Gothenburg, April 2026 — Volvo Trucks has begun road-testing trucks powered by hydrogen combustion engines using High Pressure Direct Injection (HPDI) technology, targeting commercial launch around 2030. The HPDI approach burns hydrogen in a modified diesel-cycle engine at diesel-like efficiency — a fundamentally different zero-CO₂ path from both battery-electric and fuel-cell trucks.

How to read this as a fleet planner. Not as a reason to wait. Volvo’s own timeline puts hydrogen combustion at 2030 — the same year the EU’s −45% CO₂ target forces mass electrification regardless. Every credible scenario for this decade’s transition is battery-electric for the duty cycles that fit today, with hydrogen (combustion or fuel-cell) contesting the residual long-haul and high-payload niches later. What the test programme does confirm is technology pluralism at the top of the industry: Volvo is simultaneously shipping the FH Aero Electric, co-funding Milence’s megawatt charging, and road-testing hydrogen — hedging, not choosing. Fleets should hedge the same way: electrify what closes on TCO now, keep long-haul options open, and never bet the fleet on a single propulsion future.

The parallel signal. The same month saw hydrogen activity elsewhere (Hyundai Xcient Fuel Cell trucks in timber logistics in Uruguay, Daimler’s eCitaro fuel-cell bus) — a reminder that the “electric vs hydrogen” debate will be settled by duty-cycle economics and hydrogen price, not by ideology. We cover the propulsion question strictly through the TCO lens; when a hydrogen truck posts verifiable €/km against a diesel benchmark on a European corridor, it will get the same WattTonne Score treatment as the 24 models in our current ranking.