Rated power vs Peak power, how to calculate peak power
CHINEBIKE 2026 : Ride Safer,Ride Smarter.
CHINEBIKE 2026 : Ride Safer,Ride Smarter.
  1. Rated power (continuous power)

    The standard power calibrated by the manufacturer for the device to work stably for a long time without overheating or damage; it can operate continuously safely.

  2. Peak power (maximum power)

    The instantaneous limit power that the device can output in a short burst, only sustainable for a few seconds. It cannot run at this level for a long time, otherwise the motor and controller will burn out.

Two common calculation methods for peak power
  1. Calculate by voltage and peak current (most used for electric vehicles and motors)

    Formula:

Example: 48V battery with 30A controller current limit

Peak Power = 48 × 30 = 1440W

Its rated power may only be 500W or 800W, but it can instantly reach 1440W for start-up and climbing.

  1. Estimate by multiplying rated power by peak coefficient (industry empirical method)

    General standard:

    Ordinary motors & electrical appliances: Peak power ≈ Rated power × 1.5～2

    Electric scooter motors: Peak power ≈ Rated power × 2～3

Example: 500W rated motor calculated at 2.5 times

500 × 2.5 = 1250W

Simple summary
  1. Accurate calculation: Battery voltage × Controller maximum current limit = Peak power
  2. Rough estimation: Rated power × 2～3 times = Peak power

    Rated power is long-duration running capability; peak power is short burst acceleration performance, which can only be used momentarily.