Are you planning on using one charger or several? Is it for the new 400w turnigy? That turnigy needs >15v to reach the stated 400w. Single output is 520w - Less than 13.8 * 40a = 552w or 4 outputs 13.8 * 16 = 221w each meaning you can only run 2 outputs at full capacity - 221 * 3 = 662.4w. Without knowing what charger(s) you are planning it's hard to say if it suits your purpose.
Of course, if you have already worked this out and you just want to know if it is reliable then I am not at liberty to say, sorry
