Reference is now made to FIG. 2 which illustrates a distributed power harvesting circuit 20, based on the disclosure in U.S. application Ser. No. 11/950,271. Circuit 20 enables connection of multiple distributed power sources, for example solar panels 101a-101d, to a single power supply. Series string 203 of solar panels 101 may be coupled to an inverter 204 or multiple connected strings 203 of solar panels 101 may be connected to a single inverter 204. In configuration 20, each solar panel 101a-101d is connected individually to a separate power converter circuit or a module 205a-205d. Each solar panel 101 together with its associated power converter circuit 205 forms a power generating element 222. (Only one such power generating element 222 is marked in FIG. 2.) Each converter 205a-205d adapts optimally to the power characteristics of the connected solar panel 101a-101d and transfers the power efficiently from input to output of converter 205. Converters 205a-205d are typically microprocessor controlled switching converters, e.g. buck converters, boost converters, buck/boost converters, flyback or forward converters, etc. The converters 205a-205d may also contain a number of component converters, for example a serial connection of a buck and a boost converter. Each converter 205a-205d includes a control loop 221, e.g. MPPT loop that receives a feedback signal, not from the converter's output current or voltage, but rather from the converter's input coming from solar panel 101. The MPPT loop of converter 205 locks the input voltage and current from each solar panel 101a-101d at its optimal power point, by varying one or more duty cycles of the switching conversion typically by pulse width modulation (PWM) in such a way that maximum power is extracted from each attached panel 101a-101d. The controller of converter 205 dynamically tracks the maximum power point at the converter input. Feedback loop 221 is closed on the input power in order to track maximum input power rather than closing a feedback loop on the output voltage as performed by conventional DC-to-DC voltage converters.