How electricity prices change green hydrogen cost

Convert the power price into a cost per kilogram

Multiply the price of electricity by the electricity consumed to produce one kilogram of hydrogen. If the price is quoted per megawatt-hour, divide by 1,000 to match a consumption figure quoted in kilowatt-hours. The units cancel to give a cost per kilogram.

For a constant electricity price and constant specific consumption, this is a direct operating-cost calculation. It does not annualize the electrolyser investment or model financing, degradation, replacement schedules or changes in annual production.

Electricity cost (USD/kg H₂) = electricity price (USD/MWh) × system electricity use (kWh/kg H₂) ÷ 1,000

H2Prism calculation. The prices and consumption levels are examples for comparison. These cells contain electricity cost only.

A 20 USD/MWh power-price difference

Assume two otherwise identical plants consume 55 kWh for each kilogram of hydrogen. Plant A pays 40 USD/MWh and Plant B pays 60 USD/MWh. Their electricity costs are 2.20 and 3.30 USD/kg H₂. The difference is 1.10 USD/kg H₂ before any change in other costs.

At an assumed constant output of 10,000,000 kg/year, that difference is USD 11M per year. This annual arithmetic holds output fixed. A real supply arrangement may change available operating hours, connection charges and the mix of purchased and self-generated power. Compare those effects together before choosing a supply option.

Est. annual electricity-cost difference = 20 × 55 ÷ 1,000 × 10,000,000 = USD 11M

Use a system consumption figure that matches your plant

A stack consumption figure can exclude equipment that the plant still has to power. Check whether the stated kWh/kg includes the rectifier, water treatment, cooling, drying and other auxiliary equipment. Also check the hydrogen outlet pressure. Add compression or storage loads once, where they belong in your chosen boundary.

DOE's 2024 PEM cost study assumes 55.2 kWh/kg at the beginning of stack life and 57.5 kWh/kg averaged over stack life, including balance-of-plant electricity. These are inputs to that study's production-cost model. The round 55 kWh/kg used in this guide is an illustrative assumption; it is not the study's lifetime-average value. Use project or supplier documentation for your own operating case.

Cheap power and high utilization need to be assessed together

With a flat power price and unchanged kWh/kg, reducing operating hours leaves the electricity cost of each kilogram unchanged. It reduces annual production. Capital and fixed operating costs then have fewer kilograms over which to be recovered.

A renewable supply with a lower headline price can therefore produce a higher full cost if it supports much less electrolyser operation. Conversely, paying more for additional operating hours may reduce fixed cost per kilogram while increasing the power bill. An hourly supply and dispatch model is needed to resolve a variable generation profile; a single annual capacity factor is a screening input.

Keep electricity cost, LCOH and selling price separate

Electricity cost is one contribution. Levelized cost of hydrogen (LCOH) spreads defined project costs over defined hydrogen output across an operating life, using a stated discounting method. The H2A production methodology provides a documented framework for setting that boundary and reporting its assumptions.

A delivered selling price may also need to recover conditioning, storage, transport, taxes and contractual risk. Compare two quoted costs only after aligning the product, delivery point, currency, price year and treatment of grants or credits. A low modeled production cost by itself does not establish a customer price or a project's return.

Carry the assumptions into the hydrogen calculator

Start with a PEM or alkaline pathway in the Hydrogen Price Calculator. Set installed capacity and capacity factor, then enter the system electricity use and power price using the unit printed beside each input. For example, 40 USD/MWh equals 0.04 USD/kWh. Do not paste 40 into a field labeled USD/kWh.

Set the installed capital cost, operating life and financing assumptions to the same project basis. Compare the electricity contribution with the full result, then change the power price while holding other inputs fixed. Use a separate saved case when the power supply also changes utilization or installed equipment. The examples in this guide are independent arithmetic and are not a claim about the calculator's default result.

Compare three ready-to-import example cases

Download the power-price starter cases below, open the Hydrogen Price Calculator and choose Import cases. The file adds three clearly named guide examples at 40, 60 and 80 USD/MWh, entered as 0.04, 0.06 and 0.08 USD/kWh. In Compare, set the imported 40 USD/MWh case as Reference case, select the 60 USD/MWh case, then deselect any other cases. Their full modeled costs differ by 1.10 USD/kg H₂, entirely from the electricity price change. Inspect electricity alone in each case's cost composition.

The exercise assumes 100 MW electrical input, 50% capacity factor and 55 kWh/kg, with zero degradation, hydrogen loss and replacement cost to keep the arithmetic constant. The annual output is about 7,964 tonnes in every case. Installed CAPEX, fixed OPEX and water are also included in the full modeled cost. Read the accompanying assumptions before using the cases; these are illustrative inputs, not supplier quotes or operating-plant records.

The file also contains an arbitrary hydrogen sales price of 5 USD/kg. Even with Finance Off, the calculator displays pre-tax NPV, IRR and payback based on that placeholder. Those figures are not project findings. This exercise compares production cost; replace the sales-price assumption before assessing a return.

Duplicate one guide case before changing it to your own power offer. Review operating hours and fees as well as the headline price. Your saved case can be reopened on the same device when the offer changes. Importing the exercise adds cases to the workspace; an import that would exceed the calculator's case limit is rejected. Re-importing adds copies.

Continue your analysis

• Download three power-price example cases (JSON)

  Import into the calculator and compare 40, 60 and 80 USD/MWh with all other assumptions held constant.

• Read the exercise assumptions and import steps (text)

  Review the illustrative assumptions, unit checks and a follow-up exercise before using the cases.

• Calculate a full hydrogen cost case

  Enter your plant, power and financial assumptions.

• Convert electrolyser MW into hydrogen production

  Check annual output and the meaning of capacity factor.

• Explore hydrogen projects

  Connect your screening assumptions with project context.