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To be able to make a Hybrid inverter from your exiting SE3K-RWBTEBEN4 one you need some extra units. Now will be up to you if you will make this choice or rather will buy a hybrid inverter.
You will need:
SolarEdge 5kW Hybride 1-Phase HD Wave (No Display) StorEdge SE5000H-RWSACBNN4
SolarEdge Inline Energy Meter with Energy Net, 1PH/3PH 230/400V, 65A
SolarEdge 100A Split Core Power Transformer SECT-SPL-100A-A
SolarEdge 10kWh Energy Bank Home Battery