A computer device , configured to: control charging currents of a plurality of charging stations of electric vehicles by internet based communications, wherein a load adjustment of the charging currents determined in response to the at least one electric vehicle requesting start or stop charging, wherein the internet based communications comprise manufacturer specific protocols of different manufacturers of the plurality of charging stations and wherein the plurality of charging stations are wirelessly coupled to the computer device , determine subgroups (202,204,A1,A2,A11,A12,A13,A21,A22), each subgroup comprising at least one charging station of the plurality of charging stations, and each charging station of the plurality of charging stations belonging to one subgroup; determine parent groups (204, 202, A, A1, A2), each parent group (204, 202, A, A1, A2) comprising at least one of the subgroups (204, 202, A1, A2, A11, A12, A13, A21, A22), and each of the subgroups (204, 202, A1, A2, A11, A12, A13, A21, A22) belonging to one parent group (204, 202, A, A1, A2); each charging station of the plurality of charging stations , each subgroup (204, 202, A1, A2, A11, A12, A13, A21, A22) and each parent group (204, 202, A, A1, A2) having an original maximum current and a dynamic maximum current, wherein the original maximum current comprises a maximum current capacity, and the dynamic maximum current depends on the number of charging electric vehicles; and control the charging currents by setting the dynamic maximum current of each charging station of the plurality of charging stations , of each subgroup (204, 202, A1, A2, A11, A12, A13, A21, A22) and of each parent group (204, 202, A, A1, A2) so that for each charging station, each subgroup and each parent group the dynamic maximum current does not exceed the original maximum current. control charging currents of a plurality of charging stations of electric vehicles by internet based communications, wherein a load adjustment of the charging currents determined in response to the at least one electric vehicle requesting start or stop charging, wherein the internet based communications comprise manufacturer specific protocols of different manufacturers of the plurality of charging stations and wherein the plurality of charging stations are wirelessly coupled to the computer device , determine subgroups (202,204,A1,A2,A11,A12,A13,A21,A22), each subgroup comprising at least one charging station of the plurality of charging stations, and each charging station of the plurality of charging stations belonging to one subgroup; determine parent groups (204, 202, A, A1, A2), each parent group (204, 202, A, A1, A2) comprising at least one of the subgroups (204, 202, A1, A2, A11, A12, A13, A21, A22), and each of the subgroups (204, 202, A1, A2, A11, A12, A13, A21, A22) belonging to one parent group (204, 202, A, A1, A2); each charging station of the plurality of charging stations , each subgroup (204, 202, A1, A2, A11, A12, A13, A21, A22) and each parent group (204, 202, A, A1, A2) having an original maximum current and a dynamic maximum current, wherein the original maximum current comprises a maximum current capacity, and the dynamic maximum current depends on the number of charging electric vehicles; and control the charging currents by setting the dynamic maximum current of each charging station of the plurality of charging stations , of each subgroup (204, 202, A1, A2, A11, A12, A13, A21, A22) and of each parent group (204, 202, A, A1, A2) so that for each charging station, each subgroup and each parent group the dynamic maximum current does not exceed the original maximum current. <EOS>