Smart Micro Inverter- Wireless Communication With Wifi Monitoring. Features: Wireless Communication 433/462MHz 6-grade Power Search--- Wide Voltage Input(22-50VDC)--- DC Voltage Input:22~50VDC; Second Level Power Variable Voltage Conversion. High-frequency Two-way and One-way Grid Function--- High Frequency Direct Modulation, AC Half Wave Synthesis; Two-way Grid Means: Load Consume Directly. And Can Reverse AC Current Transmission. Kinds of Frequency Output Function--- It Can Apply to 50Hz and 60Hz Frequency of AC; Frequency Range:48-51/58-61Hz; Directly Connected to the Solar Panels (do Not Need to Connect the Battery) AC 0 Angle with High Precision Auto-detection--AC Switching: 50Hz / 60Hz. Synchronous High-frequency Modulation Pure Sine Wave Output--- Specifications: Output Current: 3.3A/1.7A Output Frequency: 48-51/58-61Hz Output Power: 301 - 400W Output Type: Single Weight: 1.5kg Size: 253mm*200mm*40mm Is Smart Device: Yes Model Number: GTB-400 Recommended I nput Power: 400Watt Min / Max Start Voltage: 22-50V Maximum Input Operating Current: 13A Peak Power Tracking Voltage: 22-55V Waterproof Rating: IP65 Cooling: Self-cooling Max DC Short-circuit: 20A Output Voltage Range: 80-160VAC,180-260VAC,Optional Package Include: 1 X Smart Micro Inverter GTB-400 . GTB-800 Smart Micro Inverter Smart Grid Inverter Maximum Output 800W Smart APP Phone Monitoring Package Included: - 1 x Set of Smart Micro Inverter