Infineon, Delta Electronics Develop 3-in-one-system Integrating Solar, Energy Storage and EV Charging

Infineon Technologies AG and Delta Electronics have developed a three-in-one-system that integrates solar, energy storage and charging of electric vehicles.

With bidirectional inverters, the electric car is not only charged, but can also be used as a buffer storage or as household emergency backup power.

More and more cars are equipped for this. Looking ahead, bidirectional energy flows could also be used to realize new vehicle-to-home (V2H) and vehicle-to-grid (V2G) solutions.

A single-family home can consume an average of 10-15 kWh of energy per day. A fully charged car battery with a capacity of 30 to 100 kWh could therefore theoretically bridge a few days as an emergency power solution. Homeowners thus secure inexpensive electricity as well as more independence in power supply.

The new system provided by Delta allows a maximum continuous current of 34 A and achieves peak efficiencies of more than 97.5 percent. To increase power density, energy-efficient power semiconductors made of silicon carbide (SiC) from Infineon are used.

Compared to silicon-based semiconductors, the compound material SiC reduces energy losses when converting current by around half. The size of charging stations can also be reduced by about 30 percent.

With SiC, photovoltaic systems become more powerful, charging times at fast-charging stations and wall boxes are shorter, and the range of electric cars five to ten percent higher.