We must connect the peltiers in series to make it works at the same time, is this right?????


Joined Aug 21, 2017
Not exact!
Firstly, as more to the topside stays this Peltier section, the less it demands a Wattage. Any construcytion with equal Wattage to each element will overstress the upper and understress the bottom layers in stacking.
Secondly, the euivalent resistance of Peltier is sharply dependent on temperature, thus each will have an another voltage and another current in the result. Thus, there are no better choice as to produce a separate PS for each.