Arlo1 wrote:But... If you applied all that to a controller with 4110 fets it would be so much better!
+1.. it would be a current dumping monster.
If you want to drive a really stinking large, hi-rpm per volt motor like say, my motenergy 4201, or something even bigger than that, then you need crazy amps.. on the spec sheets of the FETs, the rdson is about double for the 4115 controllers meaning that they can handle somewhere around half the current.
The more cells you have, the more balancing and charging is a pain in the ass. That's why i ditched my magic pie setup.