Hyperscale Data Centres to Spark US Power Surge, But Risks Loom
S&P Global reports that expanding hyperscale data centres will drive US power capacity growth through 2028, though concentration risks remain.
The landscape of energy in the United States is witnessing a dramatic shift. After decades of stagnant consumption, the rapid expansion of US power generation capacity is being revitalized, driven primarily by the insatiable electricity needs of hyperscale data centres. According to a recent report by S&P Global, this surge is expected to push generation capacity growth at a compound annual growth rate of more than 5 per cent through 2028.
A New Era for US Utilities
For years, electricity demand in the US remained largely flat. However, the AI boom and the proliferation of massive data hubs have changed the equation. S&P Global suggests that this spike in demand creates significant opportunities for US utilities. Increased consumption could potentially help these companies offset delays in recovering costs through regulated rates, thereby strengthening their overall financial performance and credit quality.
The Strategy: Special Tariffs for Big Tech
To manage this influx of massive energy users, utilities are collaborating with regulators to implement specialized tariffs tailored for large electricity consumers. These "large-load tariffs" aim to bring transparency to the pricing and fees applicable to the industry's biggest players.
However, the report notes a layer of complexity: while public tariffs provide a baseline, many utilities enter into private, individual agreements with hyperscale operators. These bespoke contracts often contain additional clauses designed to shield utilities from financial risks that standard tariffs might not cover.
The Danger of Concentration
Despite the growth, S&P Global warns that putting too many eggs in one basket is a gamble. The report explicitly states that reliance on a single industry and a highly concentrated customer base introduces "considerable risk." Because much of the risk exposure is hidden within private contracts rather than public tariffs, it remains difficult for analysts to fully evaluate how vulnerable a utility might be if a major hyperscaler falters.
Safeguarding the Grid: Long-Term Commitments
To mitigate these risks, utilities are leaning on long-term structural protections. Typical agreements with data centre operators are not short-term fixes; they generally span at least 12 years and can extend up to 20 years.
These contracts often include several financial safeguards:
- Minimum Payment Requirements: On average, these cover approximately 85 per cent of fixed costs, ensuring the utility isn't left with stranded assets.
- Termination Fees: Heavy penalties for exiting contracts early.
- Collateral Provisions: Financial guarantees that protect the utility against losses.
Notably, these protections can be triggered even if a hyperscaler's credit rating drops below 'A-'. While these measures help stabilize credit quality and limit financial exposure, the report points out that many utilities are still in the process of securing official regulatory approval for these large-load tariffs.