12v or 220v

[Sunking]

Well let's put it this way:

Direct Current flowing through dissimilar metals = Corrosion. Sounds like a sinking ship to me. Add water and you accelerate the process. Add salt water to the equation and you have a rust bucket in no time at all....

Need to know more?

You should never use a frame or ground reference as a current carrying conductor regardless if AC or DC for low voltage systems under say 1000 volts.

[Brainless]

I am in the planning stages of building a house constructed of 2 40ft sea containers. As these are completely made of corton steel i was wondering if electrical wiring can be 12v using the metal construction as a ground, just as in a car. Using copper or alluminium hollow tubes for distributing the electricity.

As everything is still in the planning stage i could plan to buy as much appliances that directly uses 12v DC instead of converting it to 220v first. Obviously some appliances will be very hard to get and for those i would like to have a small converter with enough power for that particular appliance.

Cooking will be done with butane/propane. i guess a microwave will be a challenge using a whopping 60A at 12v.

An airconditioning using ice water and heat exchanger will be used at night to make sleeping comfortable. Where i live the climate is tropical.

It will be completely of grid, but before making the necessary calculations on how much solar (and wind) power i will be needing depends on if this wiring for 12v is doable.