In applications wherein variations in temperature significantly affect performance, temperature compensation, such as adjustment of the reference voltage to an integrator, may be provided so that maximum power transfer is achieved over the full temperature range of operation. Like other semiconductor devices, solar cells are sensitive to temperature. Increases in temperature reduce the band gap of a semiconductor, thereby effecting most of the semiconductor material parameters. In a semiconductor-based photovoltaic solar cell for example, the parameter perhaps most significantly affected by an increase in temperature is the open-circuit voltage. The net effect is a reduction in the open-circuit voltage more-or-less linearly with increasing temperature. The magnitude of this reduction is inversely proportional to open circuit voltage; that is, cells with higher values of open circuit voltage suffer smaller reductions in voltage with increasing temperature. For silicon-based solar cells the reduction is about 0.15%/° C. to 0.5%/° C. or more, depending on the construction of the cell. Thus, for example, overall efficiency may be increased by adjusting the reference voltage of a voltage regulator in response to changes in solar cell temperature.