Product Name: 1-10kw Solar Power System 4kw Solar Inverter Model NO.: SSP3115C 1-10kw Nature of Wave String: Sine Wave Inverter Circuit Topologies: Half-Bridge Type Power Source: Solar Power Type: DC/AC Inverters Brand: Sorotec Certification: CE, ISO9001 Output Power: 1-10kw Phase: Single Nature of Source Flow: Passive inverter Input Wave Form: Sine Wave (Utility or Generator) Nominal Input Frequency: 50Hz/ 60Hz (Auto Detection) Output Wave Form: (Bypass Mode)Same as Input Efficiency on Line Transfer Mode: >95% Line Transfer Time: 10ms Typical Bypass Without Battery Connected: Yes Output Frequency: 50Hz