The price of renewable energy has hit all-time lows in recent years and is expected to keep falling, particularly for solar and wind power, as infrastructure and supply catch up to the increasing demand. Unlike fossil-fuel reserves owned by sovereign governments or private producers, sunlight and wind are free to all. But continuing costs arise from harnessing, storing and distributing their energy to end users.
The International Renewable Energy Agency estimates that costs for solar and wind power technologies could fall by at least 26% and as much as 59% between 2015 and 2025.