Eight MPPT Trackers
Two PV strings per tracker, 40A maximum input current per MPPT.
125kW Three-Phase On-Grid String Inverter
BSM125K-B
Eight-MPPT string inverter with 125kW AC output, up to 98.7% efficiency and IP66 enclosure protection.
125kWRated AC output8 MPPTIndependent trackers98.7%Maximum efficiency
Inverter overview
Eight-MPPT Conversion for Commercial PV
BSM125K-B converts PV power to three-phase AC with a nominal output of 125kW and maximum apparent output of 125kVA.
Eight independent MPPT trackers each accept two strings. The MPPT operating range is 200–1000V, with 1100V maximum DC input and a 350V start voltage.
High Conversion Efficiency
98.7% maximum efficiency and 98.3% Euro efficiency.
Grid Protection
Anti-islanding protection and Type II DC / AC surge protection.
Communication Options
RS485 / PLC, with optional Wi-Fi / 4G plug.
System integration
Build a Complete On-Grid Solar System
Explore the matching system series for PV modules, mounting and electrical accessories.
Complete On-Grid Solar System
BSM125KW-ON125 / 250kW systems with one or two 125kW invertersExplore On-Grid Solar System →AC Connection
230V / 400V · three-phase
PV Inputs
Eight independent MPPT trackers
Monitoring
RS485 / PLC · optional Wi-Fi / 4G
View Inverter Scope +
- Inverter · 1 unit
- BSM125K-B · 125kW
- AC connection · Three-phase
- 230V/400V, 3W+PE or 3W+N+PE
- Battery connection · None
- PV on-grid string inverter
Technical specifications
Technical Specifications
Inverter ratings below apply to each BSM125K-B unit.
- Inverter model
- BSM125K-B
- Nominal AC output
- 125kW
- Maximum apparent output
- 125kVA
- Nominal AC voltage
- 230V/400V, 3W+PE, 3W+N+PE
- Maximum output current
- 181.2A
- Grid frequency
- 50 / 60Hz (±5Hz)
- Power factor
- 0.8 leading to 0.8 lagging
- THDi
- <3% at nominal power
- Maximum efficiency
- 98.7%
- Euro efficiency
- 98.3%
- Maximum DC voltage
- 1100V
- Nominal DC voltage
- 650V
- Start voltage
- 350V
- MPPT voltage range
- 200–1000V
- MPPT trackers
- 8
- Strings per MPPT
- 2
- Maximum input current per MPPT
- 40A
- Maximum short-circuit current per MPPT
- 60A
- Dimensions (W × H × D)
- 965 × 700 × 355mm
- Weight
- 85kg
- Operating temperature
- -30 to +60°C
- Cooling
- Fan cooling
- Maximum altitude
- 5000m; derating above 4000m
- Humidity
- 0–100%
- Enclosure protection
- IP66
- Noise
- ≤75dB
- Topology
- Transformerless
- Communication
- RS485 / PLC / Wi-Fi / 4G
- Display
- LED, Bluetooth + app
- DC switch
- Yes
- Anti-islanding protection
- Yes
- Output overcurrent protection
- Yes
- DC reverse polarity protection
- Yes
- String fault detection
- Optional
- DC / AC surge protection
- Type II
- AC short circuit protection
- Yes
- AFCI
- Optional
- Night SVG
- Optional
- PID recovery
- Optional
- Insulation detection
- Yes
- Residual current monitoring
- Yes
Product resources
Inverter Datasheet
Original BSM125K-B inverter catalog spread, including PV input, AC output, protection and general specifications.
Product FAQ
Your questions, answered.
Inverter ratings, PV inputs and system integration.
What is the rated output?+
BSM125K-B has 125kW nominal AC output and 125kVA maximum apparent output.
How many MPPT trackers are available?+
Eight MPPT trackers, with two strings per MPPT. Maximum input current is 40A and short-circuit current is 60A per MPPT.
Which functions are optional?+
String fault detection, AFCI, night SVG and PID recovery are optional in the catalog. Wi-Fi / 4G plug is also optional.
Does it connect to a battery?+
No. BSM125K-B is a PV on-grid string inverter without a battery connection.
Can it be used in a 250kW system?+
The linked BSM125KW-ON system offers a 250kW AC configuration using two 125kW inverters, subject to project electrical design and grid requirements.
Product inquiry
Select Your Three-Phase String Inverter
Tell us your required AC rating, PV string design, grid voltage and monitoring needs.
125kW Three-Phase On-Grid String Inverter
Model: BSM125K-B Category: Solar Inverter