Quote:
dukeiiixxx previously said:
Thanks SBECHTOLD for this great write-up
I’ve one silly question,
Is it possible to add another battery and connect it to the OEM battery without adding any other devices or fuse blocks, i.e. replacing the original fuses by higher Am fuses would not help here? . 
Thanks again. |
In theory, you could add as many batteries in parallel, as you'd like - you'd still have 12v, and a tremendous amount of reserve capacity and cranking amps available. In reality, however, the larger the load on the alternator, the more likely you are to damage the alternator. Most alternators are designed to handle a certain lad, and if you exceed that load consistantly, you will damage the alternator (or its control circuits on newer vehicles) and no batteries will charge. That is the purpose behind higher-output alternators - to allow more charging capability, in addition to running more accessories.
A dual battery system, if the batteries are reasonably close in style / size, should be no problem for most alternators. But if you ad a third, fourth, or even more batteries in parallel for the alternator to charge all the time, you are likely to experience premature charging system meltdown...
(And the rating of the fuses has nothing to do with this - fuses are to protect circuits from overload coming into them, not restrict current going out of them...)
