The AC output terminals of the inverter supply the Neutral to Ground connection, and no secondary grounding connections are permitted. This document does not replace any regional, state, provincial, federal or national laws, regulations or standards that apply to the installation, electrical safety. The photovoltaic inverter has two grounding ports - Solar Pro. 15) PV circuits having 30V or 8A more shall be provided For 4. 0. Ungrounded or floating is now common with transformerless inverters, which rely on ground-fault detection interrupters (GFDI) for safety. Mismatched grounding leads to warranty voids and potential hazards. However, the grounding process and methods differ slightly, offering multiple options, such as separate grounding or combined grounding.