The phrase "enough energy" means having sufficient physical or mental power to do something or to keep going without feeling tired or lacking motivation. Full definition
The phase provides a balance of carbohydrates and protein, with a little amount of fat to supply the body with enough energy for performance. (regularityfitness.com)
It recently also confirmed that chemical reactions between water and rock on the moon can provide enough energy in the water to feed microbial life. (businessinsider.com)
This small plant is producing enough energy from landfill gas to power 10,000 homes, making it the largest facility of its kind in the state. (insteading.com)