This paper presents the DC analysis of the Negative Output Elementary Luo Converter (NOELC), which includes the continuous-conduction mode (CCM) voltage gain and the boundary condition between the CCM and the discontinuous-conduction mode (DCM). The main features of the NOELC are the high gain with small ripple and the reverse output. Additionally, we address the parameters design of the NOELC and propose an output voltage ripple estimation method. Through MATLAB Simulink simulation, we further demonstrate that the parameters design and the output voltage estimation method can achieve more accurate results when compared with those from the conventional one.