Complex sentence: Unlike geothermal, solar power is a non-dispatchable renewable energy source-the sun follows a predictable but uncontrollable path, and weather is not controllable, making both wind power and solar power variable renewable energy (VRE) sources.
Split into simpler sentences: Unlike geothermal, solar power is a non-dispatchable renewable energy source-the sun follows a predictable path but the weather is not controllable. This makes both wind power and solar power variable renewable energy (VRE) sources.