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125kW 241kWh Air-Cooled All-in-One High-Voltage Commercial Energy Storage System
The system can be configured for new solar projects, existing PV system retrofits and hybrid microgrids. GSL ENERGY provides project-based configuration support based on the site load profile, electricity tariff, grid conditions, renewable energy capacity, and required backup duration.
A flexible 125kW/241.15kWh commercial energy storage platform for solar integration, peak shaving, backup power and hybrid microgrids.
125kW Power and 241.15kWh Energy Capacity
The system combines 125kW of rated AC input and output power with 241.15kWh of nominal battery capacity, providing approximately 1.93 hours of energy storage at rated output.
768V High-Voltage Battery Architecture
Fifteen modular 16.08kWh LiFePO4 battery units form a 768V high-voltage platform, helping reduce DC-side current and transmission losses while supporting efficient power conversion.
Flexible Solar Integration
The 125kW hybrid inverter supports up to 250kW of PV access, with 10 MPPT channels and 20 PV string inputs. AC- and DC-coupled configurations support both new solar projects and existing photovoltaic system retrofits.
Intelligent Energy Management
Configure up to six charging and discharging periods per day for solar self-consumption, peak shaving and time-of-use optimization. WiFi and LAN connectivity support remote monitoring and EMS integration.
Grid, Off-Grid and Multi-Source Operation
The system supports grid-connected energy management and off-grid backup, with peak off-grid output of up to 1.5 times the rated power for 10 seconds. The smart port also supports grid-tied inverters, diesel generators and wind turbines.
Intelligent Air Cooling and IP55 Protection
The integrated air-conditioning system maintains a controlled internal operating temperature, while the IP55-rated enclosure, smoke and heat detection, and coordinated electrical protection support reliable commercial operation.
6,500+ Cycles and 10-Year Warranty
The LiFePO4 battery modules provide at least 6,500 cycles under specified test conditions. A 10-year warranty is available subject to GSL ENERGY warranty terms and approved operating conditions.
Scalable up to 1.25MW/2.41MWh
Connect up to 10 systems in parallel to expand total capacity to approximately 1.25MW/2.41MWh. A dedicated power distribution cabinet is recommended when more than six systems are connected.
Product Specifications
Technical specifications of the GSL-BESS-125K241 125kW/241.15kWh air-cooled high-voltage commercial energy storage system.
| System Specifications | |
| System Model | GSL-BESS-125K241 |
| Rated AC Power | 125kW |
| Nominal Battery Energy | 241.15kWh |
| Nominal DC Voltage | 768V |
| Number of Battery Modules | 15 modules |
| Cabinet Dimensions (W × D × H) | 1250 × 1350 × 2480mm, excluding inverter |
| Cabinet Weight | Approximately 3,500kg, excluding inverter |
| Enclosure Rating | IP55 |
| Cooling Method | Intelligent air cooling with integrated air conditioner |
| Communication | WiFi and LAN hardware included |
| Maximum Parallel Systems | Up to 10 systems |
| System Warranty | 10 years |
| Battery Specifications | |
| Battery Module Model | GSL-51-314 |
| Battery Chemistry | Lithium Iron Phosphate (LiFePO4) |
| Energy per Module | 16.08kWh |
| Nominal Module Voltage | 51.2V |
| Module Capacity | 314Ah |
| Maximum Module Charge/Discharge Current | 150A |
| Charging Temperature | 0°C to 55°C |
| Discharging Temperature | −20°C to 55°C |
| Cycle Life | ≥6,500 cycles at 25°C ±2°C, 0.5C/0.5C, 70% EOL |
| Hybrid Inverter and Battery Input | |
| Inverter Model | Deye SUN-125K-SG02HP3-EU-GM10 |
| Supported Battery Type | High-voltage lithium-ion battery |
| Battery Voltage Range | 160–1000V |
| Maximum Inverter Charge/Discharge Current | 100A + 100A |
| Number of Battery Inputs | 2 |
| Battery Charging Strategy | Automatic adaptation to BMS |
| PV Input Specifications | |
| Maximum PV Access Power | 250kW |
| Maximum PV Input Power | 200kW |
| Maximum PV Input Voltage | 1000V |
| Start-Up Voltage | 180V |
| MPPT Voltage Range | 150–850V |
| Rated PV Input Voltage | 650V |
| Maximum Operating PV Input Current | 10 × 42A |
| Maximum PV Short-Circuit Current | 10 × 63A |
| MPPT Trackers / PV Strings | 10 MPPT / 20 strings |
| AC Input and Output Specifications | |
| Rated AC Input/Output Active Power | 125kW |
| Maximum AC Apparent Power | 135kVA |
| Rated AC Input/Output Current | 189.4A / 181.2A |
| Maximum AC Input/Output Current | 204.6A / 195.7A |
| Maximum Continuous AC Passthrough | 250A, grid to load |
| Peak Off-Grid Power | 1.5 times rated power for 10 seconds |
| Power Factor Adjustment Range | 0.8 leading to 0.8 lagging |
| Rated AC Voltage | 220/380V or 230/400V, 3L + N + PE |
| Grid Frequency and Range | 50Hz: 45–55Hz; 60Hz: 55–65Hz |
| Total Harmonic Distortion | THDi <3% at nominal power |
| Efficiency, Protection and Compliance | |
| Maximum Inverter Efficiency | 98.70% |
| European Efficiency | 98.10% |
| MPPT Efficiency | >99% |
| Surge Protection | Type II on DC side and Type II on AC side |
| Integrated Protection | DC reverse-polarity protection, AC overcurrent protection, thermal protection, AC overvoltage protection, AC short-circuit protection, DC component monitoring, anti-islanding protection, DC switch, insulation impedance detection and residual-current detection. Optional AFCI protection is available. |
| Battery Standards and Certifications | UN38.3, IEC 62619 and CE |
| Inverter and Grid Standards | IEC/EN 61000-6-1/2/3/4, IEC/EN 62109-1, IEC/EN 62109-2, CEI 0-21 and VDE-AR-N 4105 |
Flexible System Architecture
How the GSL-BESS-125K241 Works
The system coordinates photovoltaic generation, battery storage, grid power, and backup sources through a 125kW three-phase hybrid inverter, providing flexible energy management for commercial and industrial sites.
