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7 March 2021
Battery storage is coming to a grid near you, if it’s not there already. Little ones in households and big ones like in Hornsdale, South Australia, are being deployed in support of the clean energy revolution.
But what are they doing there? What can batteries do?
For starters, they’re not really “batteries”, more accurately they’re a battery energy storage system; we have a few at work and we call them “BESS” when we’re being formal, but normally just batteries.
The battery part is just where the energy is stored, and it is usually thousands of cells connected in series and parallel to achieve the desired voltage and current. This is the DC (direct current) part of the system, an energy storage reservoir hidden away inside the BESS.