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my first post here!, anyway,
id be careful with peltiers,
i have had a fair bit of experience with them (computer cooling)
most that i have seen are 15v 20a units (they are more efficient at around 12.5 however) its best to get a dedicated power supply for them or you will find the wiring getting hot to the touch, melting then frying the power supply and possibly whatever you were trying to cool in the first place.
meanwell make the best peltier power supplies.
keep in mind the heat generated by the peltier unit, air cooling a peltier is usually really inefficient. heat generated = the wattage of the peltier + the wattage of whatever your cooling, then you have the worry of condensation unless you fabricate a peltier controller (or buy one) and for the cost of getting all that going you could just put a larger heatsink on it or a fan that pushes more air. or even watercool it.
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