and the power storage portion 12 has a sufficient amount of remaining capacity 9 kwh at a start time 12 00 of the charge schedule besides in the present specific example a case is envisioned where three three electric vehicles c battery charges are performed during four unit time durations 12 00 14 00 14 00 16 00 as shown in the graph on the top stage of fig1 if each battery charge is performed within each unit time duration like in fig3 the maximum value in the present specific example 15 20 35 kwh of the system power amount consumed during the unit time duration is likely to become large for example as described in the first specific example the basic rate for one year reaches about 1 34 million yen accordingly in the present specific example to decrease the maximum value of the system power amount consumed during the unit time duration as shown in the graphs on the middle and bottom stages of fig1 the control portion 15 controls the charge portion 11 and the power storage portion 12 in the present specific example one of the three battery charges is performed bridging the two unit time durations as described above see fig5 for example the last or first battery charge of the three is performed bridging the two unit time durations 13 00 14 00 15 00 16 00 for example at this time the middle time point 13 30 15 30 of the battery charge and the time point 13 30 15 30 at the boundary between the.