Two years ago, Tesla opened its EV connector design patents, rebranding its chargers and ports as the "North American Charging Standard (NACS)" and releasing the official NACS white paper. The document introduced the concept of Vehicle-to-Load (V2L) for the first time, stating that NACS would support "Vehicle-to-X."
So, what does the "X" in "Vehicle-to-X" actually refer to?
"Vehicle-to-X" (V2X) is an umbrella term for bidirectional charging technology in electric vehicles. It encompasses four primary application scenarios: V2L (Vehicle-to-Load), V2H (Vehicle-to-Home), V2V (Vehicle-to-Vehicle), and V2G (Vehicle-to-Grid). These terms highlight the flexibility of using electric vehicles as decentralized power sources across various settings, forming a critical component of distributed energy storage systems.
- V2L (Vehicle to Load)
- V2H (Vehicle to Home)
V2H is a system that supplies power from a vehicle to home appliances. A similar concept, V2B (Vehicle-to-Building/Business), serves a comparable purpose—providing backup power during outages caused by extreme weather like cold snaps or hurricanes.
A professional V2H setup typically requires high-power DC output from the vehicle, integrated with energy storage, an inverter, and dedicated wiring for power regulation. However, without such infrastructure, a simpler form of V2H can be achieved using a V2L adapter paired with a heavy-duty extension cord.
- V2V (Vehicle to Vehicle)
V2V refers to discharging power from one vehicle to charge another. Broadly speaking, any method where one vehicle provides a charge to another can be classified as V2V. However, the optimal approach is direct DC-to-DC fast charging between vehicles, which bypasses inefficient conversion steps. This method requires specialized equipment and native hardware support in both vehicles.
Currently, most V2V scenarios rely on converting DC power from one vehicle into AC through an inverter, which is then used with a Mode 2 portable charger to provide low-power charging to the other vehicle. While this method is relatively slow, it serves as an essential emergency backup solution if a vehicle is stranded with a depleted battery.
- V2G (Vehicle to Grid)
V2G is the most complex and strategically significant application within the V2X framework. It requires vehicles to support advanced ecosystem integration and operate with dedicated V2G bidirectional charging stations. It also demands seamless coordination between the power grid, information systems, and dispatch platforms.
For vehicle owners, V2G enables "arbitrage"—charging at low off-peak rates and discharging at peak rates to profit from the price difference. For nations, V2G reduces grid load, improves power quality, and addresses the intermittency of renewable energy. While many countries have included V2G in their energy development plans, large-scale implementation remains a long-term goal, and conventional V2L adapters cannot achieve this functionality.
Now that we’ve covered these definitions, let’s return to the question at the beginning of this article: Since Tesla mentioned "V2X" in its NACS document, does that mean Tesla vehicles are currently V2X-capable?
Unfortunately, the answer is—mostly no.
Except for the Cybertruck, which launched in November 2023 with native bidirectional charging, Tesla's mainstream models—Model 3, Model Y, Model S, and Model X—do not natively support this feature.
We’ve covered this topic in detail in previous articles: except for the Cybertruck, none of Tesla’s other models are equipped with bidirectional OBC hardware, rendering them incompatible with standard discharge methods. Whether future models will include this feature remains uncertain, but for current Tesla owners, overcoming this limitation is the top priority.
The WETOX D2 brings V2X capability to Tesla models with NACS ports—Model 3, Model Y, Model S, and Model X—even without internal bidirectional OBC hardware. It supports multiple V2X applications, including V2L, V2V, and V2H, enabling you to fully leverage the value of your vehicle’s traction battery.
For more information, visit the WETOX product page on our official website for detailed features and technical specifications.
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