AC-Coupled Architecture
PV inverters and battery PCS connect through the AC bus.
2MW / 4.179MWh AC-Coupled Energy Storage System
AC-COUPLED ESS
Solar and liquid-cooled battery storage for self-consumption, peak shaving and energy shifting.
2MWSystem power4.179MWhRated battery energyAC CoupledSystem architecture
System overview
Megawatt Solar + Storage with AC Coupling
The Bluesun 2MW / 4.179MWh proposal combines solar generation and liquid-cooled battery storage on an AC bus, coordinated through EMS.
Designed for commercial and industrial sites requiring solar self-consumption, peak shaving and energy shifting. Final power conversion equipment is selected to match the battery system and site electrical design.
Liquid-Cooled Battery Storage
417.9kWh cabinets support modular storage capacity.
Peak Shaving & Energy Shifting
Store energy during lower-demand periods for later use.
EMS Coordination
System monitoring and communication across connected equipment.
System configuration
What’s Included in the System
Coordinated power conversion, battery storage and supporting equipment.
PV Modules
610W TOPCon3,276 modules · 1,998.36kWp
PV String Inverters
BSM125K-B16 × 125kW
Liquid-Cooled Battery Cabinets
BSC-417KWH10 × 417.9kWhView Battery Cabinet →PV Combiners & Mounting
16 combiner boxes · 1 mounting set
Cabinet Protection & Cooling
BMS, HV control, liquid cooling and fire protection
EMS & Metering
Modbus TCP / RTU system communication
View Full Configuration +
- PV Modules · 3,276 × 610W
- TOPCon modules; calculated array rating 1,998.36kWp.
- PV String Inverters · 16 × 125kW
- BSM125K-B; 2MW combined nominal output.
- DC Combiner Boxes · 16
- 12 inputs / 12 outputs as listed in the proposal.
- PV Mounting · 1 set
- Site-specific mounting design.
- Battery Cabinets · 10 × 417.9kWh
- Ten cabinets shown in the schematic; 4.179MWh combined rated battery energy.
- Battery Modules per Cabinet · 8 × 166.4V 314Ah
- Battery modules including BMS.
- High-Voltage Control per Cabinet · 1
- High-voltage control box.
- Liquid Cooling per Cabinet · 1
- Liquid cooling unit.
- Fire Protection per Cabinet · 1 set
- Integrated fire protection.
- Power Conversion · 2 × 1MW design blocks
- Final PCS model and DC range must match the battery configuration.
- EMS · 1 system
- Central coordination and monitoring.
- Metering & Transformer · Per project design
- Final rating and supply scope confirmed for the site.
System architecture
How the AC-Coupled System Works
PV inverters and battery power conversion share the AC bus, with EMS, meters and a transformer coordinating the connection to site loads and the grid.
Concept schematic from the source proposal. Final PCS selection, battery voltage compatibility and protection require project engineering confirmation.
Technical specifications
2MW / 4.179MWh System Specifications
System configuration, PV inverter and battery cabinet specifications.
- Architecture
- AC-coupled solar + storage
- System power
- 2MW
- Rated battery energy
- 4.179MWh
- PV array
- 3,276 × 610W = 1,998.36kWp
- PV inverter arrangement
- 16 × 125kW
- Battery arrangement
- 10 × 417.9kWh
- Power conversion design
- 2 × 1MW; final PCS selection subject to DC compatibility
- Nominal AC bus
- 400V
- Energy rating
- Rated battery energy; delivered AC energy depends on operating limits and losses
- Functions
- Solar self-consumption, peak shaving and energy shifting
- Communication
- Modbus TCP / RTU; BMS CAN to EMS
- Model
- BSM125K-B
- Quantity
- 16
- Nominal AC power per unit
- 125kW
- Nominal AC voltage
- 230/400V
- Grid frequency
- 50 / 60Hz
- Maximum DC voltage
- 1100V
- MPPT range
- 200–1000V
- MPPT / strings per MPPT
- 8 / 2
- Maximum input current per MPPT
- 40A
- Maximum efficiency
- 98.7%
- Dimensions
- 965 × 700 × 355mm
- Weight
- 85kg
- Specifications below
- Per 417.9kWh cabinet
- Rated energy
- 417.9kWh
- Rated DC voltage
- 1331.2V
- DC voltage range
- 1164.8–1497.6V
- Rated / maximum charge current
- 157A / 314A
- Rated / maximum discharge current
- 157A / 314A
- Operating temperature, charge
- 0–50°C
- Operating temperature, discharge
- −10–50°C
- Protection
- IP66
- Cooling
- Liquid cooling
- Dimensions
- 1700 × 1320 × 2371mm
- Weight
- 3.2t
- Communication
- CAN
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Product resources
Technical Documents
Download the public system proposal covering configuration, conceptual architecture and selected component specifications.
Product FAQ
Your questions, answered.
Key details from the supplied AC-coupled system proposal.
What is the system configuration?+
The proposal combines a 2MW AC-coupled architecture, 16 PV string inverters and ten 417.9kWh liquid-cooled battery cabinets. Power conversion and protection are finalized for the project.
Is 4.179MWh the usable AC energy?+
No. This is rated battery energy. Delivered AC energy depends on battery operating limits, conversion losses, battery condition and the project design.
How much solar PV is specified?+
The equipment list specifies 3,276 modules rated at 610W, giving a calculated 1,998.36kWp PV array, with sixteen 125kW PV string inverters.
Which battery cabinet is used?+
The proposal specifies 417.9kWh liquid-cooled battery cabinets. Each cabinet contains eight battery modules with high-voltage control, cooling and fire protection.
How is power conversion selected?+
The design uses two 1MW power conversion blocks. The final PCS model and its DC operating range must be matched to the battery system and site requirements.
Which energy management functions are supported?+
The proposal describes solar self-consumption, peak shaving and energy shifting under EMS coordination.
Can the system operate off-grid?+
Whole-system islanding, switching equipment and control performance require project-specific engineering confirmation. They are not assumed from individual component specifications.
Product inquiry
Plan Your AC-Coupled Energy Storage System
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2MW / 4.179MWh AC-Coupled Energy Storage System
Model: AC-COUPLED ESS Category: Solar Power System