4x4 / Off-Road TechThis section contains all discussion related to taking the FJ Cruiser in Off-Road situations, 4x4 applications and any armor modifications.
Wire the batteries in series will double the voltage, just like batteries in a flashlight. But wire the battery in parrallel and you keep the voltage the same and double the amperage capacity of the battery system. This would be similar to when you jump start a car.
What you would want to do is tie the negative to the negative, positive to the positive. Gains you lots of added capacity however there would be no back up like in the other systems. You will be draining both batteries at the same time, but it is the simpliest wiring and no solenoid is required.
Wire the batteries in series will double the voltage, just like batteries in a flashlight. But wire the battery in parrallel and you keep the voltage the same and double the amperage capacity of the battery system. This would be similar to when you jump start a car.
What you would want to do is tie the negative to the negative, positive to the positive. Gains you lots of added capacity however there would be no back up like in the other systems. You will be draining both batteries at the same time, but it is the simpliest wiring and no solenoid is required.
I stand corrected, I did not specify in series vs parrallel. Thanks for the correction.
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Wire the batteries in series will double the voltage, just like batteries in a flashlight. But wire the battery in parrallel and you keep the voltage the same and double the amperage capacity of the battery system. This would be similar to when you jump start a car.
What you would want to do is tie the negative to the negative, positive to the positive. Gains you lots of added capacity however there would be no back up like in the other systems. You will be draining both batteries at the same time, but it is the simpliest wiring and no solenoid is required.
Quote:
FJVP previously said:
I stand corrected, I did not specify in series vs parrallel. Thanks for the correction.
Thanks DVAN and FJVPs for answering my question.
I understand that for the purpose of powering up all the electrical gadgets in my truck; I can use this method. For me, back up battery is not a big deal; the most important is I don’t want my truck performance to be affected by loading the electrical system. Also it is cheaper, easier and faster.
If you are constantly drawing more then your alternator is putting out, it won't matter how many batteries you put in, but more then likely your load is intemittent and the alternator would keep up
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