The MPPT performance of Sepic-based solar charge controller is measured in the experimental setup, in which the energy source is a solar array simulator (SAS), and the data acquisition system (DAS) records the input and output data of the solar charge controller. The target solar panel is the STP070D-12/SEA from Suntech. The MPPT efficiency of the Sepic-based charger is calculated in terms of with the data sensed by the DAS. The static MPPT testing results are shown in Table 1, where the testing conditions include solar cell temperature and solar irradiance level. The dynamic testing data is at the same level as that of the static one, verifying the validity and feasibility of the MPPT control.