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Old 09-17-2014, 09:33 AM   #61
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Re: Searching for the nebuchadnezzar

Hi again all,

So I am sitting here asking myself a question: If I have an electrical system consisting of shore power, genset and house batteries and inverter (solar panels for charging are a possibility) do I need 12v available for anything? Will 2-way/ 3-way appliances run in gas mode without 12v?

Thanks again guys
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Old 09-17-2014, 09:53 AM   #62
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Re: Searching for the nebuchadnezzar

If you have a 3 way fridge and no power to it, with only gas on it, it will run on gas.

As far as 12 v power is concerned, remember, led lighting is mostly 12v. You can buy some with converters you plug into a wall but lose energy efficiency that way. Most of your water pumps are designed to run on 12v too. Not to mention ceiling mounted exhaust fans. (If you build a battery bank inside, you may want to consider 12v computer fans for ventilation of the space.

viewtopic.php?f=9&t=12834&start=570 read here.....



http://www.ehow.com/how-does_5631807_co ... work_.html

a little read on how gas works on a fridge.


-Doc
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Old 09-17-2014, 09:55 AM   #63
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Re: Searching for the nebuchadnezzar

Not sure about the 2-way appliances but I think they do need electricity to operate in propane mode, probably 12VDC. Your solar panels themselves will deliver either 12VDC or 24VDC depending on the panels and how they're set up. When using your batteries for power, DC appliances and lighting will be more efficient because you won't have conversion losses, assuming your DC wiring is of sufficient gauge to minimize voltage drop.

If you haven't already done so, read Handy Bob's blog thoroughly and re-read until you have a good understanding of the subject matter.

http://handybobsolar.wordpress.com/
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Old 09-17-2014, 09:56 AM   #64
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Re: Searching for the nebuchadnezzar

Thank you Doc
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Old 09-17-2014, 10:14 AM   #65
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Re: Searching for the nebuchadnezzar

Handy Bob's article is great! there is one thing that keeps confusing me though. If using an converter that gets installed in a sub panel in front of shore power/ generator. So for connecting 12v appliances are there two 12v distribution panels one for the converter and one that would run directly from the batteries?
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Old 09-17-2014, 06:52 PM   #66
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Re: Searching for the nebuchadnezzar

No. Shore power to converter which charges batteries and runs 12v items. I am sure there is some sort of transfer switch from converter to battery when shore power is disconnected.

Only time you'd need two boxes is if you ran 110v AND 12v throughout.

I am going to try to sketch out my plan and post it here for you. Brb........
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Old 09-17-2014, 08:53 PM   #67
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Re: Searching for the nebuchadnezzar

I tried to design one but I am awful with photoshop and paint, so I borrowed one,

very simple diagram,



as you can see, only one breaker box, but to hook into the battery some people use bus bars with inline fuses. I prefer the route that comes on most cars and trucks, one power line to a fuse box, and ground everything else to the body of the bus via the negative post of the battery. Like so,



Am I as clear as Alabama clay mud?

-Doc
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Old 09-17-2014, 09:53 PM   #68
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Re: Searching for the nebuchadnezzar

Thank you Doc
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Old 09-17-2014, 10:57 PM   #69
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Re: Searching for the nebuchadnezzar

You got it!
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Old 09-18-2014, 10:05 AM   #70
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Re: Searching for the nebuchadnezzar

In addition to Handy Bob's blog, I've found this book very helpful:

http://www.amazon.com/Electrical-System ... al+systems

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