Shortly after A2Z, a leader in charging solutions, promoted its new NACS extension cord, Tesla’s top Cybertruck engineer sounded a note of caution. He advised against using any type of extension cable at Superchargers, raising significant safety concerns.
According to Wes, the engineer, connecting any extension cord to a liquid-cooled DC charger cable could lead to thermal imbalance. He noted instances of overheated cables and short circuits due to this practice. While some have found that wrapping the charging handle with a wet towel speeds up charging rates, Tesla has long advised against this method.
Speculating on why a wet towel might expedite charging, many suspected the presence of a temperature sensor in the connector itself. Wes confirmed this, explaining, “There’s a temperature measurement in the handle, and the supercharger derates based on that temperature.” An extension cord could introduce additional heat and bypass this safety mechanism, compromising the system’s integrity.
Despite this, A2Z proudly markets its $300 extension cord, highlighting its suitability for “NACS DC chargers”. The cord boasts impressive specifications, including a 300A current rating, a 500A boost rating, and built-in thermal sensors for automatic temperature regulation and shutdown. A2Z has even integrated a supporting structure to keep the connector and cord off the ground, mitigating potential charging station damage.
In response to Wes’ concerns, A2Z insists that its extension cords incorporate the same safety mechanisms as Supercharger connectors. However, Wes still advises patience, suggesting Tesla’s forthcoming V4 Supercharger cables, which will feature longer reach. Although these new Superchargers are not yet widely available, the debate over the NACS extension cord’s safety and efficacy is only beginning. At over $300 without any discounts, A2Z’s solution is a costly venture awaiting broader acceptance and scrutiny.
Stay tuned as both A2Z and Tesla iron out the best practices for safer and more efficient charging solutions.
