Venting humidity from the cabin

are you running a/c?

 

if you're not running the engine or hvac, you would need a fan set up to the battery vent or cracked window. not sure how effective it would be though.

 

On our cross country trips I carry a rechargeable jump starter along with a portable air compressor in case of emergency. It also can be used to power other things. How about getting a small, portable dehumidifier and powering it all night from that? That way it won't tax the car's systems.

 

Did you find a dehumidifier? Most use a compressor so actually use a lot of power and will drain the 12v battery very quickly.

However you can run the fans built in to the car with the car off, using this info:

Prius camping

I like this mod, and need to look into how to run it off an external 12v (alternatively, get a new 12v if yours is worn and carry a jump pack just in case. I have jumped my car from a tiny 7ah 12v house alarm battery before so even one of those, kept charged, could be a good emergency jump pack!

 

But it will tax the hell out of the portable battery.
Any real dehumidifier will draw WAY too much power for that to work.

 

If you blow the humid air OUT, you must have an opening to draw fresh air IN.
Maybe the vent ducts would do that; don't know.

Search for a cheap "solar powered" window mounted car vent that runs on 12 V.
That should have a low enough draw that it would run for a long time on a portable battery.

 

Best RV Dehumidifier Reviews 2019

Some work on rechargeable batteries

 

The car has vents in the rear - hidden behind the plastic covers and behind the bumper; if you use hobbit’s circuit in the link above, it will keep air flowing constantly from the front to the back.

 

For what reason would someone avoid running the A/C?

 

The built-in A/C will convert the humidity to condensed water, and vent the water out a drain tube through the floor.

 

Did I miss something? What would be the problem with water draining onto the ground?

 

Apparently you did.
I didn't see him say, imply or hint at that being a problem.

 

Perhaps I read too much into someone posting immediately after "For what reason would someone avoid running the A/C?" with "The built-in A/C will... vent the water out a drain tube through the floor"

 

the thread got messed up after you post #12. chap wasn't replying to you, he was letting the o/p know what a/c would do.
o/p didn't say he didn't want to run a/c, he said most nights, he wasn't running a/c.

 

Ok.

I'm still wondering what is the purpose of building a Rube Goldberg device to avoid turning on the AC, but I'm just a dumb woman, so what can be expected?

 

it's probably too cool to run the a/c

 

I'm pretty square and I run the A/C routinely