Storing solar energy is extremely important, especially when the sun isn’t shining. Finding a way to store energy is an obstacle that can be overcome though.
You can store solar power by converting the sun’s energy into heat. There are plants already based in Spain which can store excess energy in molten salt. These solar plants can absorb high temperatures without changing state.
With many different ways of storing sunlight available, will solar power negate the need for fossil fuels in the future? We doubt it would go down to zero, but we can foresee a future where we use other forms of technology to cut down on fossil fuel use.