What exactly are you trying to do with your project?
Use the Peltiers to generate electricity or use them to generate heat and cold?
Do you realise the peltier figures you quote are for electricity generation not temperature?
Your talk about reversing and controlling the voltage makes me think you are going to use them for temperature and if so the amperage you quote is WAAAAY below what you need to run them.
Quick search shows currents of up to 9 amps per unit to generate around 25 degrees difference.
Daz