It's way cheaper and more efficient for electricity consumers to purchase power from the grid, and for the grid to figure out the most optimal way to produce and deliver the power.
Solar and wind are in many areas a) only available during certain hours b) expensive.
To ensure you have a stable power cost, and stable power availability, you as a large consumer (In the EU) make PPA agreements with power producers for specific KW rates, for specific KWh amounts, for specific times. These are complicated agreements.
A few panels on some warehouses and hangers close to an airport could keep the lights and the A/C on in the terminal, but that's about it. No one is putting up wind turbines anywhere close to an airport.
Solar and wind are in many areas a) only available during certain hours b) expensive.
To ensure you have a stable power cost, and stable power availability, you as a large consumer (In the EU) make PPA agreements with power producers for specific KW rates, for specific KWh amounts, for specific times. These are complicated agreements.
A few panels on some warehouses and hangers close to an airport could keep the lights and the A/C on in the terminal, but that's about it. No one is putting up wind turbines anywhere close to an airport.