Diesel Generator Shortage Hits Data Centers Amid AI Infrastructure Boom

The AI compute race has sparked an unexpected shortage of diesel generators used for backup power in data centers. Orders for high-power units from major manufacturers like Cummins, Caterpillar, and Rolls-Royce are fully booked through 2027 to 2028.

This is driven by the rapid growth in demand for AI infrastructure investment, with tech giants like Alphabet, Meta, Amazon, Microsoft, and Alibaba all increasing their capital expenditure on data centers. Google's parent company, Alphabet, has reported an order backlog exceeding $514 billion, which will persist for at least two years.

According to a McKinsey report, global data center demand is expected to grow from approximately 82 gigawatts in 2025 to roughly 220 gigawatts by 2030, nearly tripling. Meanwhile, the supply side faces constraints due to complex supply chains, requiring coordination across upstream and downstream suppliers.

Domestic manufacturers like Weichai Power are benefiting from the shortage, with their data center engine sales surging more than 240% year-over-year in Q1 2026. Goldman Sachs projects that by 2030, Weichai's data center generator business will grow from 10% to one-third of company profits.