Energy security for island nations: Legal and commercial considerations affecting power systems

Structural characteristics of island energy markets

Island-based energy projects are affected by four core challenges: 

• Demand for power may be volatile, particularly for tourism-dependent economies where seasonal population changes can materially affect electricity consumption.
• Extreme weather events and other climate-related risks can damage energy infrastructure and disrupt fuel supply chains.
• Infrastructure costs are often higher than in mainland markets due to transportation challenges and limited economies of scale.
• Most island grids are not interconnected with neighbouring systems. Electricity supply must therefore be balanced entirely within a single network, with limited surplus and no ability to import power from external markets during supply shortages.

These challenges make system resilience a priority area for many governments of island states. Possible measures to tackle these issues include improving grid infrastructure, installing backup generation capacity and improving emergency response systems.

Allocating risks in project agreements

These unique challenges faced by island nations have an impact on the allocation of risks in project agreements, particularly in relation to resilience obligations, force majeure events and insurance requirements.

Fuel supply: managing price and security risks

Although much of the discussion around island energy systems focuses on renewables, fuel supply remains central to energy security. Many island nations rely heavily on imported petroleum products – particularly diesel and heavy fuel oil – to supply thermal generation plants.

Dependence on imported fuels exposes state importers to international fuel price volatility which can have significant consequences where fuel imports represent a substantial share of national expenditure. Shipping logistics also introduce supply risks, as fuel deliveries may be disrupted by extreme weather or geopolitical events affecting global routes.

Fuel supply agreements therefore play a critical role in managing both price risk and security of supply. Long-term contracts are commonly used to stabilise pricing by linking it to international benchmarks. Electricity tariff frameworks may allow generators to pass some fuel costs through to customers. Utilities and independent power producers (“IPPs”) might also enter into hedging arrangements to lock in fixed or predictable prices for the future.

Fuel supply: fuel infrastructure

Liquefied natural gas (“LNG”) is generally available at lower, more predictable prices than oil-based fuels. Integrating this as a more affordable alternative supply of fuel can improve stability in energy-intensive industries. Introducing LNG and other alternative fuels (such as hydrogen, ammonia, biofuels or compressed natural gas) might necessitate constructing new import terminals, storage facilities and regasification units.

Projects of this nature can adopt integrated infrastructure financing structures, where financing for new or expanded fuel supply infrastructure is combined with financing for generation assets.

An integrated financing structure involves multiple asset classes that must operate together. This increases interdependence across the project and project documents (including any security packages), as well as project-on-project risk, where a failure of any element of energy infrastructure affects the entire supply chain. As fuel and other integrated infrastructure can fall under separate regulatory regimes, compliance across these regimes must be carefully co-ordinated and risks mitigated.

Grid infrastructure

Small electricity systems are subject to certain operational constraints. Island grids are typically limited in scale and may not have the flexibility to respond to rapid changes in supply or demand.

Where system operators have the right to implement load-shedding or other system protection measures to accommodate their operational constraints, power sale and purchase agreements should clearly allocate the resulting risk between the generator and the offtaker. This is particularly important for industrial offtakers who require a consistent supply to power mining, manufacturing or other operations.

Investment in grid-enhancing technologies, such as battery energy storage systems and digital network management tools, can improve system flexibility. In the longer term, more fundamental structural improvements may be appropriate. These can include upgrades to transmission and distribution infrastructure and the development of decentralised energy systems such as mini-grids or microgrids.

Mini-grids can operate either independently or in coordination with the main grid and may provide a practical solution for remote communities or critical infrastructure where extending the central grid is technically or economically challenging. A mini-grid operator can also contract to supply surplus electricity to the main grid under clear operational co-ordination, metering and pricing terms.

Demand variability and bankability

Demand variability is pronounced in island economies that rely heavily on tourism. Seasonal fluctuations in visitor numbers create sharp variations in electricity consumption, which in turn complicate generation planning and investment decisions.

Developers and investors typically require predictable revenue streams to finance new projects. To meet these requirements, generators relying on project finance or commercial investors might impose obligations on their customers to:

each to guarantee sufficient income to cover funding for their projects.

Renewable energy development and system integration

Solar energy is attractive in many Caribbean jurisdictions due to high levels of solar irradiation, whilst coastal geography may offer favourable conditions for wind power. Some volcanic island systems also benefit from geothermal resources capable of providing stable generation.

Solar and wind generation plants produce variable output depending on weather conditions. As with variable demand, larger electricity systems can absorb variable supply through regional balancing markets or extensive transmission networks. By contrast, smaller grids may have limited capacity to accommodate intermittent generation without additional system flexibility.

Energy storage technologies are therefore becoming increasingly important in energy systems that integrate renewable supply. These technologies can be especially valuable for balancing smaller energy systems. Battery energy storage systems (“BESS”) can store excess power during periods of high generation and release power when demand increases. This helps to stabilise grid frequency and enables renewable generation to play a bigger role in powering island states.

Storage projects raise several specific legal and structuring issues. Multiple services (including energy arbitrage and grid balancing) might provide revenue streams for the same project. Contractual frameworks must therefore clearly allocate operational responsibilities and define how revenues from different services will be allocated.

Distributed energy and digitisation

Digitisation of grid operations, combined with improved monitoring and analysis tools, can help to manage supply and demand more efficiently.

Virtual Power Plants (“VPPs”) aggregate multiple distributed power sources, such as mini-grids, rooftop solar installations, battery systems and small-scale generation assets, and coordinate their operation through digital platforms. By controlling these assets collectively, VPP operators can create a flexible power resource capable of supporting grid stability.

VPPs may be attractive in island markets where centralised infrastructure is expensive to develop and maintain. However, their deployment raises important regulatory questions. Frameworks affecting grid access, generation licensing, data governance, cybersecurity and operational control of network assets must all be addressed for such systems to operate effectively.

Operational and power supply contracts for a virtual power plant should include portfolio management provisions, data sharing and data ownership rules (including for personal data where the VPP is processing data related to household usage) and metering provisions for the various distributed assets. The delivery obligations of a supplier supplying from a VPP will be based on aggregated performance across many assets.

Regulatory frameworks

Developing energy infrastructure is capital intensive and regulatory stability is critical to attracting capital investment. Governments seeking to expand generation capacity must develop and maintain frameworks that provide clarity and predictability for investors. From the investors’ perspective, the bankability of regulatory frameworks, particularly the enforceability of tariffs and contractual payment obligations, remains a central consideration.

Multilateral organisations (such as CARICOM) have considered greater regional harmonisation of regulatory frameworks across regions. Standardised regulatory structures, model PPAs or regional regulatory institutions could facilitate cross-border investment and allow smaller islands to benefit from some of the economies of scale seen in larger markets.

Government procurement and incentive programmes

Government procurement and incentive programmes can bridge gaps in funding and encourage private investment by mitigating key risks affecting energy and power projects. A procurement programme might offer:

1. Feed-in-tariffs: Contractual arrangements guaranteeing generators a fixed price for energy generated.
2. Capital subsidies and grants: Upfront contributions to the capital costs associated with a project.
3. Concessional financing: Loans offered on favourable terms alongside or in the place of commercial loans.
4. Guarantees and risk mitigation instruments: Government or multilateral-backed guarantees to insulate investors and lenders from key project risks (such as payment default, currency inconvertibility and/or political risk).
5. Land access or permitting support: Streamlined access to suitable sites and expedited licensing processes to support project development and reduce delay-related costs.

Authored by Johari Adjei.