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The MGU-K will be at the heart of the F1 2026 project. The FIA has introduced a slew of changes for the new regulations, including a complete overhaul of the power unit. With the elimination of the MGU-H, all hybrid workload now falls on the kinetic energy generator. This gives rise to a brand-new charging mode, which, at least for now, seems difficult to fully control. Let’s explore why.
The role of the MGU-K in the 2026 technical regulations
With the arrival of the 2026 technical regulations, Formula 1 power units will finally bid farewell to the MGU-H, the generator that in previous hybrid turbo units used exhaust gas enthalpy to recover energy. This was an extremely sophisticated technology, difficult to transfer to road cars, and has been considered a dead end from an industrial standpoint.
The MGU-H provided an almost continuous flow of energy, modulated only by engine speed. Through exhaust gases, energy recovery occurred constantly across the lap. Its removal will inevitably make the battery charging process in next-generation F1 cars more complex, especially when observed on a single-lap scale.
This challenge has been well known for years, and F1 teams have been preparing for it. Nikolas Tombazis, former Ferrari team principal and now a key FIA figure, confirmed that energy management will become more delicate. He also emphasized that 2026 cars cannot afford to fully deplete their batteries from start to finish of a race.
The team that masters designing a system capable not only of recovering energy efficiently but also storing and deploying it optimally will have a clear advantage. Mercedes has long been seen as the frontrunner, with a potential power unit that could impress, but Ferrari is promising as well. The value of the hybrid package will not be measured solely in horsepower but in the quality of its deployment.
Energy management will therefore require balanced laps, where the energy recovered roughly equals the energy spent, or at most slightly differs. This is essential to maintain consistent performance and provide drivers with predictable power. In this context, overall power unit efficiency will become a decisive factor.
MGU-K: how the new 2026 power unit charging mode works
Alongside the raw performance of the next-generation V6 turbos, energy recovery strategies across the lap will play a critical role in the competitive campaign. With hybrid energy capped at 50%, teams will have more electric power at key track points, optimizing overall performance.
The MGU-K will obviously be the central element of this recovery system, and the FIA has emphasized its importance. However, a major innovation will fundamentally change its use: a new charging mode will be introduced, where energy recovery will not be limited solely to braking phases before corners.
According to the FIA engineer and former Ferrari team principal, even the car’s cornering phase can contribute to battery charging, provided the internal combustion engine (ICE) is operating at sufficiently high RPM—a mandatory condition. Similarly, under certain conditions, the ICE can transfer energy directly to the electric component.
The principle is clear: the MGU-K, being directly connected to the crankshaft, can operate even when the ICE produces more power than strictly necessary. In these cases, teams can program specific maps to allow a form of controlled “overdrive,” using excess energy to power the hybrid system.
Power unit layout, fuel consumption, and open questions
The MGU-K can also function as a form of controlled resistance on the crankshaft, recovering energy in situations similar to engine braking, such as throttle release. The effectiveness of this mechanism will vary depending on the power unit layout, making the overall design highly sensitive to architectural choices.
Another important implication is increased fuel consumption. This phenomenon was already partially present in previous power units, which powered ground-effect cars. It was largely mitigated by the MGU-H, which from 2026 will no longer contribute significantly to energy needs.
Looking ahead, many questions remain. This is why energy recovery and its deployment—when and how the MGU-K’s accumulated electric power will be used during a lap—will be central to technical discussions. It is a topic that will generate ongoing analysis and debate, as it will have a substantial impact on overall car performance.
Dec 27, 2025
