Sunlight – the 'fuel' that solar panels use to generate electricity – can be considered a secure fuel source because it does not need to be imported, and so is not subject to the price fluctuations of international markets or geopolitical disruptions to supply. It is possible for the supply of sunlight to the UK's photovoltaic panels to be disrupted, but this is due to its inherent intermittency as an energy source, which is a reliability issue.
These are the security of supply challenges facing solar power. Read about the possible solutions.
Find out more about solar power as a means of generating electricity.
Compare this aspect of solar power with other energy sources.