On February 1st 2018, Kiwi Power, a UK demand response and energy resource aggregation company, unveiled its largest behind the meter battery to date with the completion of the 4MW / 4.8MWh Tesla battery at Parc Stormy. The battery took three months to build and provides firm frequency response (FFR) to the National Grid via a two year contract offering 24 hour availability. The battery will make use of the onsite renewable energy produced by solar, wind and anaerobic digestion generation.
How can batteries participate in balancing grid frequency?
National Grid is responsible for keeping frequency balanced at 50Hz. A change in grid frequency is caused by an imbalance of supply and demand.
When there is not enough power, batteries are discharged to balance under frequency preventing blackouts and brownouts.
To balance over frequency, batteries are charged to prevent dangerous spikes across electricity infrastructure.
Batteries systems will be installed on site to monitor frequency and charge/discharge to respond during a frequency event.