A device comprising: a single-phase DC/AC converter configured to be connected to a power line pair of a power grid, comprising: a first DC/AC conversion module that is configured to be operated by a pulse width modulator so as to perform a first energy extraction from a DC energy source of substantially fixed voltage, the first DC/AC conversion module configured to perform the first energy extraction within a first portion of a duty cycle of a pulse width modulator signal of the pulse width modulator to produce a first sinusoidal AC power train; and a second DC/AC conversion module that is configured to be operated by the pulse width modulator so as to perform a second energy extraction from the DC energy source, the second DC/AC conversion module configured to perform the second energy extraction within a second portion of a duty cycle of the pulse width modulator signal of the pulse width modulator to produce a second sinusoidal AC power train; wherein the second portion of the duty cycle is not overlapping with the first portion of the duty cycle, the second portion of the duty cycle being adjacent to the first portion of the duty cycle, so that the first energy extraction and the second energy extraction are sequential; characterized in that the single-phase DC/AC converter further comprises: a phase adjuster configured to adjust one of the first or second sinusoidal AC power trains by a 90 degree phase-shift such that both the first and second sinusoidal AC power trains have a same phase that is synchronized with the power line pair of the power grid. a single-phase DC/AC converter configured to be connected to a power line pair of a power grid, comprising: a first DC/AC conversion module that is configured to be operated by a pulse width modulator so as to perform a first energy extraction from a DC energy source of substantially fixed voltage, the first DC/AC conversion module configured to perform the first energy extraction within a first portion of a duty cycle of a pulse width modulator signal of the pulse width modulator to produce a first sinusoidal AC power train; and a second DC/AC conversion module that is configured to be operated by the pulse width modulator so as to perform a second energy extraction from the DC energy source, the second DC/AC conversion module configured to perform the second energy extraction within a second portion of a duty cycle of the pulse width modulator signal of the pulse width modulator to produce a second sinusoidal AC power train; a first DC/AC conversion module that is configured to be operated by a pulse width modulator so as to perform a first energy extraction from a DC energy source of substantially fixed voltage, the first DC/AC conversion module configured to perform the first energy extraction within a first portion of a duty cycle of a pulse width modulator signal of the pulse width modulator to produce a first sinusoidal AC power train; and a second DC/AC conversion module that is configured to be operated by the pulse width modulator so as to perform a second energy extraction from the DC energy source, the second DC/AC conversion module configured to perform the second energy extraction within a second portion of a duty cycle of the pulse width modulator signal of the pulse width modulator to produce a second sinusoidal AC power train; wherein the second portion of the duty cycle is not overlapping with the first portion of the duty cycle, the second portion of the duty cycle being adjacent to the first portion of the duty cycle, so that the first energy extraction and the second energy extraction are sequential; characterized in that the single-phase DC/AC converter further comprises: a phase adjuster configured to adjust one of the first or second sinusoidal AC power trains by a 90 degree phase-shift such that both the first and second sinusoidal AC power trains have a same phase that is synchronized with the power line pair of the power grid. <EOS>