723Views6Replies

Author Options:

connecting peltier element to 12v car socket? Answered

I have 150W peltier element, and I plan to build a mini  fridge for my car, so I was wondering if its safe to just directly connect peltier element to 12v car cigarette socket with 2 in parallel attached cpu cooling fans (12v 0.15A). Can it be done, or any other sugesstions?

6 Replies

user
steveastroukBest Answer (author)2012-06-28

Mmm. Check the fuse on the socket. You need at least 12.5 amps, and it may surge higher.

Select as Best AnswerUndo Best Answer

user
xtony666 (author)steveastrouk2012-06-28

Is there another solution, can I put something like a potentiometer or a resistor to lower the power of the peltier or someting like that?

Select as Best AnswerUndo Best Answer

user
steveastrouk (author)xtony6662012-06-28

The BEST method would be to buy a switch mode supply.

Select as Best AnswerUndo Best Answer

user
xtony666 (author)2012-06-28

Thank you all for your answers, I think it's the best and safest to buy a switch mode supply then :)

Select as Best AnswerUndo Best Answer

user
verence (author)2012-06-28

As steveastrouk said, check the fuse of the socket you want to use. If the rating is too low, do not just insert a bigger fuse. The rating was chosen by the car manufacturer for a reason. A bigger fuse might withstand the current but it might then fail to protect the wiring. In worst case, you may start a cable fire. If the fuse's rating is too low, run extra wires (thick enough) from the battery and don't forget a (bigger) fuse.

12A is a lot of current and will drain your battery in no-time. So make sure the fridge is only on when the engine is running

Select as Best AnswerUndo Best Answer

user
mpilchfamily (author)2012-06-28

Yes you can connect it to your car's electrical socket without any problems.

Select as Best AnswerUndo Best Answer