What is LCOH?
LCOH (Levelized Cost of Hydrogen) is the average cost of producing one kilogram of hydrogen over the economic lifetime of a production facility, accounting for all capital and operating costs, adjusted for time and efficiency losses.
Mathematically, it is the hydrogen price [$/kg or ₹/kg] that equates the Net Present Value (NPV) of costs and revenues across the project life.
In simpler terms:
LCOH = (Total discounted lifetime cost – Lifetime subsidies + Revenues from co-products) / Total hydrogen produced over the same period
It is the green hydrogen industry’s equivalent of LCOE in electricity.
How Is LCOH Calculated?
The most widely used format is:
LCOH = (CAPEX amortized over life + Electricity cost + Other OPEX + Grid Fees + Electricity Taxes − Subsidies − Oxygen Revenue) / Total hydrogen output
Key Components of LCOH
CAPEX (Capital Expenditure)
Covers all upfront costs to build the electrolyser unit: equipment, installation, civil, electrical, mechanical, land, permitting, etc.
Excludes: Costs related to RES (solar/wind) and downstream processing or transport.
Usually expressed in $/kW installed.
Example: A 20 MW PEM electrolyser with a capital cost of $975/kW has a total CAPEX of approximately $19.5 million.
Electricity Cost
Most significant cost driver (up to 70–80% of LCOH).
Depends on electricity source (grid, solar, wind, hybrid), average cost ($/MWh), and electrolyser efficiency (kWh/kg H₂).
Formula: Cost of Energy = Energy consumption (MWh) × Avg. electricity price ($/MWh)
Grid Fees & Electricity Taxes
Grid Fees: Charges for using transmission/distribution infrastructure (included when connected to wholesale markets).
Taxes: Renewable surcharge, capacity fees, nuclear/environmental levies—vary by country.
Waived when direct-coupled to RES (e.g., off-grid solar/wind).
Other OPEX (Operational Expenditure)
Includes maintenance, stack replacements (as % of CAPEX), water treatment, insurance, and labor.
Stack degradation increases electricity needs and incurs periodic replacement cost (based on durability, typically every 60,000–90,000 hours).
Formula: Total OPEX = (Fixed % of CAPEX per year × Project lifetime) + Stack replacement cost
Subsidies & Incentives
CAPEX Grants (€/kW)
Feed-in tariffs or green premiums ($/kg H₂ sold)
Grid/tax exemptions ($/MWh)
Subsidies reduce LCOH and are often project-specific.
Oxygen Sales
Oxygen is a valuable co-product of electrolysis.
For every 2 Nm³/hr of hydrogen, approximately 1 Nm³/hr of oxygen is produced.
Revenue = Oxygen output × price ($/t)
While oxygen sales are optional in LCOH calculations, they are typically included when sold to nearby industries (e.g., medical, metal processing).
Supporting Calculations
Electrolyser Output
Hydrogen Output (kg) = Installed Power (kW) / Specific energy (kWh/kg)
× Operating hours (h/year) × Lifetime (years)
Energy Consumption
Due to degradation, energy use increases over time. The LCOH calculator uses a time-weighted average:
Avg. Energy Consumption (kWh/kg) = Initial consumption adjusted for degradation × number of replacements
What Affects LCOH Most?
Electricity Price: Lower RE costs and higher electrolyser utilization = lower LCOH.
Efficiency: More efficient stacks reduce energy/kg H₂.
Operating Hours: Higher uptime spreads CAPEX and OPEX over more output.
Stack Durability: Longer-lasting stacks mean fewer replacements and lower OPEX.
Policy Support: Subsidies and waived grid/tax charges can reduce LCOH significantly.
Use of LCOH
Industry Buyers: Benchmarks costs vs. grey or blue H₂.
Developers: Helps optimize design and financials.
Investors: Enables risk-adjusted return comparisons.
Governments: Supports policy and tender design.
Conclusion
LCOH is not static. It is shaped by market forces, technology evolution, plant location, utilization, and financing. While the math is straightforward, the real challenge lies in choosing realistic, location-specific, and technology-specific input values. Getting LCOH right can make or break your hydrogen business case.