Wind turbines convert moving air into electricity, and that electricity powers everything from individual homes to entire cities. But generating grid power is only part of the picture. Wind turbines also pump water on farms, charge batteries on boats, and are increasingly being used to produce hydrogen fuel. Here’s a closer look at each of these applications.
How Wind Turbines Generate Electricity
Wind flowing over a turbine’s blades creates lift, similar to the effect on airplane wings, which causes the blades to spin. Those blades connect to a drive shaft that turns an electric generator, converting the wind’s kinetic energy into electrical current. That electricity then feeds into the power grid, where it’s distributed to homes, schools, and businesses.
This is, by far, the most common use of wind turbines today. Large utility-scale turbines are grouped into wind farms, sometimes with dozens or hundreds of machines, producing enough power for tens of thousands of homes at a time. A single 12-turbine offshore project near New York, for example, is estimated to supply renewable energy to over 70,000 homes.
Powering Coastal Cities With Offshore Wind
Offshore wind farms sit in bodies of water where winds blow stronger and more consistently than on land. This matters because nearly 80 percent of U.S. electricity demand comes from coastal and Great Lakes states. Placing turbines offshore puts the power source close to where most people actually live. The electricity generated travels through undersea cables to coastal distribution points, which route it into the existing grid.
Offshore wind does cost more than onshore wind. New onshore wind projects entering service in 2030 are projected to produce electricity at about $30 per megawatt-hour, while offshore wind comes in around $53. For context, a new natural gas plant is projected at roughly $59 per megawatt-hour, making both forms of wind power cheaper than the most common fossil fuel alternative.
Residential and Small-Scale Systems
Wind turbines aren’t just massive structures on hillsides. Homeowners, ranchers, and small business owners use smaller turbines to cut their electricity bills, sometimes by as much as 100 percent depending on local wind conditions. Residential turbines range from 400 watts to 100 kilowatts, with the size depending on how much electricity you need to generate.
At the smallest end, micro turbines in the 20- to 500-watt range charge batteries for recreational vehicles and sailboats. Mid-range turbines in the 1- to 10-kilowatt range can power water pumps on farms. Larger residential systems can supply electricity for an entire house and barn. One example: a single turbine on a Massachusetts farm generates enough power for both the home and its agricultural buildings.
These smaller systems are especially valuable in remote locations. If you’re far from the nearest utility lines, extending grid power to your property can be extremely expensive. A wind turbine paired with solar panels and battery storage (a hybrid system) can provide reliable off-grid electricity for homes, farms, or even small communities. An average annual wind speed of at least 9 miles per hour is generally the minimum threshold for these setups to make sense.
Pumping Water for Farms and Livestock
Long before wind turbines generated electricity, windmills pumped water. That application is still alive today, particularly for livestock watering in remote areas where grid power isn’t available. Most water-pumping windmills use a multi-bladed rotor that provides the high torque needed to drive a mechanical pump, and they’re typically positioned directly over a well.
The most common setup uses a piston-type cylinder pump connected to the windmill rotor through a gear box and reciprocating rod. An alternative approach uses the windmill to power an air compressor, which then operates an air-lift pump. This design is sometimes used for deep wells and has the added benefit of being able to aerate farm dugouts and ponds. Modern wind-electric pumping systems have largely overtaken traditional mechanical windmills on many operations because they’re more versatile and can pump roughly twice the volume of water for the same upfront cost.
Producing Green Hydrogen Fuel
One of the newer applications for wind energy is producing hydrogen through a process called electrolysis, which uses electricity to split water into hydrogen and oxygen. When wind turbines supply that electricity, the result is “green hydrogen,” a fuel that can be stored, transported, and burned without producing carbon emissions.
Offshore wind is particularly promising for this purpose. Deep offshore locations can achieve capacity factors of 60 to 70 percent, meaning the turbines generate power that large a share of the time. That’s four to five times the capacity factor of typical onshore sites. Dedicated offshore wind farms for hydrogen production can channel more than 80 percent of their generated energy into electrolysis, making the economics more favorable. In some scenarios, converting wind energy to hydrogen offshore and then shipping it to land is actually the most cost-effective way to get that energy where it’s needed.
The cost of green hydrogen is still dominated by the price of the electricity used to produce it, so cheaper offshore wind directly translates to cheaper hydrogen. As offshore wind technology continues to scale up, hydrogen production from wind is expected to play a significant role in decarbonizing sectors like heavy industry and long-haul transportation that are difficult to electrify directly.