What Is LCOH? A Practical Hydrogen Cost Example
The levelized cost of hydrogen (LCOH) is the average cost of producing one kilogram of hydrogen over a plant's life, after accounting for capital, electricity, water, maintenance and the cost of money. It is the single most quoted number in hydrogen project development — and the most easily misused.
Why LCOH exists
A hydrogen plant spends money at very different times: electrolysers and civil works up front, electricity every hour for decades, stack replacements partway through. LCOH converts that uneven stream of costs into one comparable figure, the same way levelized cost of electricity (LCOE) does for power plants. It lets a developer compare two site options, two technologies, or two power strategies on equal terms.
The inputs that matter most
For renewable hydrogen, published analyses by the IEA and IRENA consistently show the same ranking of cost drivers:
- Electricity price and how many hours the plant runs. Power is usually the largest single cost. A plant running 4,000 full-load-equivalent hours on cheap solar and wind has a fundamentally different cost structure from one running 8,000 hours on grid power.
- Electrolyser capital cost and lifetime. Stack replacement timing and degradation assumptions move the answer more than most newcomers expect.
- Cost of capital. A project financed at 5% and one financed at 10% can differ by more than a dollar per kilogram.
- Water, compression and storage. Usually smaller, but site-specific — desalination and long water pipelines are not negligible everywhere.
A worked example, honestly labelled
Imagine a 10 MW electrolyser running about 4,400 full-load-equivalent hours per year, producing roughly 1,500 tonnes of hydrogen annually. With equipment and installation on the order of $1,000 per kW, a 25-year project life, a mid-single-digit discount rate, and blended electricity around $30 per MWh, a simplified levelized calculation lands in the region of $4–5 per kg. Change the electricity price to $60 per MWh and the answer moves by roughly $2 per kg — electricity at about 50 kWh per kg dominates.
These figures are illustrative, not a quote for any real project. Real projects add compression, storage, water treatment, grid fees, taxes and financing structure, and each can move the result materially.
What LCOH does not tell you
LCOH is a plant-gate production cost. It says nothing about what a buyer will pay, what delivery to that buyer costs, or whether the project can be financed. Comparing a plant-gate LCOH with a delivered ammonia price, or with a competitor's headline number built on different assumptions, is how bad decisions start.
How to use it properly
Treat LCOH as a screening tool: build it from stated assumptions, test which inputs move it most, and compare options on a like-for-like basis. H2Hub's workspace does exactly this — power, water and hydrogen costs are calculated together in one model, and every input shows its source, date and confidence level.
H2Hub produces preliminary project-development analysis. It is not a substitute for licensed engineering, FEED, due diligence or investment advice.