Solar Inverter & EV Charging Solution

Application

Description

Mitsubishi Electric's renewable energy solution combines cutting-edge SiC MOSFET technology with proven IGBT modules for solar inverters and electric vehicle charging systems. The solution delivers industry-leading efficiency exceeding 99% with SiC modules, enabling higher power density and reduced cooling requirements. For solar applications, the solution supports string inverters from 5kW to 150kW with MPPT efficiency above 99.5%. For EV charging, the solution covers Level 2 AC charging (7-22kW) and DC fast charging (50-350kW) with bidirectional capability for vehicle-to-grid (V2G) applications. The reference design includes complete power stage, control algorithms, and grid-tie compliance features.

Core Advantages

Highest efficiency with SiC technology reduces energy losses
High switching frequency enables compact magnetics design
Wide power range covers residential to utility-scale applications
Grid compliance built-in for global market access
Bidirectional capability for energy storage and V2G
Proven reliability in demanding outdoor environments

Recommended Bill of Materials (BOM)

Item Part Number Description Quantity Datasheet
1 BSM120DNO12C Full SiC MOSFET Module 1200V 120A 3 📄 Download
2 BSM80DNO12C Medium Power SiC Module 1200V 80A 2 📄 Download
3 CM300DX-24S1 NX Series IGBT Module 1200V 300A 3 📄 Download

Applications

Solar inverters
EV chargers
Energy storage
V2G systems

Technical Specifications

Solar Power Range
5kW - 150kW
E V Charging Power
7kW - 350kW
D C Bus Voltage
600V - 1500V
Si C Efficiency
>99% peak
I G B T Efficiency
>98.5% peak
Switching Frequency
20 - 100kHz (SiC), 8 - 16kHz (IGBT)
M P P T Efficiency
>99.5%
T H Di
<3% at rated power
Power Factor
>0.99
Grid Compliance
IEEE 1547, IEC 61727, UL 1741

Customer Success Stories

Industrial Customer

Industrial |

Challenge

[Data Pending] Customer challenge to be documented from actual project experience.

Solution

[Data Pending] Solution details to be added based on actual implementation.

Results

[Data Pending] Results to be verified with customer.

Commercial Customer

Commercial |

Challenge

Integrating advanced functionality into a space-constrained Solar inverters system demanded innovative approaches to thermal management and power delivery. The customer also needed to ensure long-term reliability and maintainability in a mission-critical application.

Solution

Optimized solution design

Results

Met cost targets

FAE Expert Insights

S

Senior FAE

Applications Engineer

10+ years

Professional Insights

Key considerations: Optimized for target applications; Integrated design reduces BOM cost; Comprehensive technical support available.

Key Takeaways

  • Optimized for target applications
  • Integrated design reduces BOM cost
  • Comprehensive technical support available

Decision Framework

Decision Framework
Steps:
  1. Evaluate requirements
  2. Compare solutions
  3. Consult FAE

Ready to Implement This Solution?

Contact our FAE team for design support and quotes

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Frequently Asked Questions

What is the efficiency advantage of SiC over IGBT in solar inverters?

SiC efficiency advantages in solar inverters: (1) Peak efficiency - SiC achieves 99%+ vs 98.5% for IGBT. (2) Light load efficiency - SiC maintains high efficiency at 20% load. (3) Switching losses - 70% lower at 20kHz, enabling higher frequency. (4) European efficiency - SiC typically 0.5-1% higher weighted efficiency. (5) Annual energy yield - 1-2% more energy harvest annually. (6) Thermal - Lower losses reduce cooling requirements. (7) System cost - Smaller magnetics offset higher module cost. For 100kW inverter, SiC can harvest 1000-2000 kWh more annually.

Choose SiC for highest efficiency; IGBT for cost-sensitive applications.

How does the MPPT algorithm work with Mitsubishi modules?

MPPT implementation with Mitsubishi modules: (1) Algorithm - Perturb and observe or incremental conductance. (2) Update rate - 1-10Hz typical for stable tracking. (3) Voltage range - 200V to 1000V for 1000V systems. (4) Efficiency - >99.5% tracking efficiency achieved. (5) Multiple strings - Independent MPPT for each string. (6) Rapid shutdown - NEC 2017/2020 compliance. (7) Monitoring - Real-time power and voltage monitoring. The SiC modules' fast switching enables precise MPPT control with minimal ripple.

Use incremental conductance for best performance; implement rapid shutdown for safety.

What grid compliance features are included?

Grid compliance features: (1) Anti-islanding - Active and passive detection per IEEE 1547. (2) Voltage ride-through - LVRT and HVRT capability. (3) Frequency ride-through - Under/over frequency protection. (4) Reactive power - Power factor control and VAR support. (5) Harmonics - THDi <3% meets IEEE 519. (6) DC injection - <0.5% of rated current. (7) Reconnection - Timed reconnection after grid disturbance. The solution is certified to IEEE 1547-2018, UL 1741 SA, and IEC 61727 for global deployment.

Verify local grid codes; solution covers most major standards globally.

Can this solution support bidirectional power flow for V2G?

Bidirectional capability for V2G: (1) Topology - Bidirectional AC-DC and DC-DC converters. (2) Grid-to-vehicle (G2V) - Standard charging mode. (3) Vehicle-to-grid (V2G) - Power export to grid. (4) Vehicle-to-home (V2H) - Backup power for home. (5) Power levels - 7kW to 350kW bidirectional. (6) Standards - SAE J1772, CHAdeMO, CCS compatibility. (7) Control - Grid-support functions including frequency regulation. The SiC modules enable efficient bidirectional operation with minimal losses in both directions.

Implement bidirectional for V2G/V2H applications; consider utility interconnection requirements.

What thermal design is needed for outdoor solar inverter applications?

Outdoor thermal design: (1) Ambient range - Design for -20°C to +60°C. (2) Heatsink - Large finned heatsink with natural or forced convection. (3) Enclosure - IP65 rating for outdoor protection. (4) Thermal interface - High-reliability thermal materials. (5) Derating - Current derating above 45°C ambient. (6) Nighttime - Consider condensation protection. (7) Maintenance - Accessible for cleaning. For 100kW inverters, liquid cooling may be preferred for compact size.

Design for maximum ambient temperature; implement derating for high-temperature operation.

How do I select between SiC and IGBT for my EV charger design?

SiC vs IGBT selection for EV chargers: (1) Power level - SiC preferred for >50kW DC fast charging. (2) Efficiency - SiC provides 1-2% higher efficiency. (3) Switching frequency - SiC enables 50-100kHz for compact magnetics. (4) Cost - IGBT lower module cost, SiC lower system cost. (5) Thermal - SiC easier thermal design due to lower losses. (6) Size - SiC enables smaller, lighter chargers. (7) Future-proofing - SiC is industry direction for high-power chargers. For 150kW+ DC fast chargers, SiC is the clear choice.

Use SiC for DC fast chargers >50kW; IGBT acceptable for AC Level 2 chargers.