12v dehumidifier

blaczero wrote:
Do they exist?

I am sure there are some out there, but..

Most "12V" items like this are nothing more than toys and will only draw 4oz-8oz (1 cup-1 pint)of water per 24hrs.

Peltier or solid state cooling devices do exist, apply 12V and one side gets cold and the other side gets hot.

The caveat with Peltier devices is they are absolute power hogs and they are quite limited in size and how much cooling (the fins must cool below the ambient air temp without freezing to condense moisture out of the air) you get and are highly dependent on the ambient air temp on how effective they are.

Buy the smallest 120V compressor based dehumdifier you can find and use a inverter, they work better than any battery powered dehumidifiers you will find.