Description
BAC75040II
/ BAC300100II
V2G Bidirectional AC/DC Power Module — Core for Vehicle-to-Grid Interaction
200–750Vdc ·
3-Level Technology · High-Frequency Isolation · Dual-DSP · V2G / V2L Ready
|
✓ IP20
|
✓ Hot-Swap
V2G (Vehicle to Grid) technology enables bidirectional interaction between electric vehicles and the power grid. By leveraging EV energy storage as a flexible supplement to the grid and renewables, users can charge during off-peak hours and discharge during peak hours — capturing the price difference while supporting grid stability.
The AC/DC stage employs advanced 3-level technology for efficient bidirectional AC/DC conversion. The DC/DC stage utilizes high-frequency isolated bidirectional conversion with soft-switching resonant technology — achieving high efficiency with automatic switching between charging and discharging modes.
The dual-DSP architecture ensures stable and reliable bidirectional performance. Supports parallel operation (up to 12 modules) with CAN and RS485 communication interfaces for seamless integration with third-party equipment. Widely applied in energy storage, battery formation, emergency power, and aging test systems — the preferred choice for industries requiring bidirectional energy flow.
⚙️ Product Advantages — Safer · More Efficient · Smarter · Lower Cost · More Flexible
Safer & More Reliable
Full high-frequency isolation ensures electrical safety between battery and grid/load. DSP+CPLD full digital control with multi-level hardware/software protection. Dual-DSP stable architecture. Supports up to 12 modules in parallel with reliable expansion.
Higher Efficiency
High-frequency isolation eliminates bulky line-frequency transformers — achieving ≥95% efficiency. AC/DC 3-level technology delivers up to 98% efficiency; DC/DC soft-switching resonant also reaches 98%.
Smarter & More User-Friendly
Seamless grid/off-grid switching with STS module. Wide battery voltage range (100–750Vdc) covering passenger EVs and echelon batteries. Grid voltage adaptive (50/60Hz auto‑detection).
Lower Cost
Eliminates line-frequency transformer — reducing system cost. One circuit handles both charging and inverting. Integrated design delivers two functions in one.
More Flexible
19″ standard rack mount with hot-swappable modules. Easy for system integrators to design flexible energy storage, battery formation, and DC aging systems.
🏭 Typical Applications
EV V2G Energy Storage
By 2030, 80 million EVs are expected. V2G enables bidirectional energy flow, peak shaving, renewable integration, and reduced charging infrastructure footprint.
Battery Echelon Utilization & Microgrids
Embedded PCS module for flexible energy storage design. Isolated bidirectional AC/DC ensures safety and efficiency. Grid/off-grid switching supports islands, remote villages, and temporary events.
Battery Formation & Grading
High-frequency isolation replaces traditional line-frequency transformers — improving efficiency, reducing cost and footprint. Battery pack grouping eliminates line-frequency transformers.
DC Power Aging & Feedback
Integrate V2G modules into DC power supply aging systems — recover over 95% of energy back to the grid, significantly reducing electricity costs.
⚡ Electrical Topology & Working Mode
BAC75040II / BAC300100II adopts a bidirectional AC/DC topology with 3-level technology + high-frequency isolated DC/DC, supporting bidirectional energy flow with automatic charge/discharge switching. Dual-DSP architecture ensures independent and stable control of both stages.
