Solis 125kW S6-GC125K Three Phase On-Grid Inverter – Overview
The Solis 125kW S6-GC125K Three Phase On-Grid Inverter is a high-performance, three-phase grid-tied inverter from the S6-GC Series, engineered for large-scale commercial and utility-scale solar installations. It supports up to 187.5kW maximum PV input, 10 MPPT trackers with 20 strings, 42A/36A per MPPT, and delivers a maximum efficiency of 98.7%. With advanced features like AFCI protection, intelligent string monitoring, smart I-V curve scan, primary/secondary export power control, and optional nighttime PID recovery, it ensures safe, reliable, and intelligent power generation. Its IP66 rating and intelligent fan-cooling make it suitable for demanding outdoor installations across Bangladesh.
Key Benefits
- 125kW nominal output power with 125kW maximum output power.
- 187.5kW maximum PV input, supporting >150% DC/AC ratio for higher energy yield.
- Maximum efficiency of 98.7% and EU efficiency of 98.3%.
- 10 MPPT trackers with 20 strings and up to 42A max input current per MPPT.
- String current up to 21A, perfectly matching large current bifacial modules.
- Integrated AFCI protection to proactively reduce fire risk.
- Intelligent string monitoring and smart I-V curve scan for precise diagnostics.
- Primary/secondary export power control supporting up to 10 units in parallel.
- Dual independent RS485 ports for perfect adaptation to third-party integration.
- Supports single and multiple genset applications without an external genset controller.
- Supports export power control (zero export) for grid compliance.
- 24-hour load consumption monitoring capability.
- Optional nighttime PID recovery function for enhanced panel longevity.
- IP66 ingress protection for reliable outdoor installation.
- Intelligent fan-cooling for optimal thermal management.
- 5-year official warranty (extendable to 20 years).
This inverter is suitable for solar panels and can be connected to the utility grid to build a dependable three-phase on-grid solar energy system for commercial and industrial use.
Technical Specifications
| Parameter |
Value |
| Input (DC) |
| Max. DC input voltage |
1100 V |
| Rated DC voltage |
600 V |
| Start-up voltage |
180 V |
| MPPT voltage range |
160…1000 V |
| Max. input current |
42A/36A per MPPT |
| Max. short circuit current of each MPPT |
50 A |
| MPPT number/Max input strings number |
10/20 |
| Output (AC) |
| Rated output power |
125000 W |
| Max. output power |
125000 W |
| Max. apparent output power |
125000 VA |
| Rated grid voltage |
3/N/PE, 220/380, 230/400 V |
| Rated grid output current |
189.9/180.4 A |
| Max. output current |
189.9 A |
| Power Factor (at rated output power) |
0.8leading~0.8lagging |
| THDi (at rated output power) |
<3% |
| Rated grid frequency |
50/60 Hz |
| Efficiency |
| Max. efficiency |
98.7% |
| EU efficiency |
98.3% |
| Protection |
| DC reverse-polarity protection |
Yes |
| Short circuit protection |
Yes |
| Output over current protection |
Yes |
| Surge protection |
DC Type II / AC Type II |
| Grid monitoring |
Yes |
| Anti-islanding protection |
Yes |
| Temperature protection |
Yes |
| Strings monitoring |
Yes |
| I/V Curve scanning |
Yes |
| Multi peak scan |
Yes |
| Integrated AFCI 2.0 |
Optional |
| Integrated PID recovery |
Optional |
| Integrated DC switch |
Yes |
| General Data |
| Dimensions (W*H*D) |
1014*567*345 mm |
| Weight |
96 kg |
| Topology |
Transformerless |
| Self-Consumption (night) |
<2 W |
| Operating ambient temperature range |
-30°C…+60°C |
| Relative humidity |
0~100% |
| Ingress protection |
IP66 |
| Cooling concept |
Intelligent fan-cooling |
| Max. operation altitude |
4000 m |
| Certification |
| Grid connection standard |
G99, IEC61727, EN50549-1/2, VDE4110 |
| Safety/EMC standard |
IEC/EN 62109-1/-2, IEC/EN 61000-6-2/-4 |
| Features |
| DC connection |
MC4 connector |
| AC connection |
OT Terminal (max 240 mm²) |
| Display |
LCD, 2×20 Z |
| Communication |
RS485, Optional: Wifi, GPRS, PLC |
Ports & Interface Details
- DC Input: 10 pairs of MC4 connectors for 10 MPPT trackers (20 strings total).
- AC Output: OT Terminal connection (max 240 mm²).
