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Factory Direct SEI 14KW 16KW 18KW 3 Phase 220V Hybrid Inverter Supplier

SEI 14KW/16KW/18KW 3 Phase 220V Hybrid Inverters are built for high-capacity residential, commercial, and industrial solar energy systems. Featuring advanced three-phase power output and intelligent hybrid energy management, these inverters provide stable performance for large electrical loads and energy storage applications. With high PV input capability, multiple MPPT trackers, and seamless compatibility with lithium batteries and generators, the SEI Series delivers efficient energy conversion, reliable backup power, and flexible system expansion for demanding solar projects.

Power Range: 14KW / 16KW / 18KW
Battery Type: Lead-Acid Batteries / Lithium Batteries / User-defined
No. Of MPPT Trackers: 3
Protection Degree: IP65
Application: Commercial & Industrial Solar Systems
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Note: Please read the safety and installation manual before using the product. We reserve the right of finalinterpretation.

The specifications in this datasheet are subject to change without notice.

Features

  • 3 independent MPPT ports, up to 1.6 times the rated photovoltaic power.
  • AC coupling function.
  • PV open-circuit voltage is 600V, and the single-channel current is 40A.
  • Up to 9 units can be connected in parallel, forming a 162kW commercial and industrial system.
  • Support fast charging, Max. charging/discharging current is 330A.
  • Max. 200A Bypass Current (Grid).
  • Separate generator port.
  • With a dual activation function (grid or PV).
  • Smart load function.
  • Support time-slot function for peak-valley.
  • Three-phase input/output without N wire function.

Basic Parameters

MODELSEI-14K-UH3SEI-16K-UH3SEI-18K-UH3
AC Input/Output Data
Rated AC Input/Output Active Power14000W16000W18000W
Max. AC Input/Output Apparent Power15400VA17600VA19800VA
Rated AC Input/Output Current44.5A / 38.8A50A / 44.5A55.5A / 50A
Max. AC Input/Output Current44.5A / 38.8A50A / 44.5A55.5A / 50A
Peak Power (off-grid)28000VA32000VA36000VA
Power Factor Adjustment Range0.8 leading to 0.8 lagging
Rated Input/Output Voltage/Range120/208V, 0.85Un-1.1Un
Rated Input/Output Grid Frequency/Range60Hz / 40Hz-70Hz
Grid Connection Form3L+N+PE
THD<3% (of nominal power)
Battery Input Data
Battery TypeLead-Acid Batteries / Lithium Batteries / User-defined
Number of Battery Input2
Battery Voltage Range40V-60V
Max. Grid/Generator Charging Current300A
330A		350A
Max. Hybrid Charging Current300A
330A		330A350A
Max. Discharging Current300A330A350A
Charging Strategy for Li-ion BatterySelf-adaption to BMS
PV Input Data
No. of MPPT Trackers3
No. of Strings MPPT Tracker2+2+2
Max. PV Access Power28000W32000W36000W
Max. PV Input Power22400W25600W28800W
Rated PV Input Voltage450V
Max. PV Input Voltage600V
Start-up Voltage120V
Max. PV Input Current40A / 40A / 40A
Max. Input Short-Circuit Current50A / 50A / 50A
MPPT Voltage Range120V-500V
Grid/Generator Input
Input Voltage RangePhase voltage: 90V-140V, line voltage: 156V-243V
Input Frequency Range40Hz-70Hz
Max. Bypass Overload Current (Grid)200A
Efficiency
MPPT Tracking Efficiency99.90%
Max. Efficiency97.50%
CEC Efficiency97%
General Data
Parallel Capacity1~9 Units
Dimension860×480×313mm
Weight59Kg
Protection DegreeIP65
Operating Temperature-25~60℃, >45℃ Derate
Humidity0~100%
Cooling MethodHeat sink + intelligent air cooling
Noise<55dB
CommunicationRS485 / CAN / USB / Dry Contact
External Module (Optional)Wi-Fi / 4G Stick
CertificateUL1741-2021, UL1741SB, CSA C22.2 No 107.1-16, IEEE1547-2018 & 1547.1-2020, UL1741 CRD-PCS, UL1699B, CEC, SGIP, CSIP
Protection
PV Lightning ProtectionYesAnti-islanding ProtectionYes
Leakage Current DetectionYesInsulation Resistor DetectionYes
Output Overcurrent / Shorted ProtectionYesPV Input Reverse Polarity ProtectionYes
Overvoltage CategoryAC type III / DC type IIISurge protectionAC type III / DC type III

FAQs

1. What is the main difference between 14KW, 16KW, and 18KW models?

The primary difference is the total output capacity. The 14KW model is suitable for medium commercial systems, the 16KW model supports larger energy demands, while the 18KW model is designed for high-load commercial and industrial applications.

2. Which model is best for commercial three-phase power systems?

All three models are designed for three-phase applications, but the 18KW inverter is more suitable for projects with larger machinery, higher daily consumption, or multiple heavy electrical loads.

3. Are 14KW, 16KW, and 18KW inverters suitable for industrial solar projects?

Yes. Their three-phase output, high PV input capability, and intelligent energy management make them ideal for factories, warehouses, workshops, and other industrial solar energy systems.

4. Can the 14KW, 16KW, and 18KW models support large battery storage systems?

Yes. These hybrid inverters are designed to work with high-capacity lithium battery systems, making them suitable for advanced energy storage and backup applications.

5. Why choose a 16KW or 18KW hybrid inverter instead of a smaller system?

Larger inverter models provide stronger load capacity, greater scalability, and improved support for commercial equipment, helping reduce system limitations for future expansion.

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