I’ve not read this paper fully but I suspect it’s referring to lab testing, or panels produced in small numbers and 10x the cost of all other panels. Mine were REC240PE for reference.

Edit: that chart is titled “Best Research-Cell Efficiencies” so this is lab testing and it’s exactly the point of this thread… “35% Efficiency, Why is this not in stock at Costco!?!”

[–] Eheran@lemmy.world 3 points 2 weeks ago (1 children)

You are correct! Sorry for mixing this up. I must have looked at research Numbers back in the day and simply used that as my reference now, which of course is then correct if look at research again...

[–] manualoverride@lemmy.world 3 points 2 weeks ago

No problem, I remember researching the available panels at the time and selecting the most efficient and playing panel Tetris to get the most possible on the roof.

In the end the installer did a last minute switch, but although the panels were not the best available they were pretty close. The most annoying thing was that the panels were slightly different dimensions and the installer insisted in wider margins around the panels so I ended up with several fewer panels overall, ruining my carefully planned layout.