configured to switch the switches periodically at a frequency sufficiently high so that direct currents flowing through the inductive elements are substantially zero a direct current voltage output is connected across one of the dc voltage inputs and a common reference to both the inputs and the output application_number US 201514601595 A description reference will now be made in detail to embodiments of the present invention examples of which are illustrated in the accompanying drawings wherein like reference numerals refer to the like elements throughout the embodiments are described below to explain the present invention by referring to the figures by way of introduction different embodiments of the present invention are directed toward compensating for current variations in multiple junctions cells or in serially connected photovoltaic cells and or panels such as during partial shading while maximizing power gain by avoiding the loss of power from one or more photovoltaic cells and or panels shorted by the cells and or panels respective bypass diode reference is now made back to fig3 which illustrates conventionally multiple multi junction cells 30 connected in series each with multiple serially connected photovoltaic junctions 300 302 and 304 it is well known that the spectrum of solar irradiance on the earth 39 s surface is not a constant but varies according to many variables such as season geographic location time of day altitude atmospheric conditions and pollution hence it becomes apparent that photovoltaic junctions 300 302 and 304 sensitive to different spectrum bands may be absorbing a different amount of light depending on season geographic location time of day altitude atmospheric conditions and pollution since.