Rolls-Royce recorded a 62% year-on-year increase in Power Systems order intake during the first nine months of 2026, with demand for gas-engine generation equipment accelerating as data-centre operators expand their requirements for independent electricity supply.
The division's order backlog reached a record £8.6 billion at the end of September, compared with £8.0 billion at the half-year stage. Gas-engine orders within its power generation business nearly tripled year on year, while demand for diesel backup generation remained strong.
The increase in orders is accompanied by investment in production capacity and development of a new generation of engines. Rolls-Royce opened a $24 million logistics and operations centre in Mankato, Minnesota, during July, enabling a substantial expansion of generator set manufacturing.
The company is also finalising a significant multi-year agreement to supply backup engines to a hyperscale computing customer, alongside a proposed framework extending to 2031. The agreements remain under negotiation and have not been described as completed contracts.
Data-centre power requirements are contributing to demand across different generating applications. Gas engines are being ordered for prime power installations, while diesel generator sets continue to serve facilities requiring standby capacity when their normal electricity supply becomes unavailable.
These operating duties place different demands on generating equipment. A standby installation may operate infrequently but must be capable of starting and accepting electrical load when required. A prime power installation may operate for much longer periods and requires equipment selected for the intended running hours and load profile.
The generating system extends beyond the engine itself. An installation combines the mechanical prime mover with an alternator, fuel supply, cooling equipment, exhaust arrangements, electrical protection and controls.
Each element must be sized and configured for the required electrical output and operating conditions. A generator capable of producing sufficient power under one set of conditions may require different supporting equipment when installed in another location or operated under a different duty cycle.
Load acceptance is particularly important in critical power applications. When electrical demand changes, the generating system must respond while maintaining the voltage and frequency needed by connected equipment.
Its behaviour depends on the engine, governor, alternator and control system, together with the way the installation manages the transfer and distribution of electrical load. Suitable testing is required to establish performance under the conditions specified for the facility.
Rolls-Royce's mtu Series 4000 generator sets are used across data centres, hospitals, airports and industrial facilities. The equipment can be configured for different applications, with the selected engine, alternator and supporting systems determining its final performance.
The new Mankato logistics and operations centre provides approximately 250,000 sq ft of additional space beside the existing manufacturing facility. Around two-thirds of the building is dedicated to logistics activities, while the remaining area supports production.
The expansion is intended to more than double the site's production capacity for mtu Series 4000 generator sets, creating over 100 local jobs. The company has not stated that actual annual deliveries have already doubled following the building's opening.
Additional assembly space helps address growing equipment demand, but manufacturing throughput also depends on the availability and timely delivery of engines, alternators, electrical components and other parts.
Generator sets contain large mechanical and electrical assemblies that must be brought together in the correct sequence. Production planning must account for the configuration of individual customer orders, component testing and the inspections required before equipment is released for delivery.
Rolls-Royce manufactures the Series 4000 engines used in its American generator sets at Aiken, South Carolina. The Mankato operation integrates these engines into generating equipment, connecting two important stages of the company's US manufacturing network.
The company has also committed $75 million to expanding its Aiken operation, increasing machining capabilities and supporting further engine production. That programme complements the new logistics and assembly capacity in Minnesota.
Engine manufacturing and generator set assembly have related but distinct capacity requirements. Greater assembly space cannot compensate indefinitely for a shortage of completed engines, while additional engines must be matched with alternators and other equipment before they can become finished generator sets.
Production growth therefore requires coordination between manufacturing locations and the companies supplying specialist components. Delivery schedules can be affected by the availability of individual items even where most of the required equipment is ready.
Rolls-Royce is developing a next-generation engine scheduled for introduction in 2028. The company expects it to provide 20% higher power density than the current Series 4000, with engine and system testing progressing during 2026.
Higher power density can allow greater output within a given engine package, although the dimensions and performance of a complete generator installation also depend on cooling equipment, exhaust arrangements, access requirements and electrical components.
The announced improvement is a development target for the new engine rather than a measured increase in output across existing customer installations. Final commercial specifications and application-dependent performance will become clearer as the programme approaches introduction.
Rolls-Royce is targeting annual original-equipment revenue growth of 25% in power generation through to 2030. It has a separate target of 20% annual original-equipment growth in governmental applications within Power Systems.
These targets concern future revenue and should not be confused with the 62% increase in the division's order intake during the first nine months of 2026. Orders, deliveries and revenue recognition occur at different points in the commercial and manufacturing cycle.
Services also remain a substantial part of the Power Systems business, accounting for approximately 40% of its operating profit. The service activity supports generating equipment already installed with customers through maintenance, parts and other lifecycle requirements.
Operating hours, starting frequency, environmental conditions and the characteristics of the electrical load influence maintenance requirements. A generator regularly producing prime power may accumulate running hours at a different rate from equipment held primarily for emergencies.
As the installed equipment population expands, maintaining service capacity and component availability becomes an important requirement alongside manufacturing new units. The company expects double-digit service revenue growth within Power Systems.
At group level, Rolls-Royce maintained its guidance for underlying operating profit of £4.7 billion to £4.9 billion and free cash flow of £3.8 billion to £4.0 billion during 2026.
The company plans to revisit its medium-term targets when it publishes full-year results on 25 February 2027. Its £8.6 billion Power Systems backlog provides a substantial pipeline of future equipment and services work, while production expansion in the United States is intended to support the resulting delivery requirements.
