Gas Turbines and the Data Centre Backlog

Imagine ordering a car today and being told, with a straight face, that the earliest possible delivery slot is five to seven years away, and that this is true no matter which showroom you walk into, because there are only three factories on the planet capable of building the model at all. That is roughly the position anyone trying to buy a heavy-duty gas turbine is in right now, a machine that burns natural gas to spin a turbine connected to a generator, the same basic workhorse that has quietly supplied grid power for decades, suddenly turned into the single tightest physical bottleneck behind the global AI data centre boom.

The reason is straightforward once the demand side is understood: a large data centre needs power measured in the hundreds of megawatts, covered elsewhere on this site under India's data centre capacity boom, and grid interconnection queues in most countries take years to clear, so developers increasingly want to generate power on-site, "behind the meter," using their own turbines rather than waiting for a utility connection. Only three manufacturers build these heavy industrial-frame turbines at scale, GE Vernova, Siemens Energy and Mitsubishi Power, and all three are now sold out years in advance, GE Vernova's backlog alone had reached roughly 116 GW with slots being sold into 2029 and 2030, Siemens Energy reported a record order backlog worth over €136 billion, and Mitsubishi Power is effectively sold out through 2028 even while doubling its own manufacturing capacity.

What makes this bottleneck structural rather than temporary is simple arithmetic: global orders for gas turbines reached an estimated 100 GW by the end of 2025, while the three manufacturers' combined global manufacturing capacity is only around 60 to 70 GW a year, meaning the queue lengthens even as factories run flat out, and lead times that used to run two to three years before the AI boom now commonly run five, with some large frames quoted at seven.

India has no domestic manufacturer building turbines at this scale and voltage class, so any Indian data centre operator or conglomerate choosing to power a campus with its own gas turbine, rather than aeroderivative turbines or reciprocating engines covered elsewhere on this site, is competing for the exact same constrained global order books as every hyperscaler in the United States and the Gulf, which is one of the quieter reasons India's hyperscale data centre megaprojects, covered elsewhere on this site, so often lean on renewable power, grid supply and diesel or gas gensets for backup rather than committing to a gas turbine of their own.

This is the backlog investors are actually referring to whenever a GE Vernova or Siemens Energy earnings call cites gas power order intake as a headline number, and it is the reason a data centre developer's investor deck will sometimes disclose a turbine delivery date years out as a genuine project-timeline risk, on the same page as land acquisition and grid approval.