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Old 01-23-2016, 07:42 PM   #15
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Originally Posted by avionstream View Post
Trailer brakes, I believe, work off the tv battery.
Sorry, I believe that this is incorrect. Trailer brakes work off the trailer battery. The trailer battery can get a small amount of charge from the tow vehicle when it is hooked up (typically 5 to 7 AH.) And while the tow vehicle actuates the trailer brakes via the seven-pin connector, the power for the trailer brakes comes from the trailer's battery. You will notice that many other types of trailers (i.e., boat & utility) that require trailer brakes will have a small on-board battery for the brakes.
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Old 01-23-2016, 08:32 PM   #16
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Sorry, I believe that this is incorrect. Trailer brakes work off the trailer battery. The trailer battery can get a small amount of charge from the tow vehicle when it is hooked up (typically 5 to 7 AH.) And while the tow vehicle actuates the trailer brakes via the seven-pin connector, the power for the trailer brakes comes from the trailer's battery. You will notice that many other types of trailers (i.e., boat & utility) that require trailer brakes will have a small on-board battery for the brakes.
Nope, the trailer brakes work from the tow vehicle directly. The only time they take power from the trailer battery is in an emergency situation where the break away switch is activated. But 12 volt power is required for that if it happens.
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Old 01-23-2016, 08:48 PM   #17
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To be legal, a break away power source on the trailer is a requirement, but small battery kits for this purpose are available for trailers that do not have on board batteries.


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Old 01-24-2016, 07:21 AM   #18
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You have to love the variety of "expert" opinions here.
It is no wonder that new members get frustrated with the attitudes and in fighting.
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Old 01-24-2016, 08:51 AM   #19
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But on the subject of the electric brakes and break away device, there is only one correct answer.

Opinions may be diverse, but the correct answer is quite narrow.

However, a review of the answers on this subject, I think everyone is pretty much on the same page, they just said it different.

On the original topic though, I am pretty much alone...


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Old 01-24-2016, 09:43 AM   #20
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Thanks for all your input! Sounds like I should keep the dc power. So do the power outlets run AC separately than the rest of the system? Or is it all tied together?

Any good links to how RV dc works/wired?

Thanks
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Old 01-24-2016, 10:11 AM   #21
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Originally Posted by AnnArborBob View Post
Sorry, I believe that this is incorrect. Trailer brakes work off the trailer battery. The trailer battery can get a small amount of charge from the tow vehicle when it is hooked up (typically 5 to 7 AH.) And while the tow vehicle actuates the trailer brakes via the seven-pin connector, the power for the trailer brakes comes from the trailer's battery. You will notice that many other types of trailers (i.e., boat & utility) that require trailer brakes will have a small on-board battery for the brakes.
I stand by my comment. The small battery on boattrailers is for the breakaway switch in order to be legal. Good camping
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Old 01-24-2016, 11:29 AM   #22
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I stand by my comment. The small battery on boattrailers is for the breakaway switch in order to be legal. Good camping
That depends on the trailer. Surge brakes do not require a battery. Electric and electric over hydraulic should have a battery.

Back to the original question, I think you've tumbled to the answer that keeping the 12 volt system is the wise way to go. You asked about guides for RV wiring. Google it, there's a lot of info out there, both AC and DC.
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Old 01-24-2016, 01:23 PM   #23
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Correct but the poster commented on small batteries in other types of trailers, not those with surge brakes.
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Old 01-25-2016, 12:26 PM   #24
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Would it be a bad idea to have everything 120v with a converter for battery backup?
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Old 01-25-2016, 01:37 PM   #25
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DC power removal

You would need an INVERTER for that purpose, not a converter. It would have to be sized to be capable of operating all of your 120VAC loads, along with an appropriately sized battery bank.

If you then have a battery bank that you only use for emergency, you will also need a charging system for same. An inverter/charger will do both nicely and units like those from Magnum Energy will also pass thru all of your shore power to your 120 VAC loads, along with keeping your batteries ready if/when you need them.


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Old 01-25-2016, 04:53 PM   #26
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Picture one is my trailer on shore power, picture two is my trailer on inverter.....

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(Excuse my mess please)


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