Originally Posted by us71na
If both batteries are the same type and condition, electrically it doesn't make any difference for either charging or discharging. Both batteries see equal voltage and current and will provide equal voltage and current. There might be some advantage with batteries of differing capacity but connecting different capacity batteries in parallel is not a good idea.
Here are examples (comparison of different methods) to support the method of connecting the load to the Positive terminal of one battery and to the Negative terminal of the second battery in a parallel configuration. Since there are only two batteries the numbers will not be as great, but still will affect the charging/discharging of the battery bank.
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