You're looking at the wrong parameter. You are interested in suction power or efficiency class of vacuuming. Power 1800W is the power taken from the network (in large part converted into heat), and the turbine efficiency, housing design, etc., influences the pulling force, hence the 2000W vacuum cleaner can have 300W suction power (as decent), and a better-conceived model can have 330W at 1300W.
As I wrote, you have to determine what will be vacuumed and choose the highest efficiency class for this application. In addition, if good filtration is important to you, you also need to pay attention to its class. Jupiter seems to have good parameters at a decent price, but look at other models and see the parameters I wrote about, you will surely find some compromise.
Below Class C, I would not go down, the trade-off between price and efficiency may be parameters A - hard floors, C-carpets, energy class A / B and noise level not more than 80dB. I will not look for specific offers for you, finding the best models at the best prices is yours.
I read but I do not want to spend 6 hours finding the average quality of equipment that will allow me to vacuum my apartment without any problem. Last time just looking in this way I bought a crappy Zelmer, who has sucking on the level of kindergarten and I am looking for a vacuum cleaner that has a strong pull or high engine power. And that's it.
If you want something reliable, you can always repair it and there is an option to buy parts, eg in the home appliances clinic, Tefal in the TW6886 model guarantees 10 years of availability of spare parts.
Regarding 1,800 W of power - since changes in regulations in the EU, it is probably no use to suggest such powers. It's better to look at the performance label. The mentioned Tefal TW6886 on paper looks quite interesting.