Higher voltage = lower AMPs used to get the same power of a lower voltage set up. Lets say your properly geared vehicle is making 1200watts peaks with 3S then the system is peaking at around 108A+- a few. Now on 6S your system will peak at 54A+-. Now we all know a lot of system will peak much higher, but the average A will be lower with the 6S then with the 3S (In my case it is
). I still haven't run my 1521/1.5Y with 10S in my BPP truggy as I'm having some fun with the 1521/1Y with 6S, plus I'm still testing how good the Kong Power 5000mAh 3S packs are.