Sam Bowers

Calculator · v1.0 · 26 May 2026

The Electricity Burden of Military e‑SAF

Replacing military jet fuel with synthetic fuels is not simply a fuel challenge. It is a power-system buildout challenge — and a production capacity one.

Europe's armed forces run on jet fuel. Aviation accounts for roughly 85 percent of military liquid fuel demand — a figure that holds across NATO allies in conflict scenarios, and that reflects the basic physics of high-performance aircraft. The F-35 requires 60 percent more fuel per sortie than the F-16 it replaces. Eurofighters, Typhoons, and Rafales share the same constraint: high-energy liquid hydrocarbons, stored in volume, available at dispersed forward locations.

This dependency is both a strategic vulnerability and a long-term logistics problem. A disruption to Europe's jet fuel supply — through refinery constraints, pipeline failure, or geopolitical pressure on the Central Europe Pipeline System — directly impairs operational readiness. As military demand on European fuel infrastructure grows, so does the case for synthetic alternatives produced domestically from electricity.

Synthetic aviation fuel — e-kerosene, produced from renewable electricity, electrolytic hydrogen, and captured carbon dioxide — is technically viable and drop-in compatible with existing engines. For military planners, it offers something biofuels cannot: domestic production controlled by governments that also control electricity networks. The challenge is not technical feasibility. It is electricity scale and production buildout. Each tonne of e-kerosene requires 22 to 35 megawatt-hours of electricity depending on the CO₂ source — and as of 2025, no commercial-scale e-SAF plant exists anywhere in the world. Europe's entire realistic production pipeline for 2030 is 360,000 to 1.7 million tonnes. The calculator below shows what military demand would require.

Scale calculator

Select a replacement percentage and CO₂ source assumption. Outputs update to show implied annual electricity demand, infrastructure requirements, and production capacity gap.

Military fuel replaced by e-SAF
CO₂ source assumption
e-SAF required 2.00 Mt per year
Electricity demand 70.0 TWh per year
Hydrogen required 600 kt H₂ per year
Offshore wind equivalent 19.9 GW capacity
Share of EU electricity 2.56 % of 2024 EU generation
Production capacity required 2,000 kt/year — vs. 360–1,700 kt projected EU 2030 pipeline IEA 360 kt T&E 1,700 kt

Demand exceeds T&E 2030 projection. No large-scale EU plant has reached final investment decision.

Electricity demand by replacement scenario

Annual TWh required to produce military e-SAF at each replacement level. Updates when you change the CO₂ source assumption above. Click a row to select that scenario.

0 20 40 60 80 TWh per year ReFuelEU 2030 synth. EU offshore wind fleet 5% 7 TWh 10% 14 TWh 25% 35 TWh 50% 70 TWh

Reference lines: ReFuelEU 2030 synthetic sub-mandate (~11 TWh); EU offshore wind fleet output at 40% capacity factor (~74 TWh, from 21.2 GW installed). Baseline: EU military aviation fuel ~4 Mt/year.

Competing electricity claims on EU clean power

Annual electricity demand from sectors competing for the same renewable generation. The vertical line marks approximately one year of EU clean power additions — the pace at which Europe is currently expanding its grid.

0 50 100 150 200 TWh per year ← 1 yr EU clean additions (~100 TWh) EU data centres (2030) 115–168 TWh (IEA / Ember) 150 TWh EU green steel (2030 projects) ~135 TWh (Stockholm Environment Inst.) 135 TWh EU data centres (2024) ~96 TWh (EU Commission) 96 TWh Military e-SAF 50% — DAC CO₂ 35 MWh/t, 4 Mt baseline 70 TWh Military e-SAF 50% — point-src 22 MWh/t, 4 Mt baseline 44 TWh ReFuelEU synthetic (2030) 0.7% of EU aviation fuel, civilian only 11 TWh

Sources: EU data centres — EU Commission / Ember (2025); green steel — Stockholm Environment Institute; annual EU clean additions — derived from 73–85 GW new capacity, 2023–24 (Ember). Military e-SAF figures assume 4 Mt baseline and 50% replacement, both CO₂ source assumptions shown.

"At 50% replacement with direct air capture, EU military e-SAF alone would require electricity roughly equivalent to the entire output of Europe's current offshore wind fleet — built over decades, now serving 26 countries."

"Military synthetic fuels compete for clean electricity with electrification, industry, hydrogen production, data centres, and civilian aviation mandates — all simultaneously expanding their claims on renewable generation that adds only ~100 TWh per year."

"The production constraint is more binding than the electricity constraint. As of 2025, no commercial-scale e-SAF plant exists anywhere in the world. The world's first industrial-scale PtL facility — 5 tonnes of certified e-kerosene — still does not function as planned after four years."

Is e-SAF a solution for military aviation?

The honest answer is a conditional yes — for a narrow but strategically important use case — and a firm no as a broad decarbonisation solution at current buildout rates.

