<p>This paper proposes a new single-switch high step-up dc-dc converter with zero input current ripple and soft-switching characteristics applied in new energy generation systems. The converter achieves high voltage gain by integrating coupled inductor with voltage multiplier cell and offers flexible voltage gain design while avoiding extreme duty cycle operation. The zero-ripple unit significantly reduces input current ripple and improves electromagnetic compatibility performance. It also achieves ZVS turn-on for the switch in a certain load range. In addition, all diodes achieve ZCS turn-off, which greatly improves the efficiency. Furthermore, the combined use of passive clamping and switched-capacitor techniques simultaneously alleviates device voltage stress and enhances voltage gain, thus MOSFETs with low on-state resistance and low voltage levels can be selected to reduce system costs. The operational principle analysis and modal description of the converter is presented. Then a comparison with other similar converters explains the superiorities of the proposed converter. Finally, a 100W laboratory prototype was implemented, achieving a measured efficiency of 96.5%. The ripple ratio of input current was only 3%, realizing zero ripple characteristics. Experimental waveforms also verified the accuracy of the theoretical analysis and excellent dynamic performance of the converter.</p>