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Hybrid energy storage systems (ESS) combine individual advantages of different types of storage to realise a single ESS with both higher power and energy capabilities. Battery-supercapacitor based hybrid ESS help to reduce the battery power rating and extend battery life by minimizing the current variation.

Battery storage plays an important role in microgrids, improving grid reliability and resilience while facilitating effective operation of critical and frequency-sensitive loads. Battery storage is critical both for daily operation of a microgrid, as well as providing for grid redundancy in extreme events.

Battery storage provides significant advantages for integrating intermittent renewable energy systems into the electricity grid. Battery storage has the potential to become standard in new renewable energy installations, increasing their competitiveness and greater deployment of renewables.

Massive penetration of energy storage systems presents new opportunities for power network operators and individual customers. Innovative cooperation of distributed energy storage systems can improve power quality while bringing additional capacity, flexibility and redundancy into power networks.

Solid-state transformers (SSTs) are poised for widespread use in connecting renewable energy sources to the utility grid, replacing traditional 50 Hz transformers in the distribution and higher voltage grid, microgrids and battery-changing installations.