While a strong mix of energy types in the supply chain reduces the impact of intermittency, renewable energies are compromised by the irregular nature of the source. The sun is not always shining, and the wind doesn’t always blow.
Given that our power grids need to provide constant electricity supply to homes and businesses, fossil fuel systems are essential in retaining a constant source of energy when renewable sources are offline.
For example, natural gas power stations can come online immediately, buffering the system against supply failure in the case of low hydro-powered power station supply.
Breakthroughs in energy storage, particular in battery technology, will go a long way to reducing the consequence of intermittency when those technologies mature.