Grid Tie Inverter MPPT range: 30V – 39V. If the DC connection is loose and causes a short circuit, then smoke may be emitted. The inverter adopts aluminum alloy casing, so there is no fire. Solar Grid Tie Inverter – Vmp(of a solar panel) must be in the MPPT range to ensure the good output efficiency Grid Tie Solar Inverter – Creative MPPT tech makes efficiency higher than 99%.