The cheapest hydrogen is green

The cheapest hydrogen is green

Our centrifugal, bubble-free electrolyzer runs at 95% efficiency (HHV) and brings green hydrogen below fossil cost.

Our centrifugal, bubble-free electrolyzer runs at 95% efficiency (HHV) and brings green hydrogen below fossil cost.

€215B a year industry

Hydrogen already runs the modern world

Oil refining burns through 43Mt of hydrogen every year. Fertilizers, plastics, and steel add another 55Mt. And that's before counting hydrogen as a fuel, transport, heating, and power.

Less than 1% is fossil-free

Regulation alone won't close the gap

Green hydrogen still costs more than fossil hydrogen. Mandates and subsidies help but only cost parity makes decarbonization self-sustaining.

A new kind of electrolyzer

We redesigned electrolysis from first principles. The result is a centrifugal bubble-free alkaline electrolyzer. Higher efficiency, lower CAPEX, and longer life.

Bubble-free electrolysis

95% efficiency (HHV)

Gases escape through hydrophobic porous electrodes, eliminating the efficiency losses bubbles cause.

Centrifugal design

Up to 3 A/cm²

Rotation circulates the electrolyte and carries heat away, with no external equipment.

Bipolar plateless stack

Lowest CAPEX in class

A flipped-electrode architecture removes bipolar plates — typically 15–25% of stack cost.

Electrode repair

>30-year lifetime

In-situ catalyst redeposition rebuilds the active surface, extending stack life.

Levelized cost of hydrogen (LCOH)

1.92/kg

vs 3.41/kg gray hydrogen (SMR)

1.92/kg
Spiral Hydrogen
Off-grid renewables
3.41/kg
Gray H₂
Steam methane reforming
  • CAPEX
  • Electricity (Spiral)
  • Natural gas (SMR)
  • Carbon (ETS, SMR)
  • OPEX
28 €/MWh
4,500 h/yr
80 €/t CO₂
How we calculated this

Spiral Hydrogen (off-grid)

Plant scale20 MW
CAPEX€800/kW
Energy consumption41.74 kWh/kg (≈94% HHV efficiency)
Stack durability180,000 h (0 replacements at default 3,500 h/yr × 25 yr)
Operating life · WACC25 yr · 6%
O&M2%of CAPEX/yr

Gray hydrogen (SMR)

Plant scale20 MW
CAPEX€700/kW
NG consumption50 kWh/kg H₂
NG price€40/MWh
CO₂ intensity9.5 kg CO₂/kg H₂ (chemical + combustion)
Reformer overhaul30% of CAPEX every 120,000 h (1 over project life)
Operating hours · Life · WACC8,000 h/yr · 25 yr · 8%
O&M4%of CAPEX/yr

Method

Levelized via standard LCOH: capital recovery factor × CAPEX, plus lifetime fuel and O&M, divided by lifetime hydrogen production. Carbon cost = CO₂ intensity × ETS price.

Run the full advanced calculator

LCOH cost components in €/kg of H₂
ComponentSpiralGray H₂ (SMR)
CAPEX0.590.41
Electricity / NG1.182.01
Carbon (ETS)€0.000.76
OPEX0.150.23
Total1.923.41
Levelized cost of hydrogen (LCOH)

1.92/kg

vs 3.41/kg gray hydrogen (SMR)

1.92/kg
Spiral Hydrogen
Off-grid renewables
3.41/kg
Gray H₂
Steam methane reforming
  • CAPEX
  • Electricity (Spiral)
  • Natural gas (SMR)
  • Carbon (ETS, SMR)
  • OPEX
28 €/MWh
4,500 h/yr
80 €/t CO₂
How we calculated this

Spiral Hydrogen (off-grid)

Plant scale20 MW
CAPEX€800/kW
Energy consumption41.74 kWh/kg (≈94% HHV efficiency)
Stack durability180,000 h (0 replacements at default 3,500 h/yr × 25 yr)
Operating life · WACC25 yr · 6%
O&M2%of CAPEX/yr

Gray hydrogen (SMR)

Plant scale20 MW
CAPEX€700/kW
NG consumption50 kWh/kg H₂
NG price€40/MWh
CO₂ intensity9.5 kg CO₂/kg H₂ (chemical + combustion)
Reformer overhaul30% of CAPEX every 120,000 h (1 over project life)
Operating hours · Life · WACC8,000 h/yr · 25 yr · 8%
O&M4%of CAPEX/yr

Method

Levelized via standard LCOH: capital recovery factor × CAPEX, plus lifetime fuel and O&M, divided by lifetime hydrogen production. Carbon cost = CO₂ intensity × ETS price.

Run the full advanced calculator

LCOH cost components in €/kg of H₂
ComponentSpiralGray H₂ (SMR)
CAPEX0.590.41
Electricity / NG1.182.01
Carbon (ETS)€0.000.76
OPEX0.150.23
Total1.923.41

Let's talk

Whether you're looking to partner, invest, join, or just ask a question — we'd like to hear from you.

Juri Volodin

CEO and Founder

Let's talk

Whether you're looking to partner, invest, join, or just ask a question — we'd like to hear from you.

Juri Volodin

CEO and Founder

Let's talk

Whether you're looking to partner, invest, join, or just ask a question — we'd like to hear from you.

Juri Volodin

CEO and Founder

Spiral Hydrogen OÜ

Registration number: 16896381

VAT number: EE102792151

Delft, Netherlands

© 2026 Spiral Hydrogen OÜ · Web by Lumela

Spiral Hydrogen OÜ

Registration number: 16896381

VAT number: EE102792151

Delft, Netherlands

© 2026 Spiral Hydrogen OÜ · Web by Lumela

Spiral Hydrogen OÜ

Registration number: 16896381

VAT number: EE102792151

Delft, Netherlands

© 2026 Spiral Hydrogen OÜ · Web by Lumela