I’ve done a load of single sided testing with my Stages L and simply divided by two to get an actual wattage. My results for my Kickr Core consistently read 10-15% low compared to two separate Stages units. With the Neo 2 the difference is consistently 2-3% low.
My FTP in ramp tests also shows a large difference when using the Core vs the Neo. The Stages deviates a little.
Now I’m not going to claim that I know how Stages works out their power figures, but I’m pretty sure you can simply divide a period of smooth single leg pedaling to get a basic idea of what’s going on.
I think it’s ridiculous that power meters and trainers have claimed accuracy figures that often don’t add up. The average punter doesn’t have the time or the equipment to test several power sources to isolate a problem.
Yeah, you can pick one and get on with the training. That doesn’t mean you shouldn’t reject the faulty units and demand a refund.
What’s the point of paying big bucks for accuracy if it’s not accurate?
The OP should try and compare the Kicker to other dual sided power meters to see if it shows a discrepancy. We should really try to help each other out in this regard if possible.
(This isn’t directed at you specifically Chad. It’s a general comment and your quote was relevant).