Electric motorcycle range: advertised figures versus real-world usage, how to estimate it
The advertised range of an electric motorcycle is measured under ideal conditions: moderate speed, flat terrain, and mild temperatures. In real-world use, especially at higher speeds or off-road, the actual range is almost always shorter. To determine what your machine will actually achieve, you need two key figures: the usable energy of the battery, measured in watt-hours, and your usage's energy consumption, measured in watt-hours per kilometer. This guide explains how to obtain these figures.
The essentials
- The energy of a battery is measured in watt-hours (Wh): it's calculated by multiplying the nominal voltage by the capacity in ampere-hours.
- Estimated range = usable energy divided by energy consumption in Wh per kilometer.
- The speed is the primary factor: air resistance increases very rapidly with it.
- Off-road riding, weight, cold temperatures, and an aging battery all contribute to reduced range.
- The most accurate data comes from your own measurements, taken on your specific route.
The key figure: watt-hours
The specifications often list the voltage (in volts) and the capacity (in ampere-hours) of the battery. To compare two batteries, you multiply the two values together: this gives you the stored energy, in watt-hours. A battery with a voltage of 80V and a capacity of 45Ah stores 3600 Wh, just like our Performance (S) battery for Talaria TL3000 and TL4000. Comparing only the ampere-hours of two batteries with different voltages can be misleading. Our guide on how to calculate battery capacity in Wh details this calculation.
Not all of the rated power is usable: the BMS (Battery Management System), the circuit board that protects the battery, cuts off power before the cells are completely empty, and the voltage drops significantly under heavy current at the end of the charging cycle. Expect a usable power output that is slightly lower than the nominal value.
What affects battery consumption?
Speed
Air resistance increases with the square of the speed, and the power required to overcome it increases with the cube of the speed. Therefore, doubling the speed on a flat surface more than doubles the energy consumed per kilometer. This is the main reason why range decreases significantly at higher speeds on the road.
The terrain and riding style
Off-road, the machine constantly accelerates, brakes, and climbs. Each acceleration and uphill climb consumes energy; regenerative braking only recovers a small portion of it. Soft ground (sand, mud) adds significant rolling resistance. Smooth riding consumes considerably less energy than riding with frequent acceleration.
Weight and tires
A heavier rider, a bag, or a passenger: each kilogram requires more energy when going uphill and during acceleration. Under-inflated tires or tires with aggressive treads increase rolling resistance.
Battery temperature and age
A cold lithium battery delivers less power and its voltage drops more significantly under load. In winter, the range decreases. A battery that has undergone many charge cycles has also lost some of its capacity.
Here's the method for estimating your range:
- Calculate the energy of your battery in Wh, and then subtract a margin to account for unusable energy.
- Measure your energy consumption: Many controllers, connected battery management systems (BMS), and displays indicate the amount of Wh (watt-hours) consumed. Perform a standard route, record the distance and the energy used, and then divide one by the other.
- Divide the usable energy by this consumption: this will give you a realistic range for that usage.
- Always keep a reserve: do not plan to return the battery completely empty.
Example calculation: With 3000 Wh of usable battery capacity and a measured consumption of 50 Wh/km, the range is approximately 60 km. If the consumption doubles with faster riding, the range drops to around 30 km. The consumption figures depend entirely on the specific machine and how it's being used: only your own measurements are relevant.
| Factor | Effect on battery life | Here's what we can do: |
|---|---|---|
| High speed | Significant decrease | Reduce speed on long stretches of road |
| Off-road, acceleration | Decrease | Smoother handling, gentle driving mode |
| Weight | Reduced performance on inclines and during acceleration | Reduce the load |
| Cold | Decrease | Store and charge the battery indoors |
| Old battery | Sustainable decline | Have the battery capacity checked |
Gain range
There are three levers you can use: consume less energy (by reducing speed, adjusting riding style, ensuring tires are properly inflated, and using a gentler riding mode), maintain battery health (by storing the battery at a mid-charge level and protecting it from the cold), and increase the energy capacity with a more powerful battery. The latter choice has consequences for weight and size, which are detailed in our guide on upgrading the battery for Sur-Ron or Talaria. The same principles apply to electric scooters, as explained in our guide on the actual battery range of an electric scooter.
Workshop tip
Do not judge a battery based on a single ride: note the consumption over multiple routes, at different temperatures. If the battery range drops drastically from one week to the next, without any change in usage, have the battery checked: an unbalanced group of cells or a connector that overheats may be the cause. Our motorcycle parts are in the electric motorcycles category.
Frequently Asked Questions
Why is my range significantly lower than the advertised figure?
The announced range is measured under ideal conditions. Sustained speed, off-road riding, weight, cold temperatures, and an aging battery all significantly reduce the range, sometimes drastically.
Are ampere-hours sufficient for comparing two batteries?
No, only if they have the same voltage. To compare, multiply the voltage by the capacity: this gives you the watt-hours.
Does regenerative braking significantly increase the range?
It recovers some of the energy during braking and when going downhill, but only a portion of it. It is most helpful in mountainous areas and in the city, and much less effective on a regular, flat route.
Does cold weather damage the battery?
Cold weather reduces the available power output. Conversely, charging a lithium battery that is very cold should be avoided: allow it to return to room temperature before plugging it in.