From the many configurations I have found on the internet on how to wire a 12v battery bank, I am yet to find a way to most efficiently charge and drain my 10 12V-battery deep cycle battery bank. Just recently they were wired in series as shown in option 1. It seemed to work fine during the very sunny days of the spring of 2015, then I connected my wind turbine generator to the same charger leads and the batteries began to not last as long (charged). Before hooking up the wind turbine;I was surprised the bank supplied energy for long periods as I thought the battery being mostly charged and drained was the one connected to the inverter and controller terminals. Thinking this configuration was not optimal I switched to option 3 on the diagram shown. So, far the batteries have not held much charge, I will try option 1 again, and if not optimal then try option 2. Option two is believed to be a balanced draw and charge option.
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