Method for detecting an input channel configuration of a multi-channel inverter having a plurality of input channels (CH 1, CH 2, CH i-1, CH i, CH N-1, CH N), each input channel being electrically connected with a corresponding power converter (C 1, C 2, C i-1, C i, C N-1, C N) and, upon an operative installation of said multi-channel inverter, being electrically connectable to a DC electric power source (S 1, S 2, S i-1, S i, S N-1, S N), and to an AC electric system, the input channel configuration being indicative of the physical connection status of the input channels, such as independent or parallel, characterized in that it comprises the following steps: a) selecting a reference input channel among said input channels; b) controlling said power converters so that an input current higher than a current threshold is set along said reference input channel and so that input currents lower than said current threshold are set along one or more remaining input channels different from said reference input channel; c) acquiring detection data indicative of input voltages (V 1, V 2, Vi-i, V i, V N-1, V N) of said input channels following a selective current feeding of said input channels obtained by controlling said power converters in such a way that said input channels are fed with currents having selected profiles or different growth rates; d) performing a comparison between the input voltages of said input channels based on said detection data, said comparison including calculating the voltage differences between the input voltages of said remaining input channels and the input voltage of said reference channel and comparing said voltage differences with predefined threshold values; e) executing a determination procedure to determine a configuration status of said input channels based on a behavior of the input voltages of said remaining input channels with respect to the input voltage of said reference channel, the configuration status of each input channel being determined by checking whether the input voltages of said remaining input channels decrease as the input voltage of said reference input channel. a) selecting a reference input channel among said input channels; b) controlling said power converters so that an input current higher than a current threshold is set along said reference input channel and so that input currents lower than said current threshold are set along one or more remaining input channels different from said reference input channel; c) acquiring detection data indicative of input voltages (V 1, V 2, Vi-i, V i, V N-1, V N) of said input channels following a selective current feeding of said input channels obtained by controlling said power converters in such a way that said input channels are fed with currents having selected profiles or different growth rates; d) performing a comparison between the input voltages of said input channels based on said detection data, said comparison including calculating the voltage differences between the input voltages of said remaining input channels and the input voltage of said reference channel and comparing said voltage differences with predefined threshold values; e) executing a determination procedure to determine a configuration status of said input channels based on a behavior of the input voltages of said remaining input channels with respect to the input voltage of said reference channel, the configuration status of each input channel being determined by checking whether the input voltages of said remaining input channels decrease as the input voltage of said reference input channel.