Wiring in parallel sums the amp-hours produced by each battery while maintaining voltage level the same. So, if we take 2 identical 12 voltage, 110 amp-hour batteries and wire them in parallel, we end up with a 12 volt system that produces 220 amp-hours of capacity and extended running time. 12 Volt System (2 Batteries). DC-DC,Mains & Solar Wiring Diagram DC-DC, Mains & Solar - Basic wiring diagram showing how to connect 3 charging sources from DC-DC, Solar and Mains to 1 battery.
![[DIAGRAM] 12 Volt Charging System Diagram](http://nevonprojects.com/wp-content/uploads/2017/08/12-Volt-Battery-Charging-System-Block.png "[DIAGRAM] 12 Volt Charging System Diagram")
![[DIAGRAM] 2 12 Volt Batteries In Series Diagram](http://www.batteriesinaflash.com/images/floodedleadacid/WiringPics/Series_And_Parellel.jpg "[DIAGRAM] 2 12 Volt Batteries In Series Diagram")
![[DIAGRAM] 2 12 Volt Batteries In Series Diagram](http://1.bp.blogspot.com/-2pvZzOUf0Rk/UJBK-MUlTuI/AAAAAAAABhM/fDXVNzPI2rI/s1600/battery+series+wiring+diagram.jpg "[DIAGRAM] 2 12 Volt Batteries In Series Diagram")
The Current Controlled 12V Battery Charger Circuit Using IC LM317 presented here shows how the IC LM317 can be configured using just a couple resistors and an ordinary transformer bridge power supply for charging a 12 volt battery with utmost accuracy.. Learn how to wire batteries in series, parallel, and series-parallel with our step-by-step tutorial. Increase your battery voltage and amp hour capacity.