⟷
AC/DC 3‑Level 98%
⟷
DC/DC HF Isolation
⟷
Battery 200‑750Vdc
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⚡ Auto Charge/Discharge
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🔌 STS Seamless Switching
🛡️ Protection & Safety — Full Digital Multi-Level Protection
| Protection Category | Function Description | Technology / Standard |
|---|---|---|
| Overvoltage Protection | AC side overvoltage · DC side (battery) overvoltage | DSP real‑time sampling, immediate PWM lock & alarm |
| Overcurrent Protection | Input/output overcurrent · short-circuit protection | Hardware cycle‑by‑cycle current limit + CPLD fast shutdown |
| Overtemperature Protection | Power device & whole‑unit over‑temperature | Multi‑point temperature sensing, auto derating or shutdown |
| Grid Abnormal Protection | Anti‑islanding · LVRT/HVRT · frequency/phase error | Compliant with GB/T 34120, NB/T 33001 |
| Insulation & Isolation | Battery-to-grid/load full high‑frequency isolation | High‑frequency transformer isolation + insulation monitoring |
| EMC Compliance | Electromagnetic compatibility Class A | Meets NB/T 33001, NB/T 33008 Class A requirements |
📊 Technical Specifications — BAC75040II / BAC300100II
| Parameter | BAC75040II | BAC300100II |
|---|---|---|
| 🔋 Charging — AC Side | ||
| Rated Grid Voltage | 400Vac (380/400/415Vac configurable) | |
| Grid Voltage Range | 304 – 485Vac | |
| Grid Frequency | 50/60 ±5% (auto-adaptive) | |
| Voltage System | 3-phase 4-wire (3W+PE) | |
| Input Current | ≤ 38A | ≤ 28A |
| Power Factor | ≥ 0.99 (full load) | |
| Current Harmonic (THD) | < 3% (full load) | |
| 🔋 Charging — Battery DC Side | ||
| Output Voltage Range | 200 – 750Vdc (Rated 500V) | 200 – 750Vdc (Rated 500V) |
| Output Current | 40A | 100A |
| Rated Power | 20kW | 15kW |
| Charging Efficiency | ≥95% (SiC) / ≥94% (Si) | |
| Voltage Regulation Accuracy | ±0.5% | |
| Current Regulation Accuracy | ±1% | |
| Ripple Coefficient | < 1% Vo | |
| 🔋 Discharging (V2G Grid-Tied) | ||
| Battery Voltage Range | 200 – 750Vdc | |
| Discharge Current (Max) | 40A | 100A |
| Grid Voltage Range | 304 – 485Vac | |
| Grid Frequency | 50/60 ±5% (auto-adaptive) | |
| Output Power | 20kW | 15kW |
| Discharge Efficiency | ≥95% (SiC) / ≥94% (Si) | |
| 📋 General | ||
| Protection Functions | Overvoltage · Overcurrent · Short‑Circuit · Overtemperature | |
| Operating Temperature | -30°C – 65°C (derating above 55°C) | |
| Storage Temperature | -40°C – 75°C | |
| Noise | < 60dB | |
| Dimensions (W×D×H) | 442 × 575 × 86 mm | |
| Weight | 19 kg | |
| Ingress Protection | IP20 (single module) | |
| Cooling | Intelligent speed control, forced air cooling | |
| Certification Standards | GB/T 34120, GB/T 34133, NB/T 33001, NB/T 33008 (Class A EMC) | |
❓ Frequently Asked Questions
🚗 Does this bidirectional power module support V2G functionality?
Yes. The module features bidirectional AC/DC and DC/DC conversion capabilities, enabling bidirectional energy flow between EVs and the grid — fully meeting V2G application requirements.
🔗 How do modules parallel for capacity expansion?
Supports direct parallel connection of up to 12 modules via CAN or RS485 communication for power control and system management — allowing users to scale power as needed.
🔄 How is grid switching implemented?
With an external STS (Static Transfer Switch) module, the system can rapidly switch to off-grid mode during grid faults — ensuring uninterrupted power to critical loads.
📡 What communication protocols are supported?
Standard CAN and RS485 interfaces with Modbus RTU protocol support — easily integrated with third-party EMS, BMS, and monitoring systems.
🔋 Which battery types are compatible?
Wide battery voltage coverage (100–750Vdc) makes it compatible with LFP, NMC, and other battery types — suitable for various energy storage and formation applications.
🔗 Related Products — Full Series Energy Storage Power Electronics
— 15kW–250kW · Grid/Off-Grid Switching
— 5kW–250kW · High-Frequency Isolation
— Integrated PCS + MPPT + EMS
— Cabinet / Container Type BESS
— Vehicle-to-Grid · Mobile Energy Storage
— R&D / Testing · Full-Digital DSP
— Smart Energy Distribution · Multi-Energy Complementary
— Monitoring · Scheduling · Optimization
💼 Business & Service
