SPI125K-B 125 kW 3F Kehua inverter

SPI125K-B 125 kW (on-grid) is a three-phase photovoltaic inverter from the SPI-B series designed for commercial and industrial installations. The device converts direct energy from PV fields into three-phase alternating energy and feeds it into the grid, offering a high input voltage range, multi-channel MPPT, and advanced protective and communication features.

About the manufacturer

Design and production: Kehua Data Co., Ltd. (Kehua Tech). The company is based in Xiamen, Fujian, China, and offers solutions in power electronics and energy management systems, including photovoltaic inverters from the SPI series.

Key electrical parameters

• Max. PV input voltage: 1,100 V
• Start voltage / minimum input voltage: 200 V / 250 V
• Nominal input voltage: 585 V
• MPPT range: 200 V to 1,000 V
• MPPT configuration: 9 MPPT channels (6 channels optionally)
• Max. input current per MPPT: 9 × 30 A (optionally 6 × 40 A)
• Max. short-circuit current CC: 9 × 50 A (optionally 6 × 50 A)
• Nominal output power: 125 kW
• Max. output power: 137.5 kW
• Grid voltage (output): 3/N/PE, 230 V / 400 V (three-phase operation)
• Grid voltage range: 320 V to 460 V
• Frequency: 50 Hz / 60 Hz (operating range 45–55 Hz or 55–65 Hz)
• Nominal output current: 180.5 A
• Max. output current: 198.5 A
• Power factor: >0.99 (at nominal power); adjustment in the range ±0.8
• THD (total harmonic distortion): <3% (at nominal power)
• DC component (direct current) at output: <0.5% of input
• Max. efficiency: ~98.7%

Mechanical and environmental parameters

• Dimensions (W × H × D): 1,030 mm × 610 mm × 345 mm
• Weight: 80 kg
• Protection class: IP66 (suitable for outdoor installation)
• Mounting method: wall mounting
• Cooling: intelligent air cooling system
• Operating temperature range: -35 °C to +60 °C
• Working humidity: 0–100%
• Max. operating altitude: 4,000 m (above 3,000 m with nominal power reduction)
• Display and local interface: LED, Bluetooth + app (APP)
• Communication interfaces: RS485; optionally GPRS / WI-FI; supports PLC (option)
• DC input terminal type: MC4
• AC output terminal type: OT terminal (max cross-sectional area of cable up to 240 mm²)
• Self-consumption at night: <2 W