[MetalMan]

3000watts sure is a lot! nbcaz, amps aren't everything. What really matters is the power (watts) that are put out, and then the voltage that is put through it. For example, a Feigao 7XL will pull 94 amps on 16 cells (accounting for voltage drop) when taking in 1500watts (output would be ~1350watts including 90% efficiency). A Feigao 12XL will pull 51amps on 27 cells (1.10v each cell) when taking in 1500watts, and since this would be a more efficient setup than the 7XL, it will be able to put out more power. So, if you have higher voltage you don't need a lot of amps.