Electric trucking just got a major improvement. Tesla’s new V4 Cabinet delivers 1.2MW charging power specifically designed for the Tesla Semi, marking a significant leap in commercial electric vehicle infrastructure.
The V4 Cabinet represents Tesla’s most powerful charging system yet. It can charge passenger cars at 500kW and Tesla Semi trucks at 1.2MW. The system supports vehicle designs ranging from 400V to 1000V, making it compatible with various electric vehicles.
Tesla Semi stands alone as the only large vehicle currently capable of using the full 1.2MW charging capacity. This high-power charging addresses electric trucking‘s biggest challenge: travel range for ultra-long distance cross-country routes. The capability could position Tesla Semi as a legitimate alternative to diesel long-haul trucks.
Tesla Semi’s exclusive 1.2MW charging capability tackles electric trucking’s range limitations, potentially rivaling diesel trucks for long-haul routes.
The new cabinet delivers impressive advancements over previous generations. It features three times the power density compared to older systems, enabling higher throughput while reducing costs. Each cabinet powers eight charging posts, doubling the number of stalls compared to previous versions.
This configuration can be fine-tuned specifically for Semi charging at 1.2MW or shared across eight posts at 1MW for passenger cars.
Tesla’s charging technology has evolved dramatically since 2012. The company’s first Superchargers offered just 90kW. V2 Superchargers reached 120-150kW. V3 Superchargers hit 250kW with improved cable design and liquid cooling.
The new V4 Cabinet represents a 150kW improvement over the most powerful DC fast chargers currently operating. The system is designed to be the most reliable supercharger on the market, featuring next-generation hardware with cutting-edge power electronics.
For passenger vehicles, the system maintains 250kW charge rates for Model S, 3, X, and Y. Cybertruck owners will see 30% faster charging compared to previous systems. These speeds allow drivers to add up to 200 miles of range in just 15 minutes. Only the Cybertruck can charge at 325 kW as of the 2026 model year lineup.
Implementation begins in Q3 2025 according to Tesla’s specifications. The first V4 Cabinet sites entered permitting in November 2024. V4 posts have been set up since 2023 but required the new cabinet to release their full potential.
The reduced footprint and lower installation complexity should enable faster network expansion worldwide.