Both Tigo Energy and IMO Automation have rapid shutdown devices for panels that have received UL PVRSS (Photovoltaic Rapid Shutdown System) certification. With the certification of an additional 30 inverter models, Tigo, who has the largest number of certified inverters in the marketplace, now has a whopping 200 inverters from 17 brands. IMO Automation received the certification for several of its FIMER UNO and FIMER PVS range of inverters. To nab the certification IMO had to develop an additional capacitance bleed circuit to disperse stored current when rapid shutdown is initiated.