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The way we produce electricity has changed; we are no longer compelled to rely on expensive, polluting fossil fuels and instead have opted for cleaner and cheaper sources.
Power generation in the future is likely to consist of a mix of low-carbon sources such as renewables, hydro and nuclear power. But while renewable sources like the sun and wind now supply a large proportion of our energy, they are intermittent, only generating energy at certain times.
To reap the full benefits of renewables, we must store some of the energy when it is generated and use it in peak demand. One way to do this is with stationary energy storage in the form of batteries.