As a niche resilience tool, e-SAF is viable. Replacing 5–10% of military aviation fuel would require 200–400 kt of production per year and 5–14 TWh of electricity. Both are within reach of a determined buildout: the electricity demand is modest relative to the EU's clean power expansion, and the production volume sits within the lower end of announced European pipelines. For strategic reserve stockpiling, forward operating base fuel security, or high-value mission-critical aircraft, synthetic fuel offers something conventional supply chains cannot — domestic, sovereign production, decoupled from fossil fuel supply chains and Russian pipeline leverage. Norway's commitment to 15% biofuel blending for military operations points toward the realistic near-term model.

As a broad solution, the constraints accumulate rapidly. The 25–50% replacement scenarios require 1–2 million tonnes of e-SAF per year — comparable to or exceeding Europe's entire projected 2030 production pipeline, leaving nothing for civilian aviation's mandatory ReFuelEU obligations. The electricity demand reaches 35–70 TWh (DAC assumption), competing directly with EU data centre growth, green steel electrification, and EV charging — all priority claims on the same renewable buildout. And all of this assumes a production infrastructure that, as of mid-2025, does not exist: not one large-scale European e-SAF project has reached final investment decision.

The most defensible conclusion is that e-SAF is a viable component of military energy resilience — not a replacement for it. The realistic military e-SAF role is strategic reserve and partial mission coverage for the highest-priority capabilities, powered by dedicated renewable installations rather than grid draw, built incrementally over the 2027–2035 window as the first commercial-scale facilities come online. Treating it as a broad fuel solution would require a clean power overbuild and a production buildout that Europe has not yet committed to, and that would crowd out other electrification priorities in the near term. Europe is adding clean generation at roughly 100 TWh of new output per year. Military e-SAF can take a niche slice of that. It cannot take most of it and still serve everything else the transition demands.

Methodology and assumptions

Electricity and process parameters

ParameterValueBasis
EU military aviation jet fuel ~4 Mt/year Estimated. Not publicly disaggregated. Derived from EU27 total aviation fuel (~46 Mt, Eurostat) and an assumed peacetime military share of 3–8%. Significant uncertainty — wartime scenarios would substantially increase this figure.
Intensity — point-source CO₂ 22 MWh/t Near-term with industrial flue gas CO₂. Consistent with ICCT (2022) and T&E ranges.
Intensity — direct air capture 35 MWh/t CATF "Decarbonizing Aviation" (2024): 32 kWh/L at 2025 tech. Converted at 0.804 kg/L → ~40 MWh/t; 35 used as conservative near-term figure. Only pathway closing the carbon cycle fully.
Intensity — 2050 optimistic 25 MWh/t CATF 2050 projection: 20 kWh/L → ~25 MWh/t with improved electrolyser and DAC.
H₂ per tonne e-SAF 0.30 t/t Fischer-Tropsch chemistry; literature range 0.28–0.33 t H₂/t fuel.
CO₂ per tonne e-SAF 3.1 t/t Carbon stoichiometry: jet fuel ~85% C by mass at 44/12 molecular ratio.
Offshore wind capacity factor 40% North Sea typical (WindEurope / IRENA). Southern siting implies more capacity for equivalent generation.
EU electricity generation 2,732 TWh Ember: European Electricity Review 2025 (2024 data).
EU cumulative offshore wind (2024) 21.2 GW → ~74 TWh/yr WindEurope / EU Blue Economy Observatory, 2024.

Production capacity benchmarks

BenchmarkValueBasis
Current operational e-SAF (2025) ~0 commercial scale T&E tracker (2024); T&E report (May 2025). World's first industrial-scale PtL plant (Atmosfair, Germany) produced 5 tonnes TÜV-certified e-kerosene. As of April 2025, plant "still doesn't function nearly as planned after four years." No commercial-scale plant exists globally.
EU pipeline 2030 — optimistic (T&E) 1,700 kt/year T&E e-kerosene tracker: 25 EU projects with ambition to produce 1.7 Mt by 2030. Pipeline has shrunk 25% vs. prior year's estimates. Zero large-scale European projects have reached FID. Each plant requires €1–2bn investment.
Global 2030 — IEA main case ~360 kt/year IEA Renewables 2024: e-kerosene forecast at ~5% of 9 billion litres total SAF in 2030. Converted at 0.804 kg/L and 1,000 L/t. Reflects mandated European sub-targets only.
First commercial e-SAF deliveries expected 2026 T&E / EASA SAF market data; assuming announced project timelines hold.

Competition chart sources

ItemValueSource
EU data centres 2024~96 TWhEU Commission energy focus report (Nov 2025)
EU data centres 2030115–168 TWhIEA / Ember grids for data centres report (2025)
EU green steel 2030~135 TWhStockholm Environment Institute — renewable electricity demand for announced green iron and steel projects
Annual EU clean power additions~100 TWh/yrDerived from 73–85 GW new wind + solar capacity annually (Ember 2024–25) at blended capacity factors
ReFuelEU synthetic mandate 2030~11 TWh0.7% of EU aviation fuel (~44 Mt) at 35 MWh/t DAC assumption

Key uncertainties

The military aviation fuel baseline is the largest source of uncertainty — EU member states do not publish disaggregated military fuel data. The CO₂ source assumption is the largest swing factor in the electricity calculation. Production capacity projections are highly uncertain: no EU e-SAF project has FIDs, timelines are slipping, and announced figures have shrunk 25% year-on-year.

Sources