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Old 01-23-2016, 10:55 AM   #1
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DC power removal

I have a 1978 sovereign 31' that I'm gutting and rebuilding with the goal to live in. I'm leaning towards ripping all the DC power out. It seems like it would be easier to rewire AC power and better options on lights. Anyone have any experience doing this? Good idea? Bad idea?

Thanks in advance!
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Old 01-23-2016, 11:24 AM   #2
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BAD IDEA!

If you intend to use any RV style components like water heater, fridge, LED lighting, furnace, roof A/C with electronic T/stat you will need 12 VDC For control voltage and power for 12 VDC motors.

If you intend to use this like a tiny house and never tow it again, then residential wiring will work.

I would strongly suggest studying the situation thoroughly before making an all or nothing decision like this.


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Old 01-23-2016, 12:37 PM   #3
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Bad idea.
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Old 01-23-2016, 12:47 PM   #4
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Hi from AZ. . . what he said. . . regards, Craig
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Old 01-23-2016, 03:47 PM   #5
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I ditched all of my 12V save the porch lights and the water pump, I run everything via an inverter.

All of my fixtures and appliances are "residential" units.

It works well for me.




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Old 01-23-2016, 03:53 PM   #6
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Frankly, it is my opinion that Inverters have made a lot of RV technology obsolete.

But that said, I didn't ask for advise here before building my trailer my way, I just did it... and then told what I did..


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Old 01-23-2016, 04:00 PM   #7
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If you do "rip out" the 12 volt system AND you plan on towing, make sure to provide an adequate battery for the trailer brakes. However, if you never plan to tow, and you want the Airstream to basically be a "little house" that stays put, then going all AC power could work but you will need to have all residential appliances and lights.
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Old 01-23-2016, 04:31 PM   #8
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Bad Idea!
if you are going to tow, you might as well keep what is in place.
Inverters are very inefficient especially the "cheap ones" and will suck the life out of a battery in no time.
LED's work on 12 V, not 110. They must be converted back to 12 V to work.
Makes no sense at all, if you are using your trailer to travel.

-Dennis
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Old 01-23-2016, 04:32 PM   #9
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Personally, bad idea. It kills the resale value and limits use.
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Old 01-23-2016, 04:49 PM   #10
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I'm living in mine, and actually prefer the 12v everywhere (I will be towing it as well). Most LED lights are 12v, so you'll have to convert 120 to 12v either with one big converter, or with many individual ones, if you switch to LEDs... if the power goes out, you have a battery and converter to run the lights, can charge off your tow vehicle (or car with jumper cables...)

I've actually been wondering why houses don't run on 12v. High voltage AC is better for transmission lines, low voltage DC is better for equipment. Computers, fans, even the range-hood I just installed at a friend's place have a converter from 120AC to low-voltage DC.
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Old 01-23-2016, 05:09 PM   #11
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DC power removal

Since my inverter runs off of batteries charged by the charger, or the tow vehicle, it is really about the same deal.

I have my trailer wired so that the entire electrical system will run off the land line, the inverter, or the generator at the flip of a of couple switches. No "dedicated outlets" or other limitations.

I simply took a different approach and avoided the complexity of a dual electrical system.


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Old 01-23-2016, 06:14 PM   #12
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If you do tow you need a battery for your breakaway switch to be legal on the road. Trailer brakes, I believe, work off the tv battery.
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Old 01-23-2016, 07:05 PM   #13
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Quote:
Originally Posted by shupack View Post
I've actually been wondering why houses don't run on 12v. High voltage AC is better for transmission lines, low voltage DC is better for equipment. Computers, fans, even the range-hood I just installed at a friend's place have a converter from 120AC to low-voltage DC.

it would be difficult to run heavy loads of of 12V DC. Stoves, space heaters, hair driers, air conditioning, air compressors, clothes driers, etc.

The wiring for these loads would need to range from very large to HUGE.

The loss across even typical household runs would be very noticeable. AC is much better than DC at even relatively short runs.


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Old 01-23-2016, 07:24 PM   #14
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Quote:
Originally Posted by shupack View Post
I'm living in mine, and actually prefer the 12v everywhere (I will be towing it as well). Most LED lights are 12v, so you'll have to convert 120 to 12v either with one big converter, or with many individual ones, if you switch to LEDs... if the power goes out, you have a battery and converter to run the lights, can charge off your tow vehicle (or car with jumper cables...)

I've actually been wondering why houses don't run on 12v. High voltage AC is better for transmission lines, low voltage DC is better for equipment. Computers, fans, even the range-hood I just installed at a friend's place have a converter from 120AC to low-voltage DC.
Interesting that you mentioned houses. Here are a couple of shots of a 'tiny house' that is solar powered. I did all of the wiring for the owner and based most of the loads for 12VDC operation with 120VAC available from the inverter. Specifications include a 400 amp/hour lithium battery, 480 watt manually adjustable ground-based solar array and 2000 watt Magnum sine wave inverter/charger. If the battery gets too low or sun isn't providing sufficient charging radiance, they simply plug into a back-up generator (in this case, a Yamaha 2400 with LP conversion) to replenish the lithium battery.

All lights are 12VDC LED, composting toilet, marine wood stove, RV LP stove with convection microwave, Precision Temp RV-550 tankless water heater, Isotherm 130 liter marine fridge with DC Danfoss compressor. All systems are readily transferrable to RV use. It even has wheels so it can be relocated if desired.
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