Onshore wind: Techniques

How one design became among the cheapest electricity anywhere

What this tab covers The methods used to capture this energy: how each works, and how they compare on efficiency, cost, life-cycle emissions, maturity and scale.

Onshore wind uses one dominant design: a three-blade horizontal-axis rotor on a steel tower, facing into the wind. It is now among the cheapest sources of new electricity.

Comparison

Method	Efficiency	Cost	Life-cycle emissions	Maturity	Scale
Horizontal-axis turbines, onshore¹²³⁴⁵⁶¹⁴	40-50% power coefficient in normal operation; 36% average capacity factor for 2025 projects	USD 33/MWh global average LCOE for 2025 projects, installed cost USD 976/kW (IRENA, 2025 USD); US reference project USD 42/MWh and USD 1,968/kW (NREL, 2023 USD)	Median 11 g CO2e/kWh, range 7-56 (IPCC AR5); 7.8-16 g CO2e/kWh (UNECE 2022)	mature	155 GW added in 2025; about 1,200 GW installed worldwide at end of 2025 (calculated as 1,299 GW of all wind minus about 92 GW offshore)

The global average cost of electricity from new onshore wind fell by 71% between 2010 and 2025, to USD 33/MWh (IRENA), driven by bigger rotors, higher capacity factors and cheaper installation. Costs vary widely by country: NREL's US reference project, at USD 42/MWh in 2023 dollars, sits above the global average. Life-cycle emissions are among the lowest of any source, since there is no fuel and almost all emissions come from making steel, concrete and blades. The main drawback is variability: output follows the weather, so wind needs storage, flexible plants or grid links to supply power at all hours.

How each method works

Horizontal-axis turbines, onshore

Wind passing over aerofoil-shaped blades creates lift that turns the rotor, typically at 10-20 revolutions per minute. A gearbox (or a large direct-drive generator) turns this into electricity, and power electronics match it to the grid. A yaw motor keeps the rotor facing the wind and the blades pitch to limit power in strong winds. Turbines are grouped into wind farms connected to a substation.¹²³⁴⁵⁶¹⁴

Sources

Physical limits of wind energy within the atmosphere and its use as renewable energy: from the theoretical basis to practical implications (Kleidon, Meteorologische Zeitschrift 30(3)) arXiv (author manuscript of peer-reviewed paper), 2021
Renewable Power Generation Costs in 2025 (Executive summary, Figure S1) IRENA, 2026
Cost of Wind Energy Review: 2024 Edition (NREL/PR-5000-91775), reference projects in 2023 USD National Renewable Energy Laboratory, 2025
Climate Change 2014: Mitigation, Annex III Technology-specific cost and performance parameters, Table A.III.2 (life-cycle emissions, min/median/max) IPCC AR5 Working Group III, 2014
Carbon neutrality in the UNECE region: integrated life-cycle assessment of electricity sources (ECE/ENERGY/141) United Nations Economic Commission for Europe, 2022
Global wind installations rise a record 40% (reporting GWEC Global Wind Report 2026, 2025 data) North American Clean Energy, 2026
GWEC unveils offshore wind plan as global capacity hits 92.5 GW (reporting GWEC Global Offshore Wind Report 2026) Modern Power Systems, 2026