Micro Grid Tie Inverter GTB400 400W Micro Inverter Compact, durable microinverter designed for gridconnected solar panels with selectable AC output for 120V or 230V systems. Ideal for rooftop solar power generation where panellevel maximum power point tracking and safe, reliable conversion are priorities. Key benefits Maximizes panel output: Builtin MPPT (maximum power point tracking) optimizes power harvest from each panel and helps reduce power loss from partial shading. Safer, lowervoltage operation: Microinverter architecture avoids very DC voltages associated with long series strings, improving system safety and simplifying installation. Flexible system expansion: Add panels one at a time without resizing a central inverter. Each unit operates independently, making expansion and maintenance easier. Durable for outdoor use: Aluminum alloy housing and IP65rated connector provide water resistance and strong resistance to shock and UV exposure for outdoor roof installations. Clean, stable AC output: Pure sine wave output generated with speed SPWM processed by an onboard microprocessor for reliable gridtied operation. Features Integrated solar charge controller with MPPT for optimized panel performance. Full galvanic isolation between DC input and AC output for improved reliability. precision electronic components delivering consistent output power. IP65 waterproof connector with strength, shock resistance, and UV resistance. Pure sine wave AC output using speed SPWM control. Technical specifications (GTB400) Model: GTB400 Material: Aluminum alloy plus electronic components Weight: 2.5 kg Maximum input power: 400 W MPPT tracking voltage: 22 to 50 V Recommended DC operating range: typically 18 to 60 V (MPPT and startup 22 to 50 V) Minimum/maximum starting voltage: 22 to 50 V Maximum DC shortcircuit current: 20 A Maximum input operating current: 18 A Output settings: selectable 120 V or 230 V Maximum output power: 400 W Rated output power: 400 W Rated output current: 3.3 A at 120 V, 1.7 A at 230 V Rated voltage range: 80 to 160 VAC (for 120 V setting), 180 to 280 VAC (for 230 V setting) Rated frequency range: 48 to 51 Hz or 58 to 61 Hz Number of units per string: up to 6 units for 120 V, up to 12 units for 230 V What is included 1 x microinverter (GTB400) 1 x connection cable 1 x accessory pack 1 x instruction manual Typical applications Residential rooftop solar panels where perpanel optimization reduces shading losses and simplifies system scaling. Small commercial roof installations or carport arrays where independent panel operation improves uptime and maintenance flexibility. Portable or semipermanent gridtied solar setups on structures with moderate DC voltage ranges. Installation notes Confirm DC panel voltage and current remain within the specified MPPT and input current limits. Select the appropriate AC output setting (120 V or 230 V) to match local grid requirements. Observe the recommended maximum number of units per string to ensure stable grid connection and performance. This GTB400 microinverter offers a compact, durable, and easytoexpand solution for gridtied solar installations where panellevel optimization, lower DC system voltage, and reliable AC output are important.