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1.25MW 10kV Medium-Voltage Transformer-Isolated Hybrid Solar Energy System Power Conversion Container
1.25MW 10kV Hybrid Solar Energy System Conversion Container
The Voltertech BESS-125MW-W is a 1.25MW transformer-isolated conversion unit designed for MW-scale hybrid solar and battery energy storage projects. It connects a 1000–1500V DC-side energy storage system to a 10kV medium-voltage AC network, providing the power conversion and grid interface required for large solar-plus-storage applications.
1.25MW Power Conversion for Hybrid Solar + BESS
In a MW-scale hybrid solar project, the battery system and photovoltaic plant often operate at different electrical levels from the medium-voltage grid. The BESS-125MW-W provides the conversion interface between a compatible high-voltage DC battery system and a 10kV AC network.
This architecture is suitable for projects where solar generation, battery storage and grid connection need to be coordinated through a central energy management or dispatch platform.
Key Specifications
| Model | BESS-125MW-W |
|---|---|
| DC Voltage Range | 1000–1500V |
| DC Rated Output Power | 1250kW |
| Maximum DC Current | 1309A |
| AC Rated Output Power | 1250kVA |
| Rated AC Voltage | 10kV |
| Rated AC Current | 72.5A |
| Isolation Mode | Transformer Isolation |
| Total Harmonic Distortion | ≤3% at Rated Power |
| Power Factor | -1 to +1 Adjustable |
| Cooling Mode | Air Cooling |
| Operating Temperature | -25°C to +50°C |
| Storage Temperature | -25°C to +55°C |
| Operating Humidity | 0%–95% |
| Working Altitude | ≤2000m |
| Battery Communication | CAN / RS485 |
| Dispatch Communication | Modbus RTU / Modbus TCP / IEC 60870-5-104 |
| Dimensions | 5523 × 2400 × 2800mm |
| Net Weight | Approx. 6T |
1000–1500V DC to 10kV AC Integration
The DC side operates within a 1000–1500V range with 1250kW rated power. On the AC side, the system provides 1250kVA rated output at 10kV.
This makes the unit suitable for hybrid solar and BESS projects that require a medium-voltage connection rather than a low-voltage AC output.
- 1000–1500V high-voltage DC interface
- 1.25MW DC-side rated power
- 10kV medium-voltage AC connection
- Transformer-isolated electrical architecture
- Adjustable power factor from -1 to +1
Transformer Isolation for Medium-Voltage Projects
Transformer isolation is built into the system architecture, allowing the conversion unit to provide an isolated interface between the battery-side DC system and the 10kV AC network.
For EPC contractors and system integrators, this can simplify the electrical architecture of projects requiring medium-voltage connection while keeping the energy conversion equipment in a containerized format.
EMS and Dispatch Communication
Large hybrid solar projects normally require coordination between battery storage, solar generation and grid operation. The BESS-125MW-W provides separate communication interfaces for battery-side equipment and project-level dispatch systems.
- CAN and RS485 for battery communication
- Modbus RTU for compatible control systems
- Modbus TCP for network-based integration
- IEC 60870-5-104 for compatible dispatch platforms
Final EMS, SCADA and dispatch compatibility should be confirmed according to the project's communication architecture.
Typical Hybrid Solar Applications
Power conversion between high-voltage battery storage and a 10kV project network.
Medium-voltage interface for hybrid generation and battery storage systems.
Energy conversion for facilities using MW-scale PV and battery storage.
Integration of compatible high-voltage battery storage into medium-voltage electrical systems.
Frequently Asked Questions
1. Is BESS-125MW-W a 125MW energy storage system?
No. The model name is BESS-125MW-W, but the specified rated DC output power is 1250kW, equal to 1.25MW. The AC side is rated at 1250kVA.
2. What role does this unit play in a hybrid solar energy system?
It provides the power conversion and medium-voltage AC interface between a compatible high-voltage DC battery system and a 10kV electrical network. It can therefore form part of a larger PV + BESS hybrid system.
3. Does this 1.25MW unit include battery capacity in kWh?
The technical specification defines this product by power conversion, DC voltage and AC grid parameters rather than battery energy capacity. The required battery kWh or MWh capacity should be selected separately according to project power and discharge-duration requirements.
4. Can it connect a high-voltage BESS directly to a 10kV network?
The unit is specified for a 1000–1500V DC-side connection and a rated 10kV AC output with transformer isolation. Final electrical and protection design should be confirmed for the specific project.
5. Can the system connect to an EMS or SCADA platform?
The unit supports Modbus RTU, Modbus TCP and IEC 60870-5-104 for dispatch communication, together with CAN and RS485 for battery-side communication. Platform compatibility should be confirmed during project engineering.
6. What information is needed for a 1.25MW hybrid solar project quotation?
Provide the PV capacity, required battery power and energy capacity, battery DC voltage range, target discharge duration, grid voltage, communication protocol, project location and site conditions.
Planning a 1.25MW / 10kV Hybrid Solar Project?
Voltertech supports EPC contractors, solar developers and system integrators with MW-scale energy conversion and battery storage solutions.
Send us your PV capacity, BESS power and energy requirements, DC voltage, grid voltage and communication requirements so our team can evaluate the project configuration.
1.25MW Hybrid Solar Energy System
,10kV Medium-Voltage Power Conversion Container
,Transformer-Isolated BESS Conversion Unit
Customer Service
- Email: info@voltertechenergy.com
- Tel: +86 13600078043
- WhatsApp: 8613600078043
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WeChat:
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