Dual MPPT
Two trackers with a 140–1000V operating range.
15–25kW Three-Phase On-Grid String Inverter
BSM15-25K-B
Dual-MPPT string inverter with up to 1100V DC input, 98.6% maximum efficiency and IP66 enclosure protection.
15–25kWRated AC output2 MPPTIndependent trackers98.6%Maximum efficiency
Inverter overview
Dual-MPPT Conversion for Three-Phase PV
The BSM15-25K-B series converts solar DC power to 400V three-phase AC. Select BSM15K-B, BSM17K-B, BSM20K-B or BSM25K-B for nominal outputs of 15, 17, 20 or 25kW.
Two MPPT trackers operate over a 140–1000V range, with 1100V maximum DC input. An IP66 enclosure, fan cooling and LCD display support operation and commissioning.
High Conversion Efficiency
98.6% maximum efficiency across the series.
Grid Protection
Anti-islanding, reverse polarity and overcurrent protection.
Communication
RS485 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
BSM15-25KW-ONPV modules, mounting and site-specific electrical accessoriesExplore On-Grid Solar System →AC Connection
400V three-phase · 3L+N
PV Inputs
Two independent MPPT trackers
Monitoring
RS485 · optional Wi-Fi / 4G
View Inverter Scope +
- Model range · 4 variants
- BSM15K-B / BSM17K-B / BSM20K-B / BSM25K-B
- Nominal grid voltage · 400V
- 3L+N
- Battery connection · None
- PV on-grid string inverter
Technical specifications
Compare the Four Inverter Models
Select an output rating to view model-specific data. Common specifications apply to the inverter series.
- Model
- BSM15K-B
- Nominal AC output
- 15000W
- Maximum AC output
- 16500VA
- Maximum output current
- 23.9A
- Nominal AC voltage
- 400V 3L+N
- MPPT trackers
- 2
- Strings per MPPT
- 2 / 1
- Maximum input current per MPPT
- 30A / 15A
- Maximum short-circuit current per MPPT
- 40A / 20A
- Maximum efficiency
- 98.6%
- Euro efficiency
- 98.2%
- Model
- BSM17K-B
- Nominal AC output
- 17000W
- Maximum AC output
- 18700VA
- Maximum output current
- 27.1A
- Nominal AC voltage
- 400V 3L+N
- MPPT trackers
- 2
- Strings per MPPT
- 2 per MPPT
- Maximum input current per MPPT
- 30A
- Maximum short-circuit current per MPPT
- 40A
- Maximum efficiency
- 98.6%
- Euro efficiency
- 98.3%
- Model
- BSM20K-B
- Nominal AC output
- 20000W
- Maximum AC output
- 22000VA
- Maximum output current
- 31.9A
- Nominal AC voltage
- 400V 3L+N
- MPPT trackers
- 2
- Strings per MPPT
- 2 per MPPT
- Maximum input current per MPPT
- 30A
- Maximum short-circuit current per MPPT
- 40A
- Maximum efficiency
- 98.6%
- Euro efficiency
- 98.3%
- Model
- BSM25K-B
- Nominal AC output
- 25000W
- Maximum AC output
- 27500VA
- Maximum output current
- 39.9A
- Nominal AC voltage
- 400V 3L+N
- MPPT trackers
- 2
- Strings per MPPT
- 2 per MPPT
- Maximum input current per MPPT
- 30A
- Maximum short-circuit current per MPPT
- 40A
- Maximum efficiency
- 98.6%
- Euro efficiency
- 98.3%
- Maximum DC voltage
- 1100V
- Nominal DC voltage
- 620V
- Start voltage
- 250V
- MPPT voltage range
- 140–1000V
- Grid frequency
- 50 / 60Hz (±5Hz)
- Power factor
- 0.8 leading to 0.8 lagging
- THDi
- 3%
- Dimensions (W × H × D)
- 380 × 483 × 193mm
- Weight
- 20.7kg
- Operating temperature
- −25 to +60°C
- Cooling
- Fan cooling
- Maximum altitude
- 4000m
- Humidity
- 0–100%, non-condensing
- Topology
- Transformerless
- Enclosure protection
- IP66 (inverter)
- Communication
- RS485 / Wi-Fi / 4G
- Display
- LCD
- Surge protection
- DC Type II; AC Type III, Type II optional
- Anti-islanding protection
- Yes
- DC switch
- Yes
Product resources
Inverter Datasheet
The original BSM15-25K-B catalog spread, including features and specifications for all four inverter models.
Product FAQ
Your questions, answered.
PV input, model selection and product integration.
How do the four models differ?+
Nominal AC output is 15, 17, 20 or 25kW. Maximum output current and the 15kW model’s PV input arrangement differ; see the model tabs.
What are the PV input limits?+
Maximum DC voltage is 1100V, start voltage is 250V and the MPPT operating range is 140–1000V. Current limits vary by model.
What protection rating does the inverter have?+
The inverter enclosure is rated IP66. The operating temperature range is −25 to +60°C.
Does this inverter have a battery input?+
No. This model is a PV on-grid string inverter, without a battery connection.
Can I order a complete PV system?+
Yes. Open the linked BSM15-25KW-ON on-grid system page to review the system scope and request project-specific PV module and accessory selection.
Product inquiry
Select Your Three-Phase String Inverter
Tell us your required AC rating, PV string design, grid voltage and monitoring needs.
15–25kW Three-Phase On-Grid String Inverter
Model: BSM15-25K-B Category: Solar Inverter