The output power of photovoltaic（PV）battery varies with enviranment

so the maximum power point tracking（MPPT）technique is applied to PV systems to obtain the maximum power output.A MPPT technology combining working mode of wireless sensor networks（WSNs）nodes and character of PV system is proposed

based on WSNs.Temperature measurement working modes of WSNs node is used to compensate temperature for the shortcoming of open-circuit voltage method.The impedance matching algorithm is proposed to reduce the power oscillation around maximum power point（MPP）.The simulation results demonstrate the feasibility and effectiveness of the method.