Charge Curve vs. Peak Power: The Number That Matters More
Two EVs can both claim 250 kW and charge completely differently. The shape of the curve — not the peak — decides your coffee break.
Peak charging power is a marketing number; the charge curve is the reality. A car that hits 250 kW for five seconds then collapses to 80 kW can lose a real-world race against a car that holds 180 kW across the whole session.
How to compare honestly
- Look at 10–80% time on the same charger power class.
- Check average power between 10% and 60% — that's where most of the session happens.
- Ask about preconditioning: a warm battery can double sustained power in winter.
Why curves differ
Manufacturers tune curves to protect the pack. Cell chemistry, cooling capacity, and even warranty targets shape how aggressively a car will pull power. Two cars with identical cells can ship with completely different curves because one maker chose longevity over showroom specs.
Sources
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