I have selected the variety " vietnamese white" for commercial purposes and the heaviest fruit I had so far weighted 1,360kg. Average weight is 700-800gr and when I take off fruits from branches and leave only one I usually get fruits around the kilo.
Here is a couple of pictures of my commercial dragon fruit orchard ( vietnamese white ).
Season started a few weeks ago and it is the second wave that is blooming right now. Fruiting will last until mid april here in New Caledonia.