AC-Coupled Architecture
PV inverters and battery PCS connect through the AC bus.
1MW / 2MWh AC-Coupled Energy Storage System
AC-COUPLED ESS
Solar and liquid-cooled battery storage for self-consumption, peak shaving and energy shifting.
1MWRated AC power2MWh ClassBattery storageAC CoupledSystem architecture
System overview
Megawatt Solar + Storage with AC Coupling
The Bluesun 1MW / 2MWh proposal brings solar generation and liquid-cooled battery storage together on an AC bus, with EMS coordination across the system.
Designed for commercial and industrial sites seeking to use more solar energy on site, shift stored energy to higher-demand periods and manage peak demand.
Liquid-Cooled Storage
Modular 125kW / 261kWh cabinets manage battery temperature.
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 TOPCon1,638 modules · 999.18kWp
PV String Inverters
BSM125K-B8 × 125kW
Liquid-Cooled ESS Cabinets
125kW / 261kWh8 cabinets · 1MW PCS totalView ESS Cabinet →PV Combiners & Mounting
8 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 · 1,638 × 610W
- TOPCon modules; calculated array rating 999.18kWp.
- PV String Inverters · 8 × 125kW
- BSM125K-B; 1MW combined nominal PV inverter output.
- DC Combiner Boxes · 8
- 12 inputs / 12 outputs as listed in the proposal.
- PV Mounting · 1 set
- Final mounting design depends on the site.
- ESS Cabinets · 8 × 125kW / 261kWh
- Eight cabinets shown in the schematic; 1MW combined PCS power and calculated 2088kWh rated battery energy.
- Battery Modules per Cabinet · 5 × 166.4V 314Ah
- Lithium battery modules including BMS.
- High-Voltage Control per Cabinet · 1
- High-voltage control box.
- PCS per Cabinet · 1 × 125kW
- Bidirectional power conversion.
- Cooling per Cabinet · 1
- Liquid cooling unit.
- Fire Protection per Cabinet · 1 set
- Integrated fire protection system.
- EMS & Metering · Per project design
- EMS master and equipment communication shown in the schematic.
- Transformer & Grid Connection · Per project design
- Transformer shown in the schematic; rating and supply scope require project confirmation.
System architecture
How the AC-Coupled System Works
PV inverters and storage cabinets share the AC bus, with EMS communication, metering and a transformer connecting the system to site loads and the grid.
Schematic from the supplied system proposal. Dashed lines show Modbus communication. Final electrical design and equipment scope depend on the project.
Technical specifications
1MW / 2MWh System Specifications
System configuration and specifications for each PV inverter and storage cabinet.
- Architecture
- AC-coupled solar + storage
- Nominal system class
- 1MW / 2MWh
- PV array
- 1,638 × 610W = 999.18kWp
- PV inverter output
- 8 × 125kW = 1MW
- ESS cabinet arrangement
- 8 × 125kW / 261kWh (schematic)
- Calculated rated battery energy
- 2088kWh (8 × 261kWh)
- AC system voltage
- 400V
- Capacity distinction
- Rated battery energy is not guaranteed usable AC energy
- Functions
- Solar self-consumption, peak shaving and energy shifting
- Communication
- Modbus TCP / RTU shown in schematic
- Model
- BSM125K-B
- Quantity
- 8
- 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 125kW / 261kWh cabinet
- Battery configuration
- 1P260S
- Rated battery energy
- 261kWh
- Rated DC voltage
- 832V
- DC voltage range
- 728–936V
- Rated / maximum battery current
- 157A / 314A
- Rated AC power
- 125kW
- Rated AC voltage
- 230/400V
- Grid frequency
- 50 / 60Hz
- Protection rating
- IP66
- Cooling
- Liquid cooling
- Dimensions
- 1005 × 1320 × 2200mm
- Weight
- 2.5t
- Battery communication
- CAN
Real projects
Related Solar & Energy Storage Projects
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Product resources
Technical Documents
Download the 12-page public system proposal with configuration, schematic and component specifications.
Product FAQ
Your questions, answered.
Key details from the supplied AC-coupled system proposal.
What does AC coupling mean in this system?+
The PV string inverters and the battery power conversion systems connect on a shared AC bus. EMS communication coordinates the connected equipment.
What is included in the proposal?+
The proposal includes 1,638 PV modules, eight 125kW PV inverters, eight combiner boxes, mounting and liquid-cooled ESS cabinets. The schematic shows eight storage cabinets, metering and EMS communication. Final supply scope is confirmed for each project.
Is 2MWh the usable AC energy?+
No. 2MWh identifies the system class. Eight 261kWh cabinets give a calculated rated battery energy of 2088kWh. Usable AC energy depends on operating limits, conversion losses, battery condition and the agreed project design.
How much solar generation is specified?+
The equipment list specifies 1,638 modules rated at 610W each, equivalent to 999.18kWp, with eight 125kW grid-connected string inverters.
Which storage cabinet does the system use?+
The proposal specifies 125kW / 261kWh liquid-cooled cabinets with battery modules, high-voltage control, PCS, cooling and fire protection.
What energy management functions are supported?+
The proposal describes solar self-consumption and peak shaving / valley filling: storing energy when available or during lower-price periods and discharging when needed.
Does this proposal guarantee off-grid operation?+
The cabinet specification includes off-grid AC ratings, but whole-system islanding and transition performance depend on the project electrical design, protection and control equipment. These must be confirmed for the installation.
Product inquiry
Plan Your AC-Coupled Energy Storage System
Tell us your load profile, PV capacity, site location and backup requirements. Our team will help evaluate your system configuration.
1MW / 2MWh AC-Coupled Energy Storage System
Model: AC-COUPLED ESS Category: Solar Power System