Watts are the biggest number on the spec sheet – and the one most often misread. A scooter advertised with “1,000 W” can have exactly the same rated power as your neighbour’s “250 W” model, and two scooters with the same 250 W can feel like completely different machines on the first hill.
How many watts does an electric scooter need?
For short flat trips, 250–300 W of rated power is plenty; holding 15–20 km/h takes only 100–150 W. Hills, a heavier rider or a loaded backpack make peak power and battery voltage decisive. Tom’s Guide’s tester, in his five buying tips: 250 or 300 W on the flat, at least 500 W somewhere as hilly as San Francisco.
Rated power and peak power – two different figures
Spec sheets often show two numbers, for example “250 W / 750 W”. The first is the rated power, also called nominal or continuous power: what the motor can deliver all the time without overheating. The second is the peak power, also called max power: what the motor can give for a few seconds at a time, when you pull away from a standstill or tackle a short climb.
Many ads only highlight the bigger number. So always compare rated with rated and peak with peak – otherwise one scooter looks twice as strong as it really is.
Where traffic rules set a power limit, it usually refers to the rated power, and the limits vary from country to country – see our guide to electric scooter laws in Europe. When you compare two commuter scooters, the peak figure usually tells you more.
Same rated power, very different scooters
Two scooters can carry exactly the same rated power on the label and still behave very differently on a hill. The Swedish tech magazine M3 has tested several scooters rated at 250 W: one that peaked at 480 W dropped to 10–12 km/h on the slightest incline with a rider of about 80 kg, while one that peaked at 800 W managed most hills in town. What separates them is how much extra power the controller lets through in short bursts.
That difference shows up as soon as the road tilts. On an 8% hill the wheel needs about 410 W to hold 15 km/h with 100 kg on board (see the table below). A scooter that peaks at under 500 W has little left once the losses in the motor and controller are counted, so it slows down; one that peaks at 800 W or more still has power in reserve.
Battery voltage plays a part too: power is voltage times current, so a 48 V scooter can deliver more power than a 36 V one without the current having to go up. How much actually reaches the wheel is decided by the controller, so treat the voltage as a clue rather than proof.
Hills and rider weight – how much power it takes
You can estimate quite well how much power your trip needs. The table shows roughly how many watts are needed at the wheel to hold 15 km/h: for 100 kg in total (a rider of about 80 kg plus the scooter) and for 120 kg in total (a rider of about 100 kg). The battery has to supply even more, because part of the power turns into heat in the motor and controller.
| Gradient | 100 kg in total | 120 kg in total |
|---|---|---|
| Flat | approx. 90 W | approx. 100 W |
| 3% | approx. 210 W | approx. 250 W |
| 5% | approx. 290 W | approx. 340 W |
| 8% | approx. 410 W | approx. 490 W |
| 12% | approx. 570 W | approx. 680 W |
Worked example with our own assumptions: rolling resistance 0.015, air resistance for an upright rider and no wind. The figures are rounded and show the order of magnitude, not what a particular model can do.
Two things stand out. On flat ground, 250 W is more than enough. On an 8% hill, though, you need 1.5–2 times what a 250 W motor can deliver continuously – that’s where peak power takes over, and where your speed drops if it isn’t enough. Slow down to 10 km/h and the same hill takes around 270 W, which is why a weak scooter crawls up instead of stopping. And 20 kg more to carry takes roughly 20% more power on the same hill.
Climbing ability on spec sheets is sometimes given in degrees and sometimes in percent, and the difference is big: 15 degrees is about 27%, a very steep hill, while 8% is just under 5 degrees. The figure is the manufacturer’s own and a best case, so expect your scooter to manage less. To find out how steep your own hill is, check the elevation profile in a maps or fitness app.
One motor or two?
Two motors – one in each wheel – give more power and better grip, because both wheels drive. You notice it on steep hills and on gravel or wet leaves, where a single driven wheel slips more easily. The price is weight, money and consumption: a dual-motor scooter is heavier to carry, costs more and draws more current when both motors are working.
