A turbine-generator system includes a power source powered by renewable energy. The power source drives a compressor, which outputs compressed air to pressurized tanks. A turbine is connected to the tanks via one or more nozzles. The turbine includes turbine blade assemblies and a turbine flywheel, each rotatably mounted to a shaft. The nozzles deliver compressed air to the turbine blades. The turbine includes a magnet motor for selectably applying torque to the turbine flywheel. The turbine is coupled to a generator via a magnetic clutch. An external control computer controls the rotational speed of the magnet motor and the amount and timing of the compressed air injected onto the turbine blades. A load sensor is coupled to an output of the generator and is in communication with the external control computer.