im trying to go from the batteries 24v to the 12 volt dc distribution about 8 feet. Right now there is 12v batteries with i think is 6awg, car battery size wire, going from the batts to the dc panel. I found a dc to dc converter that is rated to do 24V Step Down to DC 12V 30A 360W. I have replaced all the light with LEDs from the crap incandescent bulbs.
Rv hook up
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John Frum
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Got it, 16 feet round trip.
Does it look like this?
If yes, probably wise to beef up the rating or get a better converter.
Is that the amp rating on the converter in the ac/dc distribution center?
I think you are asking is you can use the existing 6 awg wire.
Yes that is fine to use on both the input and output side.
Assuming the wire insulation is rated for 105C you can use a 100 amp fuse and close to the positive system busbar as possible.
No fuse is required on the output side.
John Frum
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We have not talked about the topology of the rest of the system.
I wasn't thinking about the fact that the unit comes with wires instead of screw terminals.
Honestly those units are pretty crappy and I don't recommend them.
But if you want to use one I suggest you connect it to the new system with 10 awg wire and wago 221-612 lever nuts.
Use 10 awg on both sides.
Transitioning down from 6 awg to 12 awg will be a pain.
Hi,
I know this is an older post, but if the converter was wired into a 15 amp breaker, is putting a 15 amp fuse inside the transfer switch (before the wires for the converter are connected) ok? What type of fuse (120V) should be used.
Thank you
John Frum
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As long as the converter uses 14 awg wire or thicker the upstream breaker will protect it.
Sorry..Maybe I'm a bit confused...and to make sure I understand.
I'm removing the converter postive and negative wire (which are 14AWG) from the WFCO power center (that goes to the breaker) and wiring it directly to the transfer switch. The breaker is no longer in line. Which up stream breaker. ?
tks
John Frum
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I understood from your post that there was 15 amp breaker upstream from the transfer switch.
What is the rating on the upstream breaker?
John Frum
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That breaker sees to be for a 12 volt relay.
Typically the ac wire into the transfer switch is 10 awg and the breaker at the pedestal is 30 amps.
Since you are tapping the input side of the transfer switch with 14 awg wire you need a 15 amp fuse to protect the 14 awg wire.
thank you...Appreciate the help to make sure I do it right. This type of fuse is the right kind...correct?
John Frum
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I don't trust them for stranded wire.
Even worse when one wire is solid core and the other is stranded.
RoadTurtle
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Kind of fun watching how fast you can deplete batteries running a converter from an inverter. Doesn't take long 
}.
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I would seriously look at more solar for the batteries. Std is 2x in watts as battery ah. For 600ah battery, you should be looking at 1200w solar..
Spending your money, you might want to consider Victron multiplus which does several things, including making up 120v shortage off of battery and will also charge batteries.
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I would seriously look at more solar for the batteries. Std is 2x in watts as battery ah. For 600ah battery, you should be looking at 1200w solar..
Spending your money, you might want to consider Victron multiplus which does several things, including making up 120v shortage off of battery and will also charge batteries.
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