Charging time depends on the battery energy you need to replace and the charging power the motorcycle can actually accept. There is no reliable four-hour average that applies to every electric motorcycle. Check the exact model, charger, supply and starting battery percentage.
A useful first estimate is energy to add in kWh ÷ average charging power in kW = hours. The real session can take longer because power changes during charging, and energy is lost in the process.
A worked example
Imagine a motorcycle with 6 kWh of usable battery capacity, starting at 20%, with a target of 80%. It needs to store approximately 3.6 kWh: 6 × (0.80 − 0.20). If average power into the battery were 1.8 kW, the idealised calculation would be 3.6 ÷ 1.8 = two hours.
This is an illustration, not a charging claim for a particular bike. A charger’s maximum rating is not necessarily its average output throughout the session, and published battery capacity may not equal usable capacity.
| Charge window | Energy to add | Idealised time |
|---|---|---|
| 20% to 50% | 1.8 kWh | 1 hour |
| 20% to 80% | 3.6 kWh | 2 hours |
| 20% to 100% | 4.8 kWh | 2 hours 40 minutes |
The final row is particularly likely to differ from reality because charging may slow near full. For everyday planning, use the manufacturer’s stated charging window and measured experience with your own setup.
What does Stark quote for the VARG EX?
Stark’s current EX specification lists a 3.3 kW, 16 A, 120/240 V charger and quotes two hours at 240 V or 3.5 hours at 120 V. These are manufacturer figures for the stated setup, not a MotoEbikes timed test. See the official VARG EX technical specification.
A UK household socket and a 16 A supply are not interchangeable assumptions. Confirm the supplied UK plug, required circuit and permitted charging setting for the exact bike. Do not assume a charger can draw its maximum rating from any socket or adapter. Our VARG EX buyer’s guide covers the wider ownership questions.
Why can charging take longer?
- Lower available power: the supply, charger or bike may limit the session.
- A different starting percentage: a short top-up and a near-empty battery require different amounts of energy.
- Temperature: battery management can limit or pause charging outside the approved conditions.
- The final part of the charge: power can reduce as the battery approaches full.
- Equipment or battery condition: faults and degraded components need diagnosis rather than a faster charger.
Will a public rapid charger make it faster?
Only if the motorcycle supports that charging system. A high number on a public charger does not make it compatible with a bike that uses a dedicated portable charger. Connector shape, electrical system, communication and manufacturer approval all matter. Check compatibility before planning a route around public charging.
How much range will a short stop add?
Energy added and mileage gained are different quantities. At an average 1.8 kW, a 30-minute session adds approximately 0.9 kWh before considering where that power is measured and any losses. How far that takes you depends on consumption. A slow trail and a fast road journey can use that energy very differently.
Plan charging around your actual day
Write down your usual starting charge, riding distance or session duration, and the battery percentage remaining afterwards. Record how long your next charge takes on your actual supply. A few comparable sessions are more useful for planning than an unmatched headline range or recharge claim.
For equipment, charging location and the connection sequence, read how to charge an electric motorcycle. If you are checking a bike before purchase, ask us to confirm its UK charging requirements.
Sources and calculation method
Checked 12 October 2026. The Stark example comes from Stark Future’s current EX page. All other numeric examples are explicitly illustrative calculations. Follow the model’s current owner manual, available through Stark support.
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