The article analyzes how winter conditions affect DC fast charging in New York City, comparing Tesla vehicles with non-Tesla EVs. Across a temperature window from roughly 10°F (-12°C) to 45°F (7°C), Teslas maintain a relatively steady session-average charging power, while non-Tesla cars charge more slowly, especially when it’s cold.
The difference is modest but meaningful for drivers relying on 30-minute charging sessions. This blog distills the key findings, the role of battery temperature and preconditioning, and what it means for drivers and the future of fast charging.
Winter charging performance in NYC: what the data show
In the study, Tesla session-average power remains roughly stable at about 62.5–67.5 kW across the 10°F to 45°F range. By contrast, the non-Tesla group averages sit lower, around 50–60 kW, and tend to drop more noticeably as temperatures fall below freezing.
The gap is typically 10–20%. A 30-minute session at 65 kW delivers roughly 32.5 kWh for Tesla cars, versus about 25–30 kWh for many non-Tesla vehicles.
Small differences in power translate into meaningful differences in energy delivered over a charging session.
Temperature and charging power
The primary technical explanation is that battery temperature sensitivity limits how much DC fast charging a pack can accept when it is cold. Most battery chemistries do not tolerate high-power charging if they are not adequately warmed, making active preconditioning before a fast charge critical to achieving higher throughput.
This is especially true for late-model packs that rely on aggressive preheating to reach an optimal operating temperature faster.
Tesla’s edge: preheating and charging techniques
Experts attribute Tesla’s relative advantage in cold weather to strong preheating while navigating to chargers and, for LFP batteries (lithium iron phosphate), an exclusive AC ripple current technique that speeds warm-up. These methods help Tesla keep power acceptance higher even when ambient temperatures are low.
In industry discussions, Max de Zegher, Tesla’s Director of Charging North America, highlighted that cold-temperature performance is essential to achieving high utilization and short wait times in Q1 2026.
Non-Tesla variability and room for improvement
Many non-Tesla EVs also offer preconditioning and can sometimes match or exceed Tesla performance, particularly newer models. However, the non-Tesla group in the dataset may include older vehicles with less effective preconditioning, which can skew averages downward in cold conditions.
The report cautions that several factors—driver behavior, session length, and fleet composition—affect the statistics. Individual experiences can vary significantly depending on hardware, software, and charging infrastructure context.
Implications for EV drivers and charging planning
For drivers who operate in cold climates, the data offer practical takeaways about preconditioning and charger selection. To maximize charging efficiency in winter, consider the following:
- Precondition the battery en route to a fast charger to raise the cell temperature before plug-in.
- Plan around battery chemistry decisions, noting that LFP batteries may benefit particularly from warm-up strategies that use ripple charging techniques.
- Be aware that session length and charger-to-vehicle compatibility can influence the energy delivered in a given time window.
- Recognize that Tesla’s current practices may yield consistently higher per-session energy transfer in cold weather, though newer non-Tesla models are narrowing the gap as preconditioning improves.
Caveats and interpretation
The report emphasizes that many variables affect charging performance, including driver behavior, trip profiles, and fleet mix. While the data point to a measurable advantage for Tesla in extreme cold DC fast-charging, they do not establish a universal rule.
Individual charging sessions may diverge based on battery state of charge, charger availability, and software updates that optimize thermal management and power delivery.
Looking ahead: what this means for the future of fast charging
Overall, the analysis suggests that preheating practices and specific charging techniques enable Tesla to retain an edge in extreme cold DC fast-charging.
As automakers continue refining preconditioning routines, thermal management systems, and charging algorithms, the gap between Tesla and non-Tesla charging performance in winter conditions may continue to narrow.
For the industry, thermal readiness and smart charging strategies are as crucial as raw charger power in delivering reliable, rapid charging for a growing fleet of electric vehicles.
Here is the source article for this story: Supercharging Power in Cold Weather: Tesla vs. Non-Tesla EVs