Electric Aircraft

Electric aircraft are aircraft that derive all or a significant portion of their propulsive power from electric motors rather than combustion engines, using energy stored in batteries, fuel cells, or supplied via an electric generator driven by a turbine. Fully battery-electric aircraft are currently viable only for very short-range operations — typically regional routes under 200 kilometers — due to the energy density limitations of current battery technology, which stores roughly 250 to 300 watt-hours per kilogram compared to approximately 12,000 watt-hours per kilogram for jet fuel. Hybrid-electric configurations, which combine electric motors with conventional turbines, offer intermediate emission reductions on short-haul routes while battery technology matures.

What Is an Electric Aircraft?

The electric aircraft category spans a wide performance range. At one end are general aviation aircraft such as the Pipistrel Velis Electro, which received the world's first type certificate for an electric aircraft from EASA in 2020 and can carry two occupants for approximately 50 minutes. At the commercial end, startups including Heart Aerospace, Eviation, and Harbour Air have announced or conducted test flights of all-electric commuter aircraft targeting routes of 100 to 400 kilometers with 9 to 30 passengers. Hybrid-electric regional aircraft are under development by companies including ATR and Airbus through the RISE program, targeting 20 to 30 percent fuel burn reductions on turboprop-sized platforms. Urban Air Mobility aircraft — electric vertical takeoff and landing vehicles from companies like Joby Aviation, Archer, and Lilium — target even shorter intercity and intracity ranges of 50 to 150 kilometers.

How It Works in Practice

The physics of electric aviation are fundamentally constrained by Ragone space: the trade-off between specific energy and specific power of energy storage systems. Lithium-ion battery cells commercially available in 2025 achieve approximately 250 to 300 Wh/kg at the cell level, falling to 150 to 200 Wh/kg at the pack level after accounting for thermal management, structural elements, and battery management systems. Jet fuel's 12,000 Wh/kg energy density means a battery pack weighs roughly 60 times as much as the jet fuel it replaces for equivalent stored energy — and unlike jet fuel, battery weight does not decrease as energy is consumed, so the aircraft carries full battery mass throughout the flight. This weight penalty compounds rapidly with range, making electric propulsion economically viable only when routes are short enough that the fuel cost savings justify the battery cost and weight penalty.

Why It Matters

Electric aircraft matter to aviation's sustainability transition primarily for the segments of the market where their range limitations are irrelevant: ultra-short domestic routes in island nations, seaplane operators, regional connections between small airports with low traffic, and urban air mobility. In these segments, electrification offers operating cost advantages because electric motors have fewer moving parts than turbines, require less maintenance, use cheaper energy per kilometer, and produce no local air pollutants — important for airports near urban centers. For the mainline commercial aviation market — the 1,000 to 15,000 kilometer range where 90 percent of global seat-kilometers are flown — battery technology would need to achieve approximately 1,500 Wh/kg at the pack level to be competitive, a threshold that researchers do not project reaching before 2040 at the earliest.

Key Facts and Figures

• The Pipistrel Velis Electro (2-seat) received EASA type certification in June 2020, the first for any electric aircraft.
• Heart Aerospace's ES-30 targets 30 passengers over 200 km all-electric, with a 400 km hybrid mode; entry into service targeted 2028.
• Eviation's Alice turboprop-equivalent all-electric aircraft completed its first flight in September 2022 with a 9-passenger, 815 km range target.
• Current best commercial battery cell energy density: approximately 300 Wh/kg (LFP and NMC chemistries).
• Battery energy density required for short-haul commercial viability: approximately 500 to 800 Wh/kg, not expected before 2035.
• Joby Aviation received FAA G-1 certification basis acceptance in 2022 for its eVTOL, targeting 2025 commercial operations.

Related Concepts

Hydrogen-Powered Aviation, Sustainable Aviation Fuel, Net-Zero Aviation, Winglet Fuel Savings, Flight Path Optimization