Power-to-X: a guide for businesses
Direct answer
Power-to-X is the conversion of (renewable) electricity into another energy carrier or feedstock, where the X stands for the destination. Think of power-to-gas or power-to-hydrogen, power-to-heat, and power-to-fuel or power-to-chemicals. In the Dutch context it links the power sector to sectors that are hard to electrify directly, and it lets you use surplus solar and wind.
- Clear definition
- Data-driven assessment
- Risks and opportunities visible
- Practical next steps
Power-to-X: scattered information versus Energy Intelligence
Solar and wind do not deliver evenly. During sunny, windy hours there is sometimes more power than the grid or demand can absorb, while at other times there is too little. At the same time, some sectors cannot easily run on electricity, such as heavy industry, shipping and aviation. In the Netherlands, power-to-X is the umbrella term for the techniques that convert electricity into another carrier, so you can store, move or use that energy where direct electricity falls short.
- The X stands for the destination of the electricity: among others gas or hydrogen, heat, fuels and chemicals.
- Power-to-X makes it possible to retain surplus solar and wind, and to decarbonise sectors you cannot run directly on electricity.
- Every conversion costs energy and loses efficiency, so direct electrification remains more efficient where possible.
Insight
Traditional approach
Information is scattered across portals, documents, invoices or separate spreadsheets.
Modern approach
Data, context and interpretation are brought together into a clear decision picture.
Decision-making
Traditional approach
Choices are made based on averages, assumptions or occasional analyses.
Modern approach
Scenarios, KPIs and current measurement data make the trade-off more concrete and repeatable.
Follow-up
Traditional approach
Actions often stay non-committal or disappear into separate reports.
Modern approach
Follow-up actions, monitoring and reporting are linked to the same energy data.
How does power-to-X work?
With power-to-X you use electricity as a feedstock and convert it into another form of energy. The best-known route is power-to-gas: through electrolysis, electricity splits water into hydrogen and oxygen. That hydrogen can be stored, transported and used later, also as a fuel or a chemical feedstock. With power-to-heat you turn electricity into heat, for example for a heat network or an industrial process. With power-to-fuel and power-to-chemicals you build, from hydrogen and a carbon or nitrogen source, liquid fuels or substances such as ammonia and methanol. The idea behind it is sector coupling: linking the power sector to heat, transport and industry.
- Power-to-gas or power-to-hydrogen: electricity becomes hydrogen through electrolysis.
- Power-to-heat: electricity becomes heat for a network or process.
- Power-to-fuel and power-to-chemicals: hydrogen becomes fuel, ammonia or methanol.
- The common thread is sector coupling: using electricity beyond the power grid.
Why does power-to-X matter?
Power-to-X fills a gap that batteries and the grid alone do not close. First, it helps with surpluses: when there is a lot of solar and wind, you can convert electricity into hydrogen or heat instead of curtailing generation. Second, it enables seasonal storage. Hydrogen can be kept for a long time and in large volumes, for example in salt caverns, which is not affordable with batteries. Third, it decarbonises sectors that are hard to electrify directly. Hydrogen can serve as a fuel for industrial processes that need high heat, as a feedstock for chemicals and fertiliser, and as an emission-free fuel for heavy transport.
- Use surplus solar and wind instead of curtailing it.
- Seasonal storage: keep hydrogen long and at scale, including in salt caverns.
- Decarbonise industry, chemicals and heavy transport that cannot be electrified directly.
- Hydrogen can supply electricity again when solar and wind fall short.
Where are the limits?
Power-to-X is not a free solution. Every conversion costs energy, so efficiency is lost. If you turn electricity into hydrogen and that hydrogen back into electricity, you keep only part of it; the round-trip efficiency of hydrogen storage is currently limited. So a rule of thumb applies: if you can electrify an application directly, do that, because it is more efficient. Electrolysis and the associated installations are also expensive and need many running hours to be economic. Power-to-X works best where direct electricity is not possible, where you would otherwise lose surpluses, or where you want to store energy for a long time.
- Conversion costs energy; the round-trip efficiency of hydrogen is currently limited.
- Direct electrification remains more efficient and simpler where possible.
- Electrolysis installations are expensive and require many running hours.
- Most value lies in hard-to-electrify applications and long-term storage.
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