POWER CALCULATION APPARATUS AND POWER CALCULATION METHOD

A power calculation apparatus(100) calculates an amount of power suppliable and demandable between a battery (12) and a power grid (2) The power calculation apparatus (100) includes: a power prediction unit (114) configured to predict the amount of power suppliable and demandable between the battery (12) and the power grid (2) at a predetermined point in time to calculate a prediction value of the amount of power suppliable and demandable; and a logic switching unit (115) configured to switch a calculation logic to be applied to a calculation of the prediction value by the power prediction unit (114), based on a length of duration from a present point in time to the predetermined point in time.