Engine exhaust recovery: Economics and contracts

First-year payback claims, and who really profits

What this tab covers Economics and commercial structures: levelised cost of the recovered energy against the fuel it avoids, host-site risk, and service models such as heat-as-a-service.

Turbocharging is a sunk standard cost; turbo-compounding claims fast payback on long-haul trucks but some engine makers judge it not worth the complexity.

Levelised cost of heat or avoided cost

Mixed

The value is avoided fuel. Volvo says fleets recoup the cost of turbo-compounding within the first year of operation, based on its 7.5% fuel efficiency gain; Mack quotes up to 9.5% when combined with aerodynamic features. Neither article gives the purchase price, so payback cannot be checked independently. For engine plants, the Flexicycle upgrade is sold on extra output with no extra fuel.¹⁵

Volvo payback claim within first year¹ Mack fuel gain with aerodynamic package up to 9.5%¹

Host factory credit risk

Mixed

There is no separate host: the recovery device belongs to the vehicle or engine plant. The relevant risk is that the asset class itself shrinks. Long-haul diesel trucks face electrification and hydrogen; diesel and gas engine plants face competition from batteries and renewables. A turbo-compound unit has no resale value outside its engine.¹

Heat-as-a-service and ESCO models

Mixed

ESCO models are rare here; value is captured by engine and turbocharger makers through service. Accelleron, which reports itself as market leader in high-power turbocharging, had more than 190,000 turbochargers in its installed base, revenue of USD 1,263.1 million in 2025 (up 23.5%) at an operational EBITA margin of 25.4%, and signed about USD 150 million of service agreements that year (company-reported). More than 40% of its revenue now comes from the energy sector (gensets and power plants) rather than ships. Everllence (formerly MAN Energy Solutions), a major maker of large engines and turbomachinery with about EUR 5 billion revenue and more than 140 service locations, agreed in June 2026 that Volkswagen would sell a majority stake to Bain Capital, subject to regulatory approval. Both show investors pay for aftermarket income on a large installed base.¹¹⁹

Accelleron installed base more than 190,000 turbochargers¹¹ Accelleron 2025 revenue USD 1,263.1 million, up 23.5%¹¹ Operational EBITA margin 25.4%¹¹ Everllence revenue about EUR 5 billion⁹

Sources

OEMs mixed on turbo compounding Transport Topics, 2018
Wartsila Flexicycle upgrade (service catalogue, company claim) Wartsila, 2025
Bain Capital acquires Everllence, globally leading engine and turbomachinery manufacturer Bain Capital (press release), 2026
Annual Report 2025 (company-reported figures and claims) Accelleron Industries, 2026