I am quite new to Zwift and couldn’t find the answer here in the forum. I usually ride 2,0 watts /kg. I don’t understand the logic of Robo Pacers. I assumed that if I joined a Robo Pacer going 1,5 watt/kg, the system would calculate on the basis of my own watt. Instead I find that I have to output 2,0 watt/kg, if I want to keep up with a Robo Pacer that rides 1,5 watt. Is this normal? Is this because I am a lighter rider and the Robo Pacer rides the watts of an average weight rider? Does that in turn mean, that if I want to ride on 1,5 watts /kg I‘d rather chose a Robo Pacer which rides 1,1 watts. I really don’t get the point. Aren‘t Robo Pacers supposed to help you riding your own 1,5 watts, for example? Or did I chose the wrong settings somehow?
Yes, the w/kg of the Pacer is what power the Pacer is putting out per kg of their own weight, so their total power depends on the Pacer’s weight. You’re right that if you are lighter than the Pacer then you’ll have to put out a higher w/kg to keep up, although drafting (either by you or the Pacer) will also alter your/their speed.
I can’t remember how much the Pacers weigh but I think it’s around 72kg or so (someone will no doubt be able to say the exact weight).
Also make sure you are using a road bike that can benefit from the draft. TT bikes will not draft, MTB and Gravel bikes are slower on pavement than road bikes (but faster on dirt)