Issue #13: APCL's Diesel Dependency: Costs, Risks, and the Exit Path

The Antigua Power Company Limited is the largest single source of carbon emissions in Antigua & Barbuda, the largest consumer of foreign exchange for fuel imports, and the primary reason the island's electricity costs are as high as they are. Understanding APCL's situation — its costs, its aging fleet, and the credible alternatives — is essential context for anyone tracking the island's energy future.

The Scale of the Problem

APCL's Crabbs Peninsula generation facility burns approximately 28 million liters of diesel and heavy fuel oil per year to supply roughly 60% of Antigua's electricity needs (APUA's own generation plant, also primarily diesel, covers the remainder). At current fuel prices of approximately XCD 4.30 per liter, the annual fuel cost is approximately XCD 120 million. This figure is not hypothetical — it's a direct drain on the island's foreign exchange reserves, representing roughly 18-20% of Antigua's total import bill.

The generation fleet is old. APCL's three primary diesel generators date from the late 1980s and early 1990s, with the newest major unit commissioned in 1994. These units operate at thermal efficiencies of 32-35% — meaning 65-68% of the energy in the diesel burned is wasted as heat rather than converted to electricity. Modern gas turbine combined-cycle plants achieve 55-60% efficiency, and modern solar panels convert sunlight directly to electricity at 20-22% efficiency — but at zero marginal fuel cost. Each year of continued operation with the aging fleet is a year of unnecessary inefficiency.

The IDB Study's Proposed Replacement Scenario

An IDB-commissioned engineering study circulated in late 2025 proposes a phased replacement scenario for Antigua's generation fleet: a 30MW ground-mounted solar array (to be built on available land near the airport or Crabbs Peninsula) paired with a 15MWh battery storage system, supplemented by a 20MW gas turbine peaker for backup and nighttime load. The capital cost of this configuration is estimated at approximately USD$95M (roughly XCD 257M) — a large number, but one that the study claims would be recovered in approximately 6.5 years through fuel savings alone.

The savings logic: the solar-plus-storage configuration eliminates diesel burning during approximately 70% of annual generation hours. The remaining 30% of hours, served by the gas peaker, would use liquefied natural gas (LNG) — available at approximately XCD 2.10 per liter diesel-equivalent, versus XCD 4.30 for diesel. The combined effect is an annual fuel cost reduction from XCD 120M to approximately XCD 80M — savings of XCD 40M per year. Over a 20-year project life, the net present value of fuel savings is well over USD$400M, dwarfing the capital cost. The financial case is not close; it is overwhelming.

What's Stopping the Transition?

If the financial case is overwhelming, why hasn't the transition happened? Three obstacles. First, upfront capital: USD$95M is a large sum for a government with constrained fiscal space, and commercial lenders charge rates that make the project marginal without concessional financing. The IDB and CDB have both indicated willingness to provide financing at favorable terms, but closing the deal requires government to commit to the project and navigate procurement rules. Second, APCL's private ownership structure: APCL is not a government entity, and any transition plan must either involve APCL in the transition or compensate it for stranded assets — a negotiation that has proven politically difficult. Third, institutional inertia: diesel generation has been Antigua's default for 60 years, and changing that default requires political will, technical capacity, and regulatory reform to all align simultaneously.