Learn · Fleet reference
Hydrogen Injection for Fleets
Fleet deployment is a measurement problem before it is a hardware problem. This page sets out how to size, install, trial and scale hydrogen injection across a mixed fleet.
Sizing by displacement
| Engine displacement | System | Output |
|---|---|---|
| 1.0 – 1.8 L | A-450 | 450 ml/min |
| 2.0 – 2.5 L | A-675 | 675 ml/min |
| 2.7 – 7.0 L | A-900 | 900 ml/min |
| Up to 7.0 L, continuous duty | H-Power | 900 ml/min |
| Up to 16.0 L | DH-Power | 1,800 ml/min |
Standardize the installation
- One mounting pattern per vehicle class, documented with photographs
- Switched DC feed through inline fuse and relay on every unit
- Injection point downstream of the MAF sensor, identical per platform
- Purified water only; resin filter change logged on the service schedule
Trial design
Run a matched-pair trial: equal numbers of fitted and unfitted vehicles on the same routes, drivers rotated. Baseline for at least 60 days before fitment. Compare like duty cycles, not like calendar periods.
Rollout economics
Payback is a function of annual fuel spend per vehicle, not of vehicle count. High-consumption, high-load, high-annual-mileage assets pay back first. Light-duty, low-mileage vehicles rarely justify hardware on fuel savings alone.
FAQ
Questions.
How many vehicles should be in a trial?
- Enough to average out driver and route variance — typically six to ten fitted units with a matched control group, over a full quarter.
Do you supply installation?
- Supply is hardware only. Installation is performed by your own qualified technician following the installation guide.
More in the knowledge hub
- How PEM Hydrogen Injection Works →
- Does Hydrogen Injection Actually Work? →
- PEM vs Alkaline Electrolysis for Engine Retrofits →
- Types of Hydrogen Technology for Engines →
- Hydrogen Injection Supplier Comparison →
- Engine Performance and Hydrogen Enrichment →
- Emissions and Hydrogen Enrichment →
- Fuel Efficiency and Hydrogen Enrichment →
- Shop the HydroHub™ range →
- Compare all systems →
- Fuel savings calculator →
- Fleet evaluation programme →