Scooter Power Description
Power for electric scooters is usually measured in watts.
A human climbing a flight of stairs is doing work at the rate of about
200 watts. A first class athlete can work at up to
approximately 500 watts for 30 minutes. An automobile engine
produces mechanical energy at a rate of 25,000 watts (approximately 30
horsepower) while cruising.
One horsepower equals 746 watts
Electric scooter motors and controllers handle power
differently for continuous riding versus short-term
‘peak’ riding moments.
The more watts your electric scooter's motor can produce the
better buffer you have for expecting ‘cool running’
and long term reliability.
The electric scooter's motor controller is an integral part
of an electric scooter’s power capabilities. No matter how
powerful the motor is (watts capability) it will perform at no greater
level than the controller allows. No matter how powerful the controller
is that is connected to a electric scooters motor, the motor
will not perform greater than it’s designed parameters unless
the voltage is raised above it’s design parameters, which
will result in motor failure.
The range of an electric scooter is determined by how many
watts are required to complete the journey.
Watts can be measured by multiplying the battery voltage by
the amount of current (amps) that are required to do the work. The
harder the work … heavy rider/scooter, fast speeds, hill
climbing, many stops and starts.. the more amps that are used, the more
It is best to purchase a scooter that exceeds your needs
rather than meets your needs, as the one that meets your needs is
probably being run near the ‘red line’.
The power rating of an electric scooter's motor is determined by its
operating voltage (volts) and on its current handling capacity (amps)
at that operating voltage. The unit of measure is the
Usually an electric scooter motor can handle significantly
more power (watts) for a short period of time versus operating
The amount of power a motor can handle for a short period of
time (seconds or minutes) is called ‘peak’ power
and the amount of power the motor can handle continuously (hours
– days) is called ‘continuous’ power.
The higher the wattage of the motor the higher the voltage or
current has to be.
The device that must supply the motor with all the voltage
and current it needs (watts) is the battery.
A electric scooter motor powered by a battery has a capacity
limited to the power capacity (voltage x current output per hour
‘ah’) of the battery.
An electric scooter motor is an electro-mechanical device
that by design is limited to the amount of current (amps) it can draw
The input power of a motor is simply the amount of wattage it
takes to operate.
The output power of a motor is the amount of wattage the
scooter's motor offers towards doing work.
The ratio of input power to output power if called the
efficiency of the motor. One obviously hopes to get as much power out
of a motor as ones put into a motor, but there are no 100% efficient
motors. The higher the efficiency the better.
The power lost between input power and output power turns up
as heat. Heat is an enemy to all motors and can lead to breakdown if
not kept within safety limits.
If a motor can be cooled effectively its power rating can be
pushed above normal operating limits.
Electric Scooter Batteries
Sealed lead acid batteries are the corner stone of the electric vehicle
market, but they are also its greatest limiter for expanding
SLA are like car batteries except their is no liquid acid to spill and
corrode. They use a 'paste' and the unit is sealed with nothing other
than the terminals exposed.
If you want reliability, simple charging, and power at a cheap price,
they are the only game in town. They take up a lot of space, however,
and one gets into 'diminishing returns' by adding more and more
batteries for more range. The extra weight eventually negates the extra
The average automobile trip by US drivers is 7.5 miles round trip. Most
quality electrics have that range and many have twice that range.
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