Huawei SUN2000-3.68K-LB0

The Huawei SUN2000‑3.68K‑LB0 is a single-phase hybrid string inverter for small to medium-sized PV systems in residential and small commercial environments. With 3,680VA AC nominal power, two MPP trackers, and a wide MPPT voltage range of 40–560V, it enables flexible string design, even with different roof orientations. The inverter supports DC input voltages up to 600V and is designed for a recommended DC generator capacity of around 5.5kWp. The integrated hybrid topology allows direct connection of high-voltage battery systems from the Huawei LUNA series. Comprehensive protection functions, passive cooling, and IP66 protection make the device suitable for permanent indoor and outdoor use. Using compatible communication dongles, the system can be integrated into central monitoring and energy management solutions.

• TechnologyThe SUN2000‑3.68K‑LB0 operates as a transformerless hybrid inverter with two independently operating MPP trackers. Each tracker can continuously handle high input currents, enabling the design of modern module strings with higher string currents. The maximum efficiency of 97.8% and the European efficiency of 96.8% reduce conversion losses in partial-load and full-load operation. Thanks to the integrated battery DC connection, high-voltage storage systems can be connected directly without additional DC coupling. Passive cooling via natural convection minimizes moving parts and increases long-term stability in continuous operation.
  
  Electrical design
  • Two MPPTs with 40–560V enable flexible string lengths and adaptation to different module types
  • Recommended DC input power up to approx. 5.5kWp for balanced AC/DC dimensioning
  • Maximum DC input voltage of 600V for safe string design in single-family and multi-family projects
  • Transformerless topology reduces losses and space requirements while maintaining high efficiency
• ConnectivityFor system integration, the inverter provides several communication interfaces. RS485 is integrated as standard and is used for stable connection to smart meters, energy management, and protection components. WLAN is included ex factory, while Ethernet and cellular connectivity are implemented via optional smart dongles. Via the FusionSolar platform, operating data, events, and performance indicators can be centrally analyzed. The connectivity enables both local commissioning and permanent remote access for maintenance and fault diagnosis in installer- or EPC-managed fleets.
  
  Interfaces & Monitoring
  • RS485 for smart meter, battery, and system communication in more complex installations
  • Integrated WLAN for fast commissioning and local parameterization
  • Ethernet or 4G via optional smart dongles for stable remote monitoring
  • Central system monitoring and service access via FusionSolar
• WarrantyThe inverter is supplied with a standard manufacturer warranty of 10 years. This duration covers the typical technical lifecycle in the residential segment and provides planning certainty for projects with a long-term operating perspective. The warranty can be combined with additional Huawei system components, provided these are appropriately certified and approved.
  
  Warranty scope
  • 10 years product warranty on the inverter
  • Designed for continuous grid and storage operation
  • No reduced warranty conditions for outdoor installation in accordance with protection class
• SustainabilityHuawei pursues a compact, material-efficient design with the SUN2000‑LB0 series. The low device weight of around 15kg reduces transport effort and installation time. Passive cooling lowers internal consumption and eliminates wear-prone fans. Additionally, the devices are designed for low night-time consumption. The manufacturer’s packaging and recycling concepts aim to reduce plastic content and improve the recyclability of electronic components.
  
  Resource efficiency
  • Passive cooling without fans reduces energy consumption and maintenance effort
  • Compact design reduces transport and installation effort
  • Low internal consumption outside feed-in times
  • Manufacturer-wide recycling and packaging optimization
• QualityThe IP66-rated housing reliably protects against dust and strong water jets, making the inverter suitable for indoor and outdoor installation. Integrated protection functions such as DC and AC surge protection type2 as well as AI-supported arc fault detection increase operational electrical safety. The design for ambient temperatures from –25°C to +60°C enables use in a wide range of climate zones.
  
  Operational safety
  • IP66 housing for permanent outdoor installation
  • AFCI arc fault detection to reduce fire risks
  • Comprehensive protection functions against overcurrent and overvoltage
  • Wide operating temperature range for stable performance
• ExpandabilityThe SUN2000‑3.68K‑LB0 is consistently designed for modular system expansion. It is compatible with Huawei Smart PV optimizers for module or string optimization as well as with the high-voltage storage systems of the LUNA series. Additional system components such as smart meters, SmartGuard, or energy management modules can further extend functionality up to backup power and load management applications. This makes the inverter suitable both for current basic concepts and future system expansions.
  
  System integration
  • Direct connection of Huawei LUNA high-voltage storage systems
  • Support for Smart PV optimizers for complex roof layouts
  • Expandable with backup and energy management components
  • Suitable for gradual system expansion without replacing the device