An apparatus configured for converting DC input power generated by a PV module to AC output power, comprising: means for storing energy from a DC input current; means for converting the DC input current to AC output current; means for causing (i) the energy to be stored in the means for storing the energy during at least one storage period, wherein the AC output current is not generated during the at least one storage period, and (ii) the energy to be drawn from the means for storing the energy during at least one burst period in order to converge towards a maximum power point, wherein the AC output current is greater than the DC input current during the at least one burst period; a first means for determining the MPP and operating the means for converting the DC input current to the AC output current proximate the MPP; characterized by a second means for determining a difference in a first power measurement and a second power measurement, producing an error signal indicative of the difference, and coupling the error signal to the first means to adjust at least one operating parameter of the means for converting the DC input current to the AC output current to drive toward the MPP, wherein the first power measurement is obtained during a first half of the at least one storage period and measures the DC input power by integrating power over a first phase range of at least one cycle of a commercial power grid and the second power measurement is subsequently obtained during a second half of the at least one storage period and measures the DC input power by integrating power over a second phase range of a same time duration length as the first phase range within the at least one cycle. means for storing energy from a DC input current; means for converting the DC input current to AC output current; means for causing (i) the energy to be stored in the means for storing the energy during at least one storage period, wherein the AC output current is not generated during the at least one storage period, and (ii) the energy to be drawn from the means for storing the energy during at least one burst period in order to converge towards a maximum power point, wherein the AC output current is greater than the DC input current during the at least one burst period; a first means for determining the MPP and operating the means for converting the DC input current to the AC output current proximate the MPP; characterized by a second means for determining a difference in a first power measurement and a second power measurement, producing an error signal indicative of the difference, and coupling the error signal to the first means to adjust at least one operating parameter of the means for converting the DC input current to the AC output current to drive toward the MPP, wherein the first power measurement is obtained during a first half of the at least one storage period and measures the DC input power by integrating power over a first phase range of at least one cycle of a commercial power grid and the second power measurement is subsequently obtained during a second half of the at least one storage period and measures the DC input power by integrating power over a second phase range of a same time duration length as the first phase range within the at least one cycle.