2. System components (1) Redox flow battery (1 MW x 5 hours) A
redox flow battery is a storage battery that comprises a
charging/discharging cell section and a tank full of metal ion
electrolyte. It charges/discharges through oxidation-reduction
of vanadium or other ions. The battery features long service
life as the electrodes and electrolyte are not subject to
deterioration even after repeated charge/discharge operations
and is easily maintained as its uses the same electrolyte in
both the cathode and anode. It also provides increased safety as
it does not require any combustible substances and is operated
at ambient temperatures. This battery is suitable for irregular,
highly fluctuating charge/discharge operations, enabling
accurate monitoring and control of stored electric power.
Accordingly, it is an optimal storage battery for efficient use
of renewable energy and surplus electricity supplied during the
night. (2) Concentrator photovoltaic (CPV) unit (maximum power
generation of a total of 28 units: 20