NOVELTY - The solar tracker (202) has a support structure to be angularly repositioned with respect to the sun, and one or more heat exchangers (206) supported by the support structure. Each heat exchanger is configured to be joined in thermal communication with at least one heat pipe (114) of a solar panel (102). At least one of the heat exchangers is characterized by an internal cavity (210) and configured to reject heat by a fluid flow through the internal cavity.    USE - Solar tracker with heat rejection for solar energy system (claimed), such as concentrating solar energy systems that use various optical elements such as lenses or reflectors to concentrate photonic energy i.e., sunlight onto photovoltaic (PV) cells.    ADVANTAGE - The solar energy system can operate in an ongoing manner so as to generate electrical energy by way of the PV cells, while rejecting heat by way of the heat pipes and heat exchangers, since heat pipes convey or transfer heat energy away from the PV cells to respective ones of the heat exchangers, in turn, the heat exchangers reject the heat to the ambient environment by way of the heat dissipation fins. The system can operate in continuous or steady-state manner, generating electrical energy and rejecting heat, since the heat pipes convey or transfer heat energy away from the PV cells to respective ones of the heat exchangers, in turn, each heat exchanger rejects heat to a flow of fluid coolant through the corresponding internal cavity. The tracking mechanism continuously or incrementally repositions the solar panel so as to maintain (about) optimum orientation with respect to the sun, thus system can operate in a continuous manner during daylight hours, resetting itself for operation during another daily cycle. Heat is ultimately rejected to the ambient environment by way of heat dissipation fins born on the outside surface of the heat exchangers, thus heat is rejected from the PV cells to the environment providing for sustained operation under concentrated solar energy exposure.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a solar energy system.    DESCRIPTION OF DRAWING(S) - The drawing shows has a solar energy system.    Solar panel (102)    Heat pipe (114)    Solar tracker (202)    Heat exchangers (206)    Internal cavity (210)