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Old 12-22-2010, 04:24 PM   #15
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1966 24' Tradewind
Oak View , California
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In an emergency once I tried to put some juice in my battery, hooked it up to the truck, ran it forever, revved it and it did next to piddley nothing...
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Old 12-22-2010, 05:13 PM   #16
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The only fairly efficient way to charge your trailer battery using your tow vehicle is to:

1. Hook HD jumper cables (2 AWG min wire size) from your TV's battery terminals directly to the trailer battery's terminals...DON'T use cheapo jumper cables that have small gauge wires! Truckers use jumpers with at least 2 AWG size wire - not cheap, but have much less DC voltage loss...

2. This type of connection will insure the greatest charge rate using the TV's alternator...however, realize you're running your LARGE engine for a moderate charging rate, again not a very efficient way to do this - extra wear and tear on your TV, extra fuel required, etc., etc...

3. connecting the trailer's shore power cord into an inverter on your TV is not an efficient charging method, as you lose on both ends converting from DC/AC (inverter) then to AC/DC (converter), PLUS all the additional connections encounted through these components...

4. using the TV umbilical will work, but again you're going to lose efficiency due to the connectors, fuse panel connections, fuses, and the smaller size of wire used in those circuits...this type of charging is designed to charge your trailer battery as you're on the road over a long period of time, etc...

5. if you intend to do this kind of recharging of the trailer battery very often, you're better off saving up your $'s and purchasing a small generator, IE, Honda inverter type (quiet), or similar 'genny'...

Hope that helps...

Ray
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Old 12-22-2010, 06:00 PM   #17
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dang it! here I thought I could be sly and use that long cord to my advantage,looks like a honda is in my future...
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Old 12-22-2010, 09:52 PM   #18
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That struck me as kinda funny too: how many here have 90' of AC cord connected to their TT??

I hear 90' I think tons of losses through that wire... Whether you are 90' away or not, every time you plug in you add that 90' to the distance the power has to go to your TT.

I'm gonna guess that there's ~30' on my TT.
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Old 12-23-2010, 06:36 AM   #19
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The P.O changed out the power supply cord to 90 foot long,now I think maybe I should shorten it up a bit...
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