Posted by BarnyardEngineering on October 28, 2020 at 07:21:50 from (173.186.244.244):
In Reply to: 2140 starting posted by rusty6 on October 27, 2020 at 20:53:54:
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What is your reasoning?
If you replace two batteries with a single battery of equivalent or greater CCA capacity, you eliminate half the connections, can use shorter battery cables, eliminate the problem of one battery going bad killing both (in a parallel configuration). Fewer points of failure, less complexity.
A common misunderstanding is how things "add together" in a dual battery configuration.
1. If you are using two 6V batteries to make 12V, that is a series configuration. Only VOLTAGE adds up. Two 850CCA 6V batteries in series gives you 850CCA at 12V.
2. If you are using two 12V batteries to make 12V, that is a parallel configuration. Only CCA adds up. Two 450CCA 12V batteries in parallel gives you 900CCA at 12V.
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