PEM hydrogen combustion enhancement vs HYDI.

Checkable, factual points only.

HYDI generates hydrogen on demand via electrolysis using distilled water, injected directly into the intake prior to combustion — no stored hydrogen (a genuine safety feature, since it only generates while the engine runs), and no chemicals or additives, “just pure water”. HydroHub systems use PEM electrolysis — also no caustic electrolyte, with a solid polymer membrane, reversible fitment and optional CAN/Modbus telemetry for fleet-management integration, which may suit multi-vehicle operators differently depending on their existing telematics setup.

A quote conversation, or a published price.

HYDI does publish a price signal: their applications page discloses an approximate starting price of around A$18,000 per unit. Beyond that starting figure, their site is built around a detailed ROI calculator that leads to a personalised-quote enquiry (name, email, phone, company and industry details). That is a considered, consultative sales approach from an established manufacturer, and a starting price is more than many suppliers in this category disclose. The difference here is granularity rather than secrecy: HydroHub publishes a firm price for every SKU in the range instead of a single entry point, so a buyer can compare purchase cost tier by tier before making contact.

Where each of us stands.

HYDI is a genuinely credible, long-established Australian competitor with real university-validated evidence and a strong field history — a serious option worth your consideration. Our differentiation is PEM-specific technology, a stricter single-attribution evidence discipline, published firm pricing and direct purchase — not a claim that our results are better than theirs.

No projected, typical or expected fuel-saving figure is published. Actual results vary materially with engine condition, duty cycle, load profile, fuel quality, installation and operating conditions. A controlled field evaluation on your own equipment, with baseline data captured before installation, is required before any commercial projection.

Questions.

How does HydroHub compare with HYDI?

Both generate hydrogen from water on demand and inject it ahead of combustion, with no stored hydrogen and no caustic electrolyte — that common ground is worth being upfront about. The genuine technical distinction is the electrolysis method itself (our PEM solid polymer membrane versus HYDI's own cell design) and engineering details such as response time, purity and monitoring approach: HYDI uses a Bluetooth app for individual-unit status, while HydroHub systems offer optional CAN/Modbus output built for fleet-wide management-system integration. Commercially, HYDI discloses an approximate A$18,000 starting price and then quotes individually via an ROI calculator; HydroHub publishes a firm price for every SKU in the range and sells directly.

Is HYDI's evidence credible?

Yes, and we say so plainly. Independent testing by the University of South Australia found a 5–13% reduction in diesel consumption, a 25–80% reduction in diesel particulate matter and a 7–25% reduction in carbon monoxide. HYDI also publishes real, named commercial customers — Hilands Gas & Coal Seam Cementing, Torrens Transit, Holcim and Titeline Drilling, where an 18% fuel-consumption reduction was reported on a CAT 3406 drilling rig — alongside an 11-year field history including a 50,000 km trial on the outback Strzelecki Track. That is legitimate, university-validated evidence and we are not going to pretend otherwise.

Then what is the difference in evidence?

How it is presented, rather than whether it exists. HYDI's site features several different headline percentages across different pages for different metrics and applications (for example 15% fuel savings, 17% CO2 reduction and 90% DPM reduction in different contexts). Our own site holds to a stricter single-attribution discipline — one cited figure per claim, tied directly to its source, without repeating different numbers as recurring marketing banners. Both are legitimate approaches to presenting real evidence; ours is simply built to be as conservative and individually verifiable as possible. We have not yet commissioned independent university-level testing of our own: HYDI has earned that trust marker over more than a decade and we are not there yet.

What is HYDI's purchase path?

HYDI discloses an approximate starting price of around A$18,000 per unit on their applications page, with specific quotes generated through their ROI calculator and enquiry process. That is a considered, consultative approach from an established manufacturer. HydroHub instead publishes a firm price for every SKU in the standard range — US$1,975 for the A-450 through to $5,490 for the H-Power and $6,050 for the DH-Power — with direct checkout, so purchase cost can be compared tier by tier before any contact.

Which should a fleet buy?

That depends on your duty cycle, your telematics setup and how much weight you place on a decade of Australian field history versus published firm pricing and immediate single-unit purchase. HYDI is a genuinely credible, long-established Australian competitor and a serious option worth your consideration. Our differentiation is PEM-specific technology, a stricter single-attribution evidence discipline, published firm pricing and direct purchase — not a claim that our results are better than theirs. Field evaluation on your own equipment remains the only valid basis for the decision.