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batteries - Charge at 24v and discharge at 12v for battery system - Electrical Engineering Stack Exchange
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Charging 12V batteries in series-parallel using a 24V charger - Electrical Engineering Stack Exchange
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Charging 24V Battery with 12V Alternator and Isolator - Motor Vehicle Maintenance & Repair Stack Exchange
![how to connect batteries in series and parallel to get the right system voltage and amperage capacity. how to connect batteries in series and parallel to get the right system voltage and amperage capacity.](http://www.solarray.com/Images/ImagesTGuides/drawings/BATTER~4.gif)