- RS485 Communication: Dual independent RS485 ports for connecting monitoring devices and third-party integration.
- Logic Interface (DRM): RJ45 port for grid dispatch control.
- Meter Connection: RS485 port for smart meter integration.
- Wi-Fi/GPRS/PLC: Optional communication modules for remote monitoring.
- DC Switch: Integrated for safe isolation.
- Grounding Terminal: External grounding point on the heat sink.
Advanced Technology
- Integrated Meteorological Equipment: Built-in sensors for intelligent system inefficiency warnings.
- AI-based Millisecond Arc Protection (AFCI): Detects DC arcs in milliseconds to prevent fire hazards.
- Real-time PV Grounding Detection and Protection: Continuously monitors for ground faults.
- Arc Fault and RSD Co-operation: Optional integration of AFCI and Rapid Shutdown for improved fire safety.
- Primary/Secondary Export Power Control: Flexible and fast control supporting up to 10 units in parallel.
- Dual Independent RS485 Ports: Perfect adaptation to third-party integration.
- Genset Compatibility: Supports single and multiple genset applications without the need for an external genset controller.
- Primary/Secondary Export Power Control + Three-Phase Unbalanced Output Control (Optional): Allocates each phase power on demand, flexibly compatible with various power grids.
- Nighttime PID Recovery (Optional): Prevents Potential Induced Degradation in PV modules during nighttime.
- Transformerless Topology: Delivers high efficiency and a lightweight design.
Installation & Scalability
The Solis S6-GC125K is designed for easy wall-mounted or rack-mounted installation with a compact 1014 × 567 × 345 mm footprint and 96 kg weight. It offers multiple installation options including vertical or tilted backward (≤15°) mounting. The inverter requires a minimum clearance of 500mm around it for proper ventilation. For larger systems, up to 10 inverters can be installed in parallel with proper AC and DC protection using the primary/secondary export power control feature. The integrated RS485 and optional Wi-Fi/GPRS/PLC modules allow for remote monitoring and firmware updates via the SolisCloud platform.
Solis Monitoring App (SolisCloud)
- Real-Time Monitoring: View PV generation, grid export, and load consumption data.
- Energy Analysis: Analyze daily, monthly, and yearly energy generation.
- String-Level Monitoring: View individual string current and voltage for precise diagnostics.
- Fault Alerts: Receive push notifications for any system faults or alarms.
- Remote Firmware Update: Update inverter firmware directly from the app.
- Multi-Plant Management: Monitor multiple installations from a single account.
- 24H Consumption Display: View full-day load consumption when paired with a smart meter.
- Export Power Control Settings: Adjust export limits and zero-export parameters remotely.
- Historic Data: Access up to 20 years of historical performance data.
- Web Portal: Access the SolisCloud web portal for detailed analysis and reporting.
Frequently Asked Questions (FAQ)
Q1. What is the nominal output power of the Solis S6-GC125K?
The nominal output power is 125 kW.
Q2. What is the maximum PV input power?
The recommended maximum PV power is 187.5 kW, supporting >150% DC/AC ratio.
Q3. What is the maximum efficiency?
The maximum efficiency is 98.7% with EU efficiency of 98.3%.
Q4. How many MPPT trackers does it have?
It has 10 MPPT trackers with 20 strings (2 per MPPT).
Q5. What is the maximum input current per MPPT?
The maximum input current is up to 42A per MPPT with a 50A short circuit current.
Q6. What is the start-up voltage?
The start-up voltage is 180V.
Q7. What is the ingress protection rating?
It has an IP66 ingress protection rating for outdoor installation.
Q8. What is the operating temperature range?
-30°C to +60°C.
Q9. Does it support AFCI?
Yes, it features optional AI-based millisecond arc protection (AFCI 2.0) to proactively reduce fire risk.
Q10. What communication options are available?
It supports dual independent RS485 as standard, with optional Wi-Fi, GPRS, and PLC modules.
Q11. Does it support export power control?
Yes, it supports primary/secondary export power control for zero-export applications.
Q12. What is the warranty period?
It comes with a 5-year official warranty, extendable to 20 years.
Q13. Is it SREDA approved?
Yes, the Solis S6-GC125K is SREDA approved for net metering in Bangladesh.
Q14. What is the cooling method?
Intelligent fan-cooling with noise emission of ≤55 dB(A).
Q15. What is the maximum operating altitude?
4000 meters.
Download Datasheet | Download User Manual | For manufacturer details, see the official page: Solis S6-GC125K
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