This document compares the H5 and HERIC transformerless inverter topologies used in photovoltaic systems for their leakage current and efficiency. It finds that the HERIC topology has lower conduction losses than the H5 topology due to differences in switching behavior. The HERIC topology also produces less leakage current than the H5. Both topologies require similar sized filters to cancel output harmonics. In conclusion, the HERIC topology performs better in terms of losses and leakage current reduction compared to the H5 topology for photovoltaic inverters.