DEEP RESEARCH · Iljin Hysolus

Iljin Hysolus: Type 4 Hydrogen Tanks and the Nexo 2 Turnaround

A report on the hydrogen-mobility chasm, tube trailers, balance-sheet resilience, and EV/Sales re-rating

Written: 2026-03-02 · Hydrogen mobility/valuation · Naver Blog original

0. Bottom line first

1. Business structure and Type 4 moat

Official fact: Iljin Hysolus makes high-pressure gas vessels and diesel particulate filters. The hydrogen business is the core future-value driver, producing 700-bar high-pressure hydrogen fuel tanks for FCEVs and 450-bar hydrogen tube trailers for refueling stations and bulk transport.

The weakness is high dependence on Hyundai Motor's Nexo. But I also read that dependency as proof of a hard-to-replicate production reference: Iljin has passed Hyundai's quality standards from Tucson ix35 to Nexo.

Official fact: The source says Type 4 reduces weight by more than 60% versus steel tanks while increasing physical strength by more than 10x. In fire or collision scenarios, the vessel is designed to release gas through a self-venting system rather than fragment like a steel tank.

Official fact: The source says only a small group can mass-produce Type 4 hydrogen tanks and deliver reliably to automakers: Iljin Hysolus, Norway's Hexagon Purus, and Toyota in Japan. Its global Type IV hydrogen cylinder share is estimated by research providers at roughly 5.8% to as high as 16.3%.

2. Value chain and downstream market: from passenger cars to heavy duty

Official fact: Hyundai Motor dependence is described as above 60-70%. That weakens Iljin's pricing power, but Hyundai also lacks an immediate domestic replacement with comparable defect control and mass-production capability.

Official fact: The key upstream raw material is high-tensile PAN-based carbon fiber, a market concentrated among a few global chemical companies such as Toray in Japan and Hyosung Advanced Materials in Korea. Demand from wind and aerospace creates raw-material price stickiness.

Interpretation: Long-term margin defense depends on 1) higher-priced, higher-margin multi-tank modules for hydrogen buses and heavy trucks and 2) B2B tube-trailer customers that reduce dependence on automaker cost-reduction pressure.

The hydrogen-mobility focus is also shifting from passenger cars to heavy-duty commercial vehicles. Battery-electric buses and heavy trucks face heavy batteries, payload loss, and long charging time. Hydrogen commercial vehicles can maintain logistics efficiency with lightweight carbon-fiber tanks, long range, and roughly 15-20 minute refueling.

Official fact: The source forecasts the global hydrogen storage tank market growing from about $400 million in 2025 to about $13.1 billion in 2035, a 41.2% CAGR. Korean policy targets include 300,000 hydrogen vehicles and 660 cumulative hydrogen stations by 2030, 11,000 hydrogen passenger cars in the 2025 subsidy budget, up to KRW 200 million in purchase financing/subsidies for hydrogen buses, hydrogen fuel subsidies of about KRW 3,500/kg for commercial hydrogen trucks and taxis, and Danyang County's 2026 hydrogen passenger-car subsidy of KRW 33.5 million per vehicle.

3. Tube trailers and the Q/P/C earnings turn

Official fact: Legacy Type 1 steel tube trailers carried 300kg of hydrogen, weighed about 40 tons, and were 16m long. Iljin's 450-bar Type 4 tube trailer cuts vehicle weight to 26 tons, down more than 35%, lifts payload to 500kg, up about 66%, and shortens length to 10m.

Official fact: The November 2024 supply contract with Lotte Air Liquide Enerhy for 450-bar hydrogen tube trailers is presented as evidence that next-generation infrastructure equipment demand is moving into actual B2B revenue. The source also cites a white-hydrogen market forecast of about $8.8 billion by 2033.

