Before you look at the power in detail, you should assess what work you want to do with the leaf blower or leaf vacuum. If you buy a more powerful device, you can use it not only to collect leaves, but also small branches.
As a general rule, petrol engines with fewer watts can deliver the same performance as high wattage electric leaf vacuums and leaf blowers.
An electric leaf vacuum should offer around 2000 watts to easily loosen the leaves from the ground and suck them in. A leaf vacuum with a petrol engine works differently again, so it is sufficient if it has 0.75 kilowatts. The combustion engine is more efficient in itself, but not more environmentally friendly. You can therefore choose a device with less power without hesitation and achieve the same speed.
Battery-powered devices have the lowest power. While manufacturers use modern and equally reliable batteries, they often have to sacrifice performance to ensure adequate battery life. Also, when choosing a blower, keep in mind that different units of measurement apply depending on the design:
For leaf blowers that use an electric drive, the power is always expressed in watts (W).
For leaf blowers with a petrol engine, the power is always defined in kilowatts (kW).
The higher the engine power, the higher the speed. A leaf blower that has a power of 2500 watts can reach up to 300 kilometres per hour (km/h) of air speed during operation, which is an almost unimaginable speed. A device with a motor with 3000 watts of power is for real professionals and even reaches a speed of 418 km/h.