s most closely watched joint operating agreement rulings, when an ICC tribunal decided the Stabroek block dispute between ExxonMobil and Hess over offshore Guyana in Hess’s favor a decision expected to shape how right-of-first-refusal clauses are drafted across the industry. Looking into 2026, specialists expect further growth around decommissioning obligations, LNG pricing disputes and sanctions-driven disruption claims. Tellingly, decommissioning disputes that once belonged exclusively to ageing oil platforms are now starting to surface in the renewable sector too, as early wind farms approach end-of-life.
The energy dispute arbitrator today needs fluency in production sharing contracts and power purchase agreements alike; the two now regularly appear in the same practice, sometimes in the same week.
The Investment Treaty Reckoning: Spain’s Solar Saga
No case history illustrates the stakes of the energy transition more starkly than Spain’s renewable disputes. Between 2007 and 2010, Spain built one of the world’s most generous feed-in tariff regimes, becoming responsible for roughly half of all new solar installations globally at its peak. When a tariff deficit and the financial crisis forced Spain to unwind those incentives from 2010 onward, investors responded with a wave of Energy Charter Treaty claims well over fifty arbitrations in total- seeking damages estimated at around eight billion euros.
The results have been anything but uniform. In Eiser Infrastructure v. Spain, an ICSID tribunal ordered Spain to pay €128 million after finding the changes breached the Energy Charter Treaty’s fair and equitable treatment standard. Yet in Isolux v. Spain, a tribunal examining materially similar facts found in Spain’s favor. Most known awards have favored investors, but tribunals have split sharply over damages calculation, and Spain’s difficulty enforcing several awards has become its own case study in arbitration’s enforcement limits. The lesson is unambiguous: regulatory support for clean energy is not static, and treaty protection needs to be structured into a project from day one, not reached for after a subsidy has already been cut.
Why the Role Now Demands Range
A single energy dispute today can touch several distinct bodies of law within one proceeding:
- Contractual complexity. Power purchase agreements, EPC contracts for wind and solar construction, and joint operating agreements for upstream projects each carry distinct risk allocations that a generalist arbitrator may not have encountered.
- Treaty-level exposure. Renewable and hydrocarbon investments alike remain exposed to investor-state claims when governments change course on subsidies or permitting, demanding fluency in commercial and public international law alike.
- Technical valuation. Quantifying lost revenue from a curtailed wind farm calls for the same valuation rigour as a stranded oil platform even as the underlying models and assumptions differ substantially.
As an energy dispute arbitrator, this work spans both ends of that spectrum: upstream production disputes on one file, renewable investment treaty claims on the next. That range overlaps with adjacent practice areas too: an infrastructure dispute arbitrator is regularly drawn into offshore wind and solar EPC disputes over delay and cost overruns, while an investment treaty dispute arbitrator is the natural forum for the fair and equitable treatment claims that renewable subsidy reversals continue to generate. Where energy projects are structured as consortiums, disputes between co-developers increasingly land with a joint venture & partnership dispute arbitrator instead, echoing the joint-operating-agreement disputes that have long defined upstream oil and gas.
As the sector’s centre of gravity keeps shifting from platforms to panels, from long-term supply contracts to power purchase agreements, the arbitrators who can move fluently between both worlds will remain the ones parties turn to first. Harshavardhan Sancheti, FCIArb, is accepting appointment as sole arbitrator in disputes spanning oil and gas, renewables, infrastructure and investment treaty claims, bringing exactly this cross-sector perspective to bear.
