Expert Reveals Top 3 Mistakes in VFD PB Settings For 480V PV Systemsbr br In this video, a VFD expert uncovers the top 3 most common and dangerous mistakes people make when configuring Push Button (PB) settings for 480V photovoltaic (PV) systems. If you're working with solar-powered VFDs, especially on industrial or agricultural setups, avoiding these mistakes can save you from costly damage and system failure.