Describe the disadvantages of using renewable energy resources compared to fossil fuels for large-scale electricity generation.

Renewable energy sources are unreliable or intermittent – for example, solar power does not generate electricity at night or during cloudy weather, and wind turbines only operate when the wind is blowing.

Because of this variability, renewable technologies cannot produce as large a continuous amount of electricity as fossil‑fuel plants, which run at high capacity factors.

The technology to capture and convert renewable energy is still developing; the infrastructure (e.g. large‑scale solar farms, wind farms, grid connections) is less mature and more expensive to build than the established fossil‑fuel power stations.

These factors mean that, for large‑scale electricity generation, renewables are less reliable, produce lower output and require significant investment in new technology and infrastructure.