The Powerwall 2 came and went, and never had a charger integrated. Tesla is currently on the Powerwall 3, which features some significant improvements in power capacity and solar inverter integration, but it doesn’t have an integrated EV charger. Sigenergy’s device combines all components into a single, stackable, and expandable system with an incredible user interface. For a few years now, the industry has had the ISO 15118 international standard for vehicle-to-grid (V2G), and Sigenergy has built a fully certified bidirectional DC charger module that fits with its modular energy storage system. The system consists of stackable 8 kWh battery modules, with a top module that includes a solar inverter and serves as the brain of the system. Between them, you can fit this new bidirectional DC charger module. With 3 battery modules (24 kWh), it looks like this: The system can provide up to 25 kW DC fast charging, allowing you to charge at a rate of 25 kW at home. It bypasses the onboard charger in your electric vehicle, just like public DC fast-charging stations. At 25 kW, which is achievable with 3 battery modules and solar, it is certainly not as fast as most public fast-charging stations, but it is a lot more than the generally ~7 kW capacity of a level 2 home charging station. And the killer feature is that this module is capable of bidirectional charging so it can not only DC charge an EV, but it can also pull DC power from an EV. The device is available with both CCS and NASC connectors, but bidirectional charging utilizes the CCS protocol. It means that even Tesla cars with NASC connectors and CCS modules (2019-2021, depending on the model) can use the bidirectional. To be clear, this is unofficially supported by Tesla – meaning that it works, we have tried it, but it’s not something that the automaker officially supports. A Tesla Model Y doing bidirectional DC charging with vehicle-to-grid up to 10 kW. I think this is a first as far as I know. pic.twitter.com/unQHRkDxyn