Series 4100 Submeter, Outdoor Universal Voltage Bi-Directional 3-phase 3W/4W Modbus Submeter Kit (CTs included), (3) 18" Rogowski Current Transformers (CT) The VerifEye Series 4100 Bidirectional ModBus RTU and BACnet MS/TP Submeter Kits feature bidirectional monitoring specifically designed for renewable energy applications. The Series 4100 Meter Kits measure power imported from the utility grid and power exported from renewable energy sources like solar panels. The Series 4100 Meters are available in standalone DIN rail mount or a NEMA 4X enclosure. The 3-phase, advanced communication meter kits come with either split core or flexible rope-style Rogowski Current Transformers (CTs) for compact or irregularly shaped conductors.