The energy resource often used as a backup for renewable sources like wind and solar is Natural gas.

Natural gas is commonly used as a backup energy source for wind and solar power because it can be quickly ramped up or down to meet demand when renewable sources are not generating enough electricity. Wind and solar are intermittent by nature, meaning they don’t produce power all the time, depending on weather conditions. Natural gas power plants can provide reliable, on-demand energy to fill this gap, making it an essential part of the transition to cleaner energy while maintaining grid stability.