New off road motor

[jims-terrano]

Well let me know and if I can get leave I'll come with ya.

Back on topic

Looks like which ever system you go for it'll bring it's own problems won't it. A heck of a lot of amps 90!!!!! Them cables will make great heating elements I'll bet.

Jim

 

[briggie]

Well let me know and if I can get leave I'll come with ya.

Back on topic

Looks like which ever system you go for it'll bring it's own problems won't it. A heck of a lot of amps 90!!!!! Them cables will make great heating elements I'll bet.

Jim

p ( measured in watts ) = current ( measured in amps ) multiplied by voltage ( measured in volts ......... oh memories jim lol

 

[solarman216]

Well let me know and if I can get leave I'll come with ya.

Back on topic

Looks like which ever system you go for it'll bring it's own problems won't it. A heck of a lot of amps 90!!!!! Them cables will make great heating elements I'll bet.

Jim

my winch motor is rated 4.5 Kw so using ohms law (which I forgot) but got the number written down = around 375 amps at 12 volts, but the cables are thicker than starter cables so no problem there, but you can see why it is best to have a completely separate system for the winch, incidentally my fans on the back door pull 35 amps on high speed and 8 on low, Rick

 

[melissachels]

no what you will do is still have 12 volts, to get 24 you have to wire the batteries in series that it pos to neg then on the end two pos and neg you have 24 volts but you cannot charge from 12 volt like this, so you need a separate 24 volt alternator, Rick

that makes more sense!

but would this not work?

 

[solarman216]

that makes more sense!

but would this not work? View attachment 2893

sorry no the winch is still only connected to 12 volts, there is no possible way round it, you have to get a 24 volt alternator, Rick

 

[solarman216]

anyway , back to the original problem ...... even if you did manage to achieve 24 volts , and succesfully managed to charge them , you would still have to isolate your 24 volt system from the rest of your trucks electrics.

a lot easier to just swap your 24 volt winch for a 12volt one

not too bad a problem Pete neg remains common all round, 24 volt alternator directly connected to the 24 volt battery, exciter/warning bulb wired through a relay operated by trucks ignition, job done, Rick

 

[briggie]

there is a way , but its very complicated and messy , if you wire the batteries in series as i think you are trying to do in the pic , and then you split the output from the alt so that each battery gets 12v ,and providing it is a completely seperate and isolated circuit from the rest of your trucks electrics ie it doesnt use the same system for starting / charging the truck , then it may work , butit only comes into play when you switch it on and effectively connect both batteries in series providing your engine isnt running lol.

 

[solarman216]

But you can get problems, ran my set-up today fans worked great, alternators great, turned ignition off 2 nd alternator warning light lit (used the low fuel light on the dash) but engine did not stop, removed bulb engine stopped, then I noticed in the back of the cluster that the original battery warning light is in series with a resistor and diode in parallel, so will have to do the same with the other one, Rick

 

[briggie]

perhaps i didnt put that too well , the danger is you may have a 24 volt source connected to your 12v car system with all the dangers that will cause

 

[makeitfit]

Briggie when winching the last thing you want to do is voluntarily switch the engine off
Personally I'd just flog it as the cost of 2 good batteries and associated wiring and the extra weight etc sheesh, flog it

 

[briggie]

as rick mentioned , diodes / relays ......... its a lot easier to just get a 12v winch

 

[solarman216]

there is a way , but its very complicated and messy , if you wire the batteries in series as i think you are trying to do in the pic , and then you split the output from the alt so that each battery gets 12v ,and providing it is a completely seperate and isolated circuit from the rest of your trucks electrics ie it doesnt use the same system for starting / charging the truck , then it may work , butit only comes into play when you switch it on and effectively connect both batteries in series providing your engine isnt running lol.

problem with that Pete is you could only charge both batteries if the link between the two was cut during charging, sort of defeats the object, Rick

 

[briggie]

posted at the same time rick mate

 

[(RIP) PLANK]

Briggie when winching the last thing you want to do is voluntarily switch the engine off
Personally I'd just flog it as the cost of 2 good batteries and associated wiring and the extra weight etc sheesh, flog it

