The 2026 revolution has made hybrid management more central to driving than ever before. In response, McLaren has introduced a dual display system on the steering wheel: one indicator shows battery charge, while the other shows the status of the MGU‑K, signaling deployment, regeneration, and derating. This is a crucial aid for drivers during the most delicate phases of a lap.
There’s no denying that the 2026 revolution has divided the paddock, particularly regarding the new Power Units, which have significantly altered driving styles. While the chassis changes have generally been welcomed—lighter, more compact, and easier-to-handle cars—the management of electrical energy has become a central focus in driving dynamics.
Tests in Bahrain revealed that manufacturers have adopted different strategies for battery management and regeneration, often linked to gear selection in various corners. From this context emerges a particularly revealing detail: how teams indicate to drivers whether the hybrid system is recovering or delivering energy, a factor that carries decisive weight in the new technical cycle.
Since the hybrid revolution of 2014, teams have included a dedicated steering wheel display to show remaining battery energy. This reference has always been crucial, especially during qualifying laps or wheel-to-wheel duels, when knowing the battery’s charge can make the difference between attacking or defending.
The key difference is that, until last year, the charging phase was much less noticeable: the MGU‑H contributed significantly to energy recovery, while the MGU‑K was smaller and its energy output was limited. Today, with an MGU‑K that is nearly three times more powerful and a much more pronounced deployment, the absence of the MGU‑H makes regeneration far more perceptible while driving.
This was evident in Bahrain: the hybrid began charging even in mid-corner or at the end of straights just before braking zones. In some corners, only the internal combustion engine was “pushing” to conserve energy for upcoming straights. While drivers prepare in the simulator, having an additional real-time reference is invaluable.
McLaren steering wheel features a dedicated MGU-K indicator
On this front, McLaren has adopted an even more detailed approach, standing out from other teams. Most teams retain the battery indicator on the wheel—often a colored bar—that visually shows, not just numerically, how much energy is available, offering an immediate reference.
For McLaren, this system has been expanded. In addition to the traditional bar on the right of the display showing battery charge, the MCL40 steering wheel includes a second indicator above the gear display, showing Lando Norris and Oscar Piastri how the MGU‑K is operating.
If the bar extends from the center to the right, the MGU‑K is active and delivering energy to the system. Conversely, when the bar moves from the center to the left—typically during braking, slow corners, or at the end of straights—the MGU‑K is in regeneration mode, recovering energy from the brakes or internal combustion engine.
The indicator is not binary; it also shows progressively when the MGU‑K enters derating mode, gradually reducing energy deployment before stopping completely or switching to charging mode.
There are moments when the MGU‑K is not active in deployment, for example on full-throttle straights or corners like turn 12 in Bahrain, where the ECU prefers to conserve energy for the next two straights. In these cases, with the motor generator inactive, the McLaren wheel bar disappears, signaling to the driver that only the internal combustion engine is providing power.
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