Those best guess figures are fine for manually chlorinated pools but don't apply to SWG pools as the water through the cell is superchlorinated when the cell is energized as opposed to having the kill zone within the pool itself.

At least according to PoolSean and the AquaRite people.

I've had the AquaRite for several years now with CYA at 70-80ppm, chlorine 1-2 with absolutely no problems. No point in wearing out a $400 cell prematurely by increasing the chlorine higher than the recommended value of 1-3.