AC 220V 400W Micro Inverter Single Phase Silver

The 400W Micro Inverter is designed as an on-grid tie MPPT micro solar inverter with an IP65 waterproof design. It provides a 230VAC output, an RS232 Port, and operates within a wide voltage range of 22-50VDC. Additionally, it features built-in Wi-Fi functionality.

This micro inverter, part of the GTB series, boasts a highly efficient MPPT engine, an intelligent Wi-Fi module, and multiple security measures for enhanced safety. Its installation is straightforward, and it ensures reliable performance. It can also seamlessly integrate with the latest smart home monitoring system (Smart Life app) to enable intelligent online monitoring and control for the Internet of Things (IoT).


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  • Outstanding Maximum Power Point Tracking (MPPT) for superior performance.
  • Capability for power transmission in the reverse direction.
  • Complete input and output isolation for enhanced electrical safety.
  • Accommodates stacking in multiple parallel configurations.
  • Utilizes a digital control system for precise management.
  • User-friendly maintenance, designed for easy user servicing.
  • Cost-effective operation and maintenance.
  • Adaptable installation options to suit various needs.



  • Provide eco-friendly and sustainable power to meet the electricity requirements of households.
  • Convert solar energy captured by solar panels into alternating current to meet the commercial electricity demands of shopping malls, factories, and various industrial facilities.
  • Support agricultural operations, such as supplying power for irrigation systems and livestock shelters.
  • Offer essential electricity assistance to individuals relying on electrical appliances.
  • Play a role in civil engineering projects, including road lighting systems.
  • Harness solar energy for lighting to enhance energy efficiency and reduce emissions.



Model GTB-400-S
Maximum input power 275-400W
Number of DC input connections (groups) MC4*1
Maximum DC input voltage 52V
Operating voltage range 20-50V
Start-up voltage 18V
MPPT Tracking Range 22-48V
MPPT Tracking accuracy >99.5%
Maximum DC input current 12
Rated power output 380W
Maximum output power 400W
Rated output voltage 230V
Output voltage range 190-270V
Rated AC current (at 230V) 1.73A
Rated output frequency 60Hz
Output frequency range (Hz) 58.9-61.9Hz
THD ﹤5%
Power factor ﹥99%
Maximum number of branch circuit connections @120VAC : 8 set / @230VAC : 16 set
Maximum conversion efficiency 94%
CEC efficiency 92%
Night losses <80mW
Protection Function
Over/under voltage protection Yes
Over/under frequency protection Yes
Anti-islanding protection Yes
Overcurrent protection Yes
Overload protection Yes
Over-temperature protection Yes
Protection class IP65
Working environment temperature -40℃ ~ +65℃
Indicator lights quantity Working status LED light *1 + Wifi signal led light *1
Communication connection mode WiFi/2.4G
Cooling method Natural cooling (no fan)
Working environment temperature Indoor and outdoor
Certification standards EN61000-3-2,EN61000-3-3,EN62109-2,EN55032,
General information
Dimensions(L*W*H) 253mm*200mm*40mm
Net Weight 1.2 kg