In high power CPT system, there are high voltage stresses on capacitors, resulting in safety issues, high cost and power losses. To resolve this problem, a parameter design method is proposed in this paper to optimize all capacitor voltage stresses, including coupler and all compensation capacitors, for LCLC-LC compensated CPT system. Meanwhile, approximately constant voltage output (CV) and zero phase angle between the input voltage and input current (ZPA) characteristics are realized. To verify this method, a 1-kW design example is given and built, at a dc–dc efficiency of 80.1%.