Most dual-motor models are also built for higher speeds, and you’ll find them among our fast electric scooters. If you commute in town and carry the scooter up stairs, one motor is almost always the smarter choice.
More watts cost weight, range and money
It’s tempting to think “better too much than too little”. But a stronger motor usually comes with a bigger battery, a sturdier frame and better brakes – and so more weight and a higher price. The power also costs energy: if you often use the full peak power, the battery runs down faster. If you want to go far, a bigger battery – more watt-hours – is usually a better deal than a bigger motor.
More watts won’t give you a higher top speed either if the scooter is built for 20 or 25 km/h. What you get is quicker acceleration and less speed lost on hills.
What to check besides watts
The motor is only one part of the purchase. These are the points that tend to matter in everyday riding – and that are easy to miss:
- Range with a margin. Real-world range is often well below the spec sheet – Tom’s Guide’s tester, who rides in a hilly area and weighs about 90 kg, typically gets 50–60% of the advertised range. Plan for the round trip and add a margin for cold and hills. More tips in our guide on how to increase electric scooter range.
- Weight and size. If you’ll carry the scooter up stairs or take it on the bus, a few extra kilos matter more than a few extra watts. You’ll find light models among our commuter electric scooters.
- Tyres. Pneumatic tyres give comfort and grip; solid tyres never go flat. We go through the differences in solid vs pneumatic tyres.
- Brakes. More power and weight call for better brakes. Check what’s fitted front and rear, and that there are proper friction brakes – disc or drum, ideally on both wheels – not just a motor brake.
- Max load. The manufacturer’s max load covers rider plus luggage. If you weigh 90 kg with a backpack, choose a model with a margin above that.
- Rain. If you ride all year, the scooter needs to cope with splashes. What the figures mean is explained in electric scooter in the rain.
- Lock and storage. Think about where it will stand during the day – read how to protect your electric scooter from theft.
- Spare parts. Check that tyres, inner tubes and brake pads are available for the model, for example in our spare parts finder.
- Charging. Charging time and battery care are covered in how to charge an electric scooter battery.
Still torn between two types of vehicle? Read electric scooter vs e-bike before you get lost in the watt figures. If you are not sure an e-scooter is right for you at all, read electric scooter pros and cons first.
Common mistakes when comparing watts
- Peak versus rated. One model’s peak power is compared with another’s rated power, and a perfectly ordinary scooter looks like a powerhouse.
- More watts for more speed. On a scooter built for 20 or 25 km/h, the top speed is set by how it’s designed, not by the motor’s watts. The watts decide how quickly you get up to speed and how much speed you lose on hills. What else slows you down day to day is covered in our guide how fast does an electric scooter go.
- Taking the climbing figure as gospel. The manufacturer’s figure is a best case. Expect less, especially if you weigh more than average.
- Forgetting your own weight. The same scooter feels completely different with 60 and 100 kg on the deck.
- Maximum power “just in case”. The result is often a heavier, pricier scooter that uses more energy than your trip needs.
- Mixing up W and Wh. Watts (W) are the motor’s power, watt-hours (Wh) are how much energy the battery holds – and it’s the watt-hours that decide the range.
How to read a spec sheet in one minute
Say the product page shows: Motor 250 W / 750 W · Battery 36 V 10 Ah · Climbing 15° · Max load 120 kg. Here’s how to read that line:
- 250 W / 750 W: rated power 250 W, peak power 750 W. The peak tells you most about how it copes with hills.
- 36 V 10 Ah: 36 × 10 = 360 Wh of energy in the battery. That’s the figure that decides the range.
- Climbing 15°: about 27% according to the manufacturer. Expect less in real life.
- Max load 120 kg: rider plus luggage.
Write down the same lines for the models you’re choosing between, and you’ll quickly see which one suits your trip. You’ll find all models in our collection for electric scooter. If the product page only lists one watt figure, ask our customer service whether it’s rated or peak power.
