How are solar power and wind power unreliable?

Answer 1

Solar Panel Issues Include

1. Solar energy is not available 24 hours a day
2. Cloudy weather reduces solar output
3. Dust on solar panels reduce the power output
4. As temperature of the solar panel increase their efficiency decreases

Wind Power Issues Include

1. Wind energy is not available 24 hours a day
2. Wind power must be stored or put into a dummy load otherwise the generator will break.
3. Wind strength is variable.
4. Bird and bat strikes

Alternative energy strengths

1. Geographically distributed alternative energy improves its overall availability
2. Alternative energy into the electricity grid eliminates the need for local storage
3. Solar thermal energy can be stored in salt ponds to extend operating hours.
4. Excess alternative energy can be used for peaking power plants such as 2 level dams and hydro electricity.
5. Solar energy output and grid energy demand both closely follow temperature in warm climates. E.g. above 18 degrees Celsius.