My lcd3 uses the older C5 programming and reduces current by 5a max in 0.5a increments, all I can say with my lcd is as long as P3/1 is set then current and watts in the 5 levels are noticeable.
Typically the PAS levels %'s are 13, 20, 33,50 & 100.
The later software only has 8 incremental...