From the 1st of September, manufacturers will no longer be allowed to make or import vacuum cleaners that exceed 1600 watts within the European Union.
Just a few months ago when I was looking for a vacuum cleaner to replace a falling-apart Dyson, I couldn’t get over the crazy wattages some models were reaching. The model I ended up going with was a Henry rated at just 1200 watts. We mainly operate it in its 600W eco mode, which is plenty and seems to suck more dirt out than the previous Dyson.
For example, with a quick look at Amazon UK’s top-selling vacuum cleaners, there is a VonHaus 2400W. My Dad’s electric concrete mixer has a 600 watt motor and has no problem mixing several wheelbarrows of heavy concrete and here we have a vacuum that uses 2400 watts just to suck up dust!
According to the Expert Reviews site, most vacuum cleaners over 1400 watts are very inefficient, where the rated wattage ends up being a marketing figure and little to do with its actual suction power.
Further info in this article.