You don't.
yes
You can if you plan to convert all of your electrical system, starter, lights, gauges and accessories to 24 also. And change your battery to 2 batteries connected in series. Why would you want to??
if the vehicle it is in is a truck i would say 12volt if it is in a bus it is 24volt this is only due to the starter and the direction the starter will turn
Chargers don't care is the battery is used on a boat, a car, or whatever. What is important is that you match the voltage of the battery and the charger. Don't use a 12volt charger on a 24volt battery, etc.
As far as I know you can only do it if your lorry has two 12volt batteries connected in series, ie with the positive of one battery connected to the negative of the other. If so, then you connect the car jump leads to ONE of the lorry batteries in the normal way (car positive to lorry battery positive, car negative to lorry battery negative). Try to start the lorry like this, with the car engine running at a fast idle, with all electrics on the car turned off. If this doesnt work, try again with the jump leads connected to the other lorry battery ONLY. If this doesnt work, then both lorry batteries are too flat and you'll have to jump off a 24volt lorry / charge or replace the batteries. Jumping off a 12volt car usually only works if you have one lorry battery which is ok-ish, and you use the jump leads to "help" the weak one with the car. Good luck from Norn Irn!
I don't believe this can be done. Someone else may have a better answer but for one charger you need the batteries in series and for the other you need them in parallel. Even if that weren't the case, having 2 voltage supplies connected together will cause problems, possibly a fire. Each charger will supply voltage to the other and they are not made to handle that.
The same way as jump starting a car, only beware that the lorry may have 24volt electrics. Use jump leads, connecting + to + and - to -. Red to red and black to black. Use a donor lorry with the engine running, or a donor battery, using two 12v batteries connected in series if 24volt system.
24volt dc
This is a very simple equation, as the motor is 26ah and the batteries are also 26ah, then they should power the motor to it's maximum effort for 2 hours. However this will all depend on the amount of effort the motor is required to produce. 1, Example; If it is to ensure a flywheel is continuously rotating then it may last for upto and way above 12 hours. This is due to the only real effort on the motor, is getting the flywheel upto speed. (depending on how the motor and batteries are wired up, the motor may start chraging the batteries if the motor slows down REGENERATIVE CHARGING) 2, Example; If it i driving a scooter or childs car with a person in or on it then the motor will have to work harder so the batteries will last 2 hours or less depending on the weight of the passenger. Hope this helps. ;-) Jon jonny86g@yahoo.co.uk
Yes, you will need to install a second 12V battery in series with your existing 12V battery to supply 24V to the winch. However, to keep them charged, they have to be charged in parallel. You'll need a schematic to do this correctly and not damage the winch or batteries. I recommend you contact the winch manufacturer for a schematic. It might be best to purchase two new 12V batteries to operate the winch and not tie into your Land Rovers battery. I would purchase "deep cycle" marine batteries such as are used in boats and RVs. These will give you the best performance They are available anywhere batteries are sold.
Chevrolet and GMC trucks with diesel motors have a lot of electrical draw; glowplugs and such; that the standard battery is insufficient. Rather than develop a speciality monster battery, GM chose to install two batteries in parallel - doubling the capacity. They did the same in the diesel Oldsmobiles. People with gas motor trucks who want extra reserve capacity truck, like for a winch, killer stereo or just bragging rights; will install the extra battery tray, battery, cables, etc. I can see that emergency and/or service vehicles might have a second battery option. I personally worked on a GMC Jimmy that was a U.S.Army truck that had been surplused to my state's Department of Natural Resources. It have a 24 volt charging/starting system - as do all Military equipment I have seen - and it had two batteries in series to produce the 24volt storage.