The source includes a separate assisted-content link at this point: http://googleusercontent.com/assisted_ui_content/3

Q: volume

• The 2024-2025 weakness came mainly from Nexo 1 aging and volume evaporation.
• Hyundai's Nexo sales in Q2 2024 are cited as down 82% YoY to only 160 units.
• The next-generation Nexo is described with 190kW system output, 6.69kg hydrogen storage, and WLTP range of 826km.
• The source cites provisional first-month sales of 1,001 units in July ahead of a Q3 2025 launch, the 2025 subsidy budget for 11,000 hydrogen passenger cars, and about 1,300 hydrogen buses in government plans.

P: price and mix

Iljin cannot easily raise Nexo tank prices on its own. The upside comes from mix: passenger cars typically carry three tanks, large hydrogen buses carry 5-7 large tanks as a module, and tube trailers use about 40 Type 4 cylinders in one transport unit.

C: cost and utilization

Official fact: 2025 revenue was KRW 81.58 billion, up 2.9% from KRW 79.29 billion in 2024, but operating loss widened 17.8% to KRW 11.21 billion from KRW 9.51 billion. The source attributes this to fixed costs from the 2022 R&D center, internal safety-certification systems, and prebuilt commercial-vehicle capacity under low utilization.

Interpretation: In high-fixed-cost manufacturing, passing BEP can convert incremental revenue into profit. The source sees visibility for revenue above KRW 120 billion in 2026, above an estimated BEP in the low KRW 100 billion range, with annual operating profit around KRW 5 billion.

4. Balance-sheet strength and capital allocation

Official fact: 2025 total assets are cited at about KRW 347.9 billion, liabilities at KRW 26.8 billion, equity at KRW 315.0 billion, and paid-in capital at KRW 18.1 billion. Capital impairment is described as not applicable, or 0%, and the debt ratio is calculated at about 8.5%. Financing cash inflow in 2025 was about KRW 340 million, with no additional share issuance or toxic debt beyond government subsidies.

Official fact: As a peer comparison, the source says Hexagon Purus recorded a Q4 2025 EBITDA loss of NOK 104 million, full-year revenue of NOK 1.144 billion, and EBITDA of -NOK 618 million. It also sold its North American aerospace business to SpaceX for $15 million and renegotiated away a $12.9 million advance-payment obligation under a battery-cell supply agreement.

Interpretation: In the hydrogen value-chain chasm, financial endurance is not optional. Iljin's near debt-free net-cash position is a shield that may let it absorb market share as weaker competitors restructure.

5. Valuation, catalysts, and risks

The source argues that EV/Sales is more relevant than PER or PBR during the loss-making chasm. Hexagon Purus trades in a roughly 0.4-2.3x EV/Sales band, while OPmobility's H2-Power unit has a 2030 revenue target of EUR 3 billion but is growing gradually because commercial-vehicle adoption is delayed.

Official fact: Iljin Hysolus once traded above 7x EV/Sales during peak hydrogen-economy enthusiasm. The source applies a conservative 12-month-forward EV/Sales target multiple of about 4.5x to estimated 2026 turnaround revenue and interprets the current KRW 11,000-14,000 share-price range as materially undervalued.

Official fact: The source lists critical risks: Hyundai changing its hydrogen passenger-car and mobility strategy, indefinite delay of Nexo 2 mass production, faster commercialization of solid-state batteries, delayed charging infrastructure, possible cuts to clean-energy subsidies in major countries such as the United States, and tariff risk on hydrogen components such as composite pressure vessels and carbon fiber. Domestic hydrogen stations totaled 274 at end-2023, still far from the 660 target for 2030.

The source's investment stance is explicit and aggressive: Strong Buy and portfolio weight increase; accumulate at KRW 11,500-14,000; realize about 30% profit around KRW 16,000-18,000; hold the remainder toward KRW 28,000-31,000 if a full 2026 H2-2027 H1 turnaround and 4.5x EV/Sales multiple materialize; and recheck or stop out below KRW 11,000 if the fundamental risk case appears. I record this as the author's research scenario, not a recommendation.