How volts, amps, watt-hours or wattage affect e-bike performance?
The terminology for electric bicycles, especially battery and motor, may seem a bit overwhelming at first but we will try to explain it in simple words.
● Volts (V) measures the force of electricity flowing through the electric wires. More volts means more power!
● Amp-hours (Ah) is the amount of electricity flowing through the wire. To measure the true energy capacity of the battery, you will need to consider the voltage and amp-hours together.
● Watt-hours (Wh) is a combination of Ah and V that describes the total energy delivered to your motor system. Think of Wh as how much fuel you have in the tank – the higher the figure – the farther you can travel.
● Wattage is a measure of the power that the motor produces. When looking at the motor performance, it is important to distinguish between two types of power:
➔ Nominal (or rated) power is the amount of power the motor can produce continuously;
➔ Peak power is the power a motor can produce for short periods, such as from stopping position.
350W nominal power is sufficient for medium-sized hills (2% grade). We recommend going with at least 500W to conquer bigger hills of 4% grade.
The “brain” of the e-bike system is the controller (do not mistake it with the LCD display). The controller connects all electric parts of the bike and determines how much assistance to provide (for example, riding on a flat road does not require as much power as going uphill). The latest eJOE bike models are equipped with 48V batteries and 500W (nominal) motors – it has proven to be the optimal combination to deliver great bike performance for various types of rides.