Tesla Cars Can Now Bidirectionally Charge Home with Sigenergy's New Powerwall Competitor

Tesla vehicles can now do vehicle-to-home (V2X) with Sigenergy's Powerwall competitor, which integrates a universal bidirectional DC charger. The system consists of stackable 8 kWh battery modules, a solar inverter, and a bidirectional DC charger module. It bypasses the onboard charger in electric vehicles, allowing for up to 25 kW DC fast charging at home. Tesla's Powerwall 3 lacks an integrated EV charger.

Electric vehicle (EV) technology continues to evolve, with recent advancements in bidirectional charging (V2X) now making headlines. Tesla vehicles are now capable of sending electricity back to the home, thanks to a new competitor to Tesla's Powerwall, developed by Sigenergy. This innovation allows for significant potential in energy management and grid integration.

Sigenergy's system, which includes stackable 8 kWh battery modules, a solar inverter, and a bidirectional DC charger module, enables up to 25 kW DC fast charging at home. This system bypasses the onboard charger in electric vehicles, allowing for efficient and rapid charging. The system is available with both CCS and NASC connectors, with bidirectional charging utilizing the CCS protocol [1].

While Tesla's Powerwall 3 offers improvements in power capacity and solar inverter integration, it lacks an integrated EV charger. Sigenergy's device combines all components into a single, stackable, and expandable system, providing a more comprehensive solution for home energy storage and EV charging [1].

The system's ability to provide bidirectional charging means it can not only DC charge an EV but also pull DC power from an EV. This capability is particularly notable for Tesla cars, which have historically been limited in their bidirectional charging capabilities. While Tesla's Cybertruck is the only officially supported Tesla vehicle for bidirectional charging, Sigenergy's system has demonstrated successful unofficially supported bidirectional charging with various Tesla models [1].

Sigenergy's system is fully certified to the ISO 15118 international standard for vehicle-to-grid (V2G), setting it ahead of the curve in terms of industry adoption. The system's modular design allows for easy expansion and integration with existing solar panels, further enhancing its versatility [1].

This innovation in bidirectional charging has the potential to unlock significant value in energy capacity, enabling a more decentralized and efficient energy infrastructure. As EV adoption continues to grow, the ability to manage energy between cars, homes, and the grid becomes increasingly important. Sigenergy's system offers a promising solution for homeowners and businesses seeking to optimize their energy usage and reduce dependence on the grid [1].

References:
[1] https://electrek.co/2025/08/05/tesla-cars-can-now-do-vehicle-to-home-v2x-with-this-new-powerwall-competitor/?extended-comments=1