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Old 12-22-2010, 01:55 PM   #1
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why can't I use an inverter ?

all I want to do really is charge up the one 12 volt battery in my trailer,and as luck would have it my power cord in the rear storage area is 90 foot long so it would easily reach the inverter with no other cords,what do you think?? bad idea ?
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Old 12-22-2010, 01:57 PM   #2
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What inverter?
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Old 12-22-2010, 02:05 PM   #3
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Sorry ,one installed in the tow vehicle Chevy van
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Old 12-22-2010, 02:08 PM   #4
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Inverter converts DC to AC. You want a battery charger-turns AC to DC.
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Old 12-22-2010, 02:10 PM   #5
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what I am asking about is this, how can I use my nice long trailer power cord,and my vans motor to charge up trailer battery ? seems to me ,if it is plugged in the trailer converter will do with the electricity as it needs, Yes ?
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Old 12-22-2010, 02:30 PM   #6
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Correct! This would work but would not be very efficent. You would be better to let the Van run and charge the trailer through the 7 pin cord that you hook up for travel.
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Old 12-22-2010, 03:09 PM   #7
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If you have cables that would reach, just using jumper cables would be faster and cheaper. Through the 7 pin would not be efficient at all. Either way you are going to burn a lot of gas to do this.
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Old 12-22-2010, 03:41 PM   #8
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If you have cables that would reach, just using jumper cables would be faster and cheaper. Through the 7 pin would not be efficient at all. Either way you are going to burn a lot of gas to do this.

Boondocker,

How many amp would you expect with cables vs. the 7 pin? I have registered 40 amps with mine however I have never measured a set of cables. I would think that the end clamps would be very lossful.

I do agree that this is a very expensive generator.

Chris
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Old 12-22-2010, 03:59 PM   #9
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Boondocker,

How many amp would you expect with cables vs. the 7 pin? I have registered 40 amps with mine however I have never measured a set of cables. I would think that the end clamps would be very lossful.

I do agree that this is a very expensive generator.

Chris
Im not an electrician. Having said that, I dont see how you could possibly get 40 amp through the 7 pin. I would guess the number to be in the 2 amp range...... Not to be a smarta**, but are you sure the decimal point is in the right place? In any case, I would expect the large diameter of the cables and properly connected clamps to transfer a far larger current than the umbilical. Thats just me though, maybe the electrical gurus will weigh in.
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Old 12-22-2010, 04:09 PM   #10
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If you are going to run the Van to charge the battery. Why not just plug it in to the Umbilical Cord (for your trailer lights)?
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Old 12-22-2010, 04:10 PM   #11
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Chris, to get 40 amps down 15' of wire requires 6 gauge wire. Do you have a custom wired 7-way?

I vote for hooking up a cheap 55 amp harbor freight battery charger if you have 110v power available. They're about $39.
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Old 12-22-2010, 04:11 PM   #12
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I am sure that this is correct. I used a 1000amp probe that is certified that I use for work. I have to send it back to fluke every 3 years.

I have 8 awg wire for charge lines so this may affect my results.

No big deal on the smarta$$ I am one at work all day and sometimes at night too. Lol
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Old 12-22-2010, 04:14 PM   #13
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You would lose a lot of juice converting the dc to ac and back again just to charge the battery, not to mention the 90' of cord it has to carry over.
Alternator to inverter to AS power supply to battery=

It may work but it would probably take a long time to charge, and lots of fuel.
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Old 12-22-2010, 04:19 PM   #14
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Lots of fuel considering most alternators won't put out too many spare amps at idle, so ya got to get the RPM's up, by driving. OR you have the ambulance prep package on a Ford with a high idle switch! Either way, cheap HF battery charger is hard to beat.
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