Skip to content
Free Shipping & Returns*
Specialist Workshop Near You
Free Shipping & Returns*
Specialist Workshop Near You
Language

kilowatt hour (kWh)

The kilowatt-hour (kWh) is a unit of measurement for energy . It indicates how much electrical energy is consumed or stored when a power output of one kilowatt (kW) is used for one hour .

What exactly does kilowatt-hour mean?

One kilowatt hour corresponds to:

  • 1,000 watts of power for 1 hour

  • or, for example, 500 watts for 2 hours

Important:
The kilowatt-hour does not measure power , but rather the amount of energy that is converted or stored.

For e-bikes, the kilowatt hour describes the battery capacity and is therefore a key factor for the range .

Typical battery sizes:

  • 400 Wh (0.4 kWh) – compact batteries for short distances

  • 500 Wh (0.5 kWh) – standard for many e-bikes

  • 625–750 Wh (0.625–0.75 kWh) – for long tours and plenty of support

The higher the kWh rating, the more energy the battery can store – and the longer the motor can provide assistance.

E-bike battery

Relationship between kWh, range and consumption

The actual range of an e-bike depends not only on the kilowatt-hour, but also on:

  • Support level

  • Driver weight

  • Terrain (flat vs. mountainous)

  • Cadence

  • Tire pressure and wind

A rough guideline:

  • Depending on conditions, 1 kWh of energy allows for a driving range of approximately 80–200 kilometers.

  • kilowatt hour and electricity costs

    The kilowatt hour is also used to bill electricity costs .
    Example:

    • An electricity price of €0.35 per kWh

    • An e-bike battery with 0.5 kWh

    • Cost per full load: approx. €0.18

    This makes the e-bike one of the most cost-effective means of transportation available.

    Distinction: kW vs. kWh

    • Kilowatt (kW) → Power (how hard something works)

    • Kilowatt hour (kWh) → Energy (how much is consumed or stored in total)

    In the e-bike sector:

    • The motor's power is specified in watts or kilowatts.

    • The battery capacity is specified in watt-hours or kilowatt-hours.

    • Conclusion

      The kilowatt-hour (kWh) is a key metric for e-bike battery capacity . It significantly determines range, operating time, and charging costs. Anyone wanting to compare or realistically assess e-bikes cannot ignore the kWh rating.

pedal power
Big Bike

Published: February 9, 2026  |  Updated: February 9, 2026