Spot on! I still believe this can be done, 24v halves current from 90 to 45, you can get a 40 amp split charging relay, and MAYBE a 40 amp 12 to 24 converter, but!! and it's a big but!!! This plus a pair of matching new batteries, plus the weight etc, plus it is all a little experimental :nenau

just bite the bullet, stick it on ebay and get a 12v winch with the cash :thumb2


OR!!!! get a generator and keep it in the boot just for running the winch, then you can have a 240V motor :lol

 

[briggie]

my point exactly pete lol , it can be done , but most of the work involved is pointless and messy , not something id like to do ...... as i said a lot easier to just swap ya 24 v winch for a 12v winch lol

 

[solarman216]

Spot on! I still believe this can be done, 24v halves current from 90 to 45, you can get a 40 amp split charging relay, and MAYBE a 40 amp 12 to 24 converter, but!! and it's a big but!!! This plus a pair of matching new batteries, plus the weight etc, plus it is all a little experimental :nenau

just bite the bullet, stick it on ebay and get a 12v winch with the cash :thumb2


OR!!!! get a generator and keep it in the boot just for running the winch, then you can have a 240V motor :lol

but you must have missed the post that gives the true operating amps when winching 375 or 4.5 Kw not 90 that was off load amps, but I like the idea of a genny in the back, good for when you fill the engine up with water like I did, Rick

 

[(RIP) PLANK]

but you must have missed the post that gives the true operating amps when winching 375 or 4.5 Kw not 90 that was off load amps, but I like the idea of a genny in the back, good for when you fill the engine up with water like I did, Rick

To be fair Rick, you give the impression that the only way to run a winch is with a second alternator (whether it is 12 or 24 volts), and the majority of winches out there are run with a split charge system and not a second alternator.
The main dilemma here is the conversion of charging volts from 12 to 24, and (as you say) after that the current is halved, and it would have two batteries to run from - thus having 4 times the running time of a similar 12 winch set up. Which would put your 10 mins to 40 mins. Ok it would take a long time to recharge at 10 amps, but as I said it may be possible to run as much as 40 amps. And besides, how often do you run the winch anyway and charging the winch battery from a split charge does seem the norm :nenau

So, as I said, I do believe this is possible!

The second alternator is, I am sure a fantastic idea, but not the only option!

The generator is, on the other hand, a ridiculous but interesting concept :naughty

 

[solarman216]

To be fair Rick, you give the impression that the only way to run a winch is with a second alternator (whether it is 12 or 24 volts), and the majority of winches out there are run with a split charge system and not a second alternator.
The main dilemma here is the conversion of charging volts from 12 to 24, and (as you say) after that the current is halved, and it would have two batteries to run from - thus having 4 times the running time of a similar 12 winch set up. Which would put your 10 mins to 40 mins. Ok it would take a long time to recharge at 10 amps, but as I said it may be possible to run as much as 40 amps. And besides, how often do you run the winch anyway and charging the winch battery from a split charge does seem the norm :nenau

So, as I said, I do believe this is possible!

The second alternator is, I am sure a fantastic idea, but not the only option!

The generator is, on the other hand, a ridiculous but interesting concept :naughty

I suppose at the end of the day it depends how much winching you do and in what circumstances, I have tried with two batteries and one alternator and a manual switch to connect the two batteries and on a long winch operation the engine almost died due to lack of voltage so had to stop for a while to recharge, my winch does not sit on the front of the motor and look pretty, it gets used, as for extending the running time from 10 mins to 40 that will depend entirely on the AH rating of the batteries if you simply add a match to to an existing that will run for ten mins then it will run for 20 mins, not 40, it is AH that matter not voltage, Rick

 

[(RIP) PLANK]

I suppose at the end of the day it depends how much winching you do and in what circumstances, I have tried with two batteries and one alternator and a manual switch to connect the two batteries and on a long winch operation the engine almost died due to lack of voltage so had to stop for a while to recharge, my winch does not sit on the front of the motor and look pretty, it gets used, as for extending the running time from 10 mins to 40 that will depend entirely on the AH rating of the batteries if you simply add a match to to an existing that will run for ten mins then it will run for 20 mins, not 40, it is AH that matter not voltage, Rick

This has been an interesting topic that, to be fair, should have had it's own thread as it has distracted from yours considerably:thumb2

 

[Fez_uk]

alot of winch challenge trucks will run 2 alternators. All depends on what you do with it.