For ET (15-30kW) or HT series inverters onsite without CTs [needs 5A secondary CT suitable]This component is essential for ET (1530kW) or HT series inverters used without default CTs. Requires a 5A secondary CT for proper export limitation and consumption monitoring. Key Features: Works with ET and HT inverters 5A secondary CT required Ensures compliance with export limitation Enhances monitoring and control accuracy