Solar PV
Up to 250kW PV access with 10 MPPT channels and 20 string inputs.
125kW Hybrid Inverter
Coordinates solar, battery, grid and backup energy sources.
241.15kWh Battery
A 768V LiFePO4 battery platform stores energy for scheduled use.
Utility Grid
Supports grid charging, grid export, AC passthrough and peak-demand control.
Commercial Loads
Supplies normal site loads and designated critical loads during outages.
Solar Self-Consumption
Solar power supplies site loads first, while surplus generation charges the battery. Stored energy can be used when solar generation decreases or electricity prices rise.
Peak Shaving
The battery discharges when site demand approaches the configured grid limit, helping reduce peak demand and avoid unnecessary increases in contracted power capacity.
Time-of-Use Optimization
Up to six daily charging and discharging periods can be configured to store energy during low-tariff hours and discharge during higher-priced periods.
Backup Power
During a grid interruption, the system can supply designated critical loads through an appropriately designed backup distribution circuit.
New Projects and System Retrofits
AC- and DC-Coupled Deployment
The GSL-BESS-125K241 can be configured for new solar-plus-storage projects or added to an existing photovoltaic installation, giving EPCs and project owners greater flexibility during system design.
DC Coupling
Recommended for new projects where PV and battery storage are designed as one coordinated system.
AC Coupling
Suitable for retrofitting an existing PV system while retaining the installed grid-tied solar inverter.
Smart Port for Hybrid Energy Projects
The smart port supports integration with grid-tied inverters, diesel generators, and wind turbines. The final energy-management strategy is configured according to the site load profile, grid conditions, renewable generation, and backup requirements.
Commercial Energy Storage Applications
Where Can the GSL-BESS-125K241 Be Used?
The 125kW/241.15kWh system is designed for commercial sites that need to increase solar self-consumption, control peak demand, improve power reliability or coordinate multiple energy sources.
Farms and Agricultural Facilities
Store surplus solar energy for irrigation pumps, refrigeration, ventilation, processing equipment and other agricultural loads.
Key value: Lower peak demand and improved rural power reliability.
Hotels and Resorts
Shift solar energy into evening operating hours and support critical lighting, communications, refrigeration and guest-service loads.
Key value: Reduced electricity costs and better service continuity.
Service Stations and Convenience Stores
Manage electricity demand from refrigeration, lighting, pumps, air conditioning, digital systems and other continuously operating loads.
Key value: Peak-load control and critical-load backup.
Small Factories and Workshops
Reduce demand peaks caused by machinery and production equipment, while reserving battery capacity for essential operational loads.
Key value: Demand-charge reduction and lower downtime risk.
Warehouses and Commercial Buildings
Store rooftop solar generation and supply energy during periods of high demand from HVAC, lighting, elevators and building services.
Key value: Higher solar utilization and time-of-use savings.
Weak-Grid and Hybrid Microgrids
Coordinate solar power, battery storage, utility power, diesel generators or wind turbines in locations with limited grid reliability.
Key value: Reduced generator runtime and improved energy resilience.
Not Sure Whether 125kW/241.15kWh Fits Your Project?
Send us your load profile, PV capacity, electricity tariff and required backup duration. GSL ENERGY can recommend a suitable power, capacity and operating configuration.
Frequently Asked Questions
GSL-BESS-125K241 Commercial Energy Storage FAQ
Key information for EPC contractors, system integrators, distributors and commercial project owners evaluating the 125kW/241.15kWh system.
Have a Different Technical Question?
Contact GSL ENERGY with your site data and project requirements for configuration support and technical documentation.
Email: sales@gsl-energy.com
Tel: +86 755 84515360
Address: A602, Tianan Cyber Park, Huangge North Road, Longgang District, Shenzhen, China0086 13923720280