Patent ID: 8624558

Claim:
An electricity supply apparatus of an industrial site comprising a load configured to draw a predetermined current, said electricity supply apparatus comprising: a control device capable of being configured to calculate an amplitude of a control signal according to price information indicative of a price per time unit of a first current drawn from a mains and to generate said control signal; an energy station capable of being configured to draw said first current from said mains to provide at least a first part of said first current to said load, to receive said control signal from said control device, and to reduce said first current by an amount proportional to said amplitude of said control signal; and a battery electrically connected to said energy station and to said load, said battery capable of being configured to, when said first current drawn by said energy station from said mains is greater than said predetermined current which said load is configured to draw, recharge by drawing a second part of said first current from said energy station and, when said first current drawn by said energy station from said mains is smaller than said predetermined current which said load is configured to draw, to discharge by providing a second current to said load, wherein said control device is capable of being further configured to calculate said amplitude of said control signal also according to battery information relating to at least one of a recharge condition and a discharge condition of said battery, said amplitude having an intermediate value of a range delimited by a minimum value and a maximum value.