if you've ever wonder how to set up 24 volts through a 12 volt winch motor or what are the benefits then have a watch of this video. It brings your winch to life. any more questions drop a comment.
I'll explain the difference. with the readings you got. They were both around the same current draw as it's most likely a limiting factor of the battery or the windings in the winch motor. So at 12v and 359A, your winch is getting 4308W of power, but when you switch to 24v, you are effective doubling the power (Watts =Amps x Volts) your winch can pull which is now 8424W. If your winch was to have the same power at 12V as it does at 24V, it would need to pull 781A at 12V which your cabling setup, battery and solenoids cannot sustain for more than a second or two. Those are very good batterys, have a CCA of about 820A, however that is only for a second or two (like draw from a starter motor). After supplying that initial rush of current, their output current drops significantly and is likely around that 350A-360A which would be why you see that number regardless of 12/24. Hope that makes sense.
Makes perfect sense mate. I got this reply also which was another explanation. Also like I said in the video, it’s hard to load the winch up the same because on 24 it just dragged the car on the grass haha! The motor spinning generates an internal voltage (back emf) the difference between the supply voltage and the back emf is dropped accross the motor resistance and current can be calculated using ohms law I=V÷R (note voltage here is the difference between supply and back emf) as the load is applied the torque increases which draws more current. At stall there is no back emf and the whole supply voltage is dropped accross the motor resistance. So say the motor resistance 0.05 ohm. At stall, 12÷0.05 = 240 amps. 24÷0.05=480 amps so at stall the 24v system can draw twice the 12v current. The similar current readings in the test comes from the fact that in the 12v test the motor was near stall with little back emf. The 24v test the motor was still spinning quite quickly producing around 12v of back emf at approx half stall speed. Giving you the same current draw result. The "double the voltage halve the current" addage comes from a fixed power usage, I.e. 100w load at 12v Will draw approx 8.3 amps, the same 100w load at 24v will draw 4.15 amps. I=P÷V
"booster box" "supercharger unit" are just marketing words, they just have your typical high amp solenoids. With some diodes, you can add a dc to dc charger and have ur secondary 12v battery charging while winching also. Great VOD
But if I don’t call them by their name then people won’t know what I’m talking about. I don’t think I’d go that direction with a dc to dc charger, they are expensive and only 30ish charging amps. Not worth it in my opinion. Cheers mate
Daniel Kistler that’s fair enough , I prefer having 30-35amps charging than zero while using but yeah understand. Being I already have a Dc to dc charger for when cars not running and for solar so it wasn’t an extra expense solely for that use. Thought you might already have one on board. Cheers
Yeah fair enough. It still charges one battery just not both. My race car hasn’t had a working alternator for the winch for over 2 years haha. The amps drawn from the winch is massive compared to what a charge unit can put in, so when winching I believe it does next to nothing. No dc to dc charger in my car. Cheers
Daniel Kistler lol. For sure hundreds of amps. With the diode setup I use the alternator charges main like normal and the dc to dc chargers the 2nd even while using in 24v winch mode. It’s a nice little mod if you ever get dc to dc setup. I did it cause I didn’t want to change to 24v alt and to give my 2nd a bit of help while winching. And cause I can. Lol look forward to ur next vod
Jeep-Australia that would work well. I just flick it back to 12 after using it haha. Thanks mate, will have to wait an extra week for a video, I’ve got nothing this week haha! Cheers
It was very educational mate,i would go for an electric winch touring wise but comp style and monster pull i'd go for a pto winch or god winch like we do here in borneo,click borneo safari on youtube if u wanna see how fast the pto can pull
Hey mate, in the market for a new winch and leaning more and more to a highmount, heard any negatives about the red winches cobra2? Tossing between a 8274 or spending the extra for a newy
Hey mate, Havnt heard any bad things about the cobra but I only seen one person running one so don’t have a great deal of experience with them. No doubt it will be awesome quality like all the red winch products. I would have liked to try one!
My landcruiser is 24v. I'm running a 8274 with a Warn from a 24v XD9000i motor. I'm thinking change to a bow motor ... Should I put a 12 or a 24v motor???
amps is what makes the magnetic field, thats the torque, the pull. volts is how fast you pull it. my 2c, use a snatch block on 24v and it pulls with half the amps, a lot less stress on the rope motor and winch box ,,, but still goes as fast if not faster than a straight pull on 24 and over twice as fast as a straight pull on 12v
24v with a snatch block would half the line speed. Would then be to slow and annoying to set up haha. Even now 24v is slow after using my other winch lol.
Daniel Kistler It doesn’t make sense. But try it one day, just like you did here, under load. I have to agree that adding the snatch block does add a few seconds extra time and more importantly it reduces how far you can pull and means you have to set twice to pull the same distance. But I find it’s worth it, one shorter pull is normally enough to get out and the batteries don’t pull half the current, the motor doesn’t heat up and the strain on the equipment just isn’t there. Try it one day, it’s worth the half hour to do the test.
I’ve personally tried this before, yes the snatch block reduces the strain on everything, and increases the pulling power, if it didn’t do either of them you wouldn’t use it. But it does roughly halve the line speed and like I said that is frustrating. We do this modification to gain and faster winch and more pulling power so we aren’t sitting around all day, having a fast winch makes it fun. I’ve been running 24v on winches for over 5 years now and have yet to break a winch.
Daniel Kistler Perhaps my poor old winch is a lot smaller than yours. Mine Boggs down under load severely and mine goes slightly quicker as double by not bogging down near as much.
It may be the case. That sounds like a case where It would work better. In my case I’ve never bogged the winch down enough on 24v to actually justify getting a snatch block out haha
Hey mate, really considering doing this for my rig, just curious as to your thoughts regarding my potential set up. I have 2 D34 Optimas (675cca), any ideas if they’d have enough juice to keep a Bow2 or possibly Bow2+ running happy? Would be running the motor of the main battery too, not a dedicated second system. Cheers 👍
It will work but personally I’d be using bigger batteries mate. If you don’t want to put bigger batteries in then maybe consider putting a 3rd battery in and set it up like my car. It will definitely work with them 2 batteries just might not last that long if you do a lot of winching and then your also draining your start battery too
@@DanielKistler Cheers for that. I’ve had all sorts of people tell me different things, but good to hear from someone who actually runs it 👍 might have to give it a shot with what I’ve got and if that doesn’t do it, look at bigger batteries and pop them in the rear. Cheers
It still charges 1 of the batteries when it’s on 24v, but yeah no dramas. The race car I have hasn’t had an alternator for 2 years 😂 just charge the batteries the night before. But that has 4 batteries for the winch.
Great video mate, quick question have you used 70mm2 for the power and earth from the main battery to the box as well as the auxiliaries? And are the auxiliary batteries wired in a parallel series or circuit? Thanks in advance
Thanks mate, yeah I did use 70mm to link between batteries are switch box. Both batteries in the circuit get wired to the switch box. There’s labels for where they need to go. Cheers
@@DanielKistler - Well, I would ask you if you run 120V tools on 240V, but then I saw you were in Australia, so I figure you might not even have that option...
