A control method for double-stage inverters comprising an input stage provided with at least one input channel connected to at least one photovoltaic generator and comprising at least one booster module, an output stage in turn comprising an inverter module, an energy storage module, associated with said input and output stages so as to form the load and supply, respectively, and a control module adapted to adjust the operation of said apparatus in MPPT (Maximum Power Point Tracking) mode, characterized in that said control method comprises the following steps: a) calculating the minimum input voltage value (V bulkmin) required by said inverter module; b) selecting a first reference voltage value for said inverter module (V bulkRefInverter) so that it is greater than or equal to said minimum input voltage value (V bulkmin); c) for each of said at least one input channel, selecting the reference voltage value for said booster module (V bulkRefboost) so that it is greater than or equal to said first reference voltage value for said inverter module (V bulkRefInverter); d) for each of said at least one input channel, calculating the reference value for the input voltage of said booster module according to the MPPT mode; e) selecting the highest (V in) of the reference values for the input voltage of said booster module calculated in the preceding step; f) calculating a second reference voltage value (V intot) for said inverter module based on the value selected in the preceding step, such as said second reference voltage value (V intot) is greater than or equal to Vin; g) if said booster module is switched on, checking the value of said second reference voltage value (V intot) with respect to the value of said reference voltage for said booster module (V bulkRefboost), increased by a first hysteresis value Δ1 and, if said second reference voltage value (V intot) is greater, switching off said booster module, otherwise letting it operate; h) if said booster module is switched off, checking the said second reference voltage value (V intot) with respect to the value of said reference voltage for said booster module (V bulkRefboost), decreased by a second hysteresis value Δ2; if said second reference voltage value (V intot) is smaller, switching on said booster module, otherwise leaving it in the switched off status. a) calculating the minimum input voltage value (V bulkmin) required by said inverter module; b) selecting a first reference voltage value for said inverter module (V bulkRefInverter) so that it is greater than or equal to said minimum input voltage value (V bulkmin); c) for each of said at least one input channel, selecting the reference voltage value for said booster module (V bulkRefboost) so that it is greater than or equal to said first reference voltage value for said inverter module (V bulkRefInverter); d) for each of said at least one input channel, calculating the reference value for the input voltage of said booster module according to the MPPT mode; e) selecting the highest (V in) of the reference values for the input voltage of said booster module calculated in the preceding step; f) calculating a second reference voltage value (V intot) for said inverter module based on the value selected in the preceding step, such as said second reference voltage value (V intot) is greater than or equal to Vin; g) if said booster module is switched on, checking the value of said second reference voltage value (V intot) with respect to the value of said reference voltage for said booster module (V bulkRefboost), increased by a first hysteresis value Δ1 and, if said second reference voltage value (V intot) is greater, switching off said booster module, otherwise letting it operate; h) if said booster module is switched off, checking the said second reference voltage value (V intot) with respect to the value of said reference voltage for said booster module (V bulkRefboost), decreased by a second hysteresis value Δ2; if said second reference voltage value (V intot) is smaller, switching on said booster module, otherwise leaving it in the switched off status.