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1. An energy-converting system comprising a set of at least one load and an inverter comprising transistors, the inverter being intended to convert a DC voltage into an AC voltage that is intended to electrically power the set of at least one load, the inverter being able to be in a set of states comprising a nominal regime and a transitory regime, the set of at least one load drawing, in transitory regime, from the inverter, a power higher than a preset maximum power, the set of at least one load drawing, from the inverter in nominal regime, a power lower than or equal to the preset maximum power, the energy-converting system comprising means for cooling the transistors comprising a holder that is joined to a set of at least one of the transistors of the inverter, the holder comprising a phase-change material, the energy-converting system being configured so that, at a preset ambient temperature, the phase-change material melts when the inverter is in the transitory regime and so that, at the preset ambient temperature, the phase-change material does not melt when the inverter is in the nominal regime, the holder comprising a casing enclosing the phase-change material in a seal-tight manner, the casing being interposed between the set of at least one of the transistors of the inverter and a radiator comprising fins in direct physical contact with the surrounding air.
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