To connect batteries in series, you need to connect the positive terminal of one battery to the negative terminal of the next battery. Repeat this process for all the batteries in the series. The positive terminal of the first battery and the negative terminal of the last battery will be the positive and negative terminals of the battery bank.
For example, these two 12-volt batteries are wired in series and now produce 24 volts, but they still have a total capacity of 35 AH. To connect batteries in a series, use a jumper wire to connect the first battery's negative terminal to the second battery's positive terminal.
By joining two Battery Banks (already linked in Series) and connecting them in Parallel, we increase the Battery Bank's voltage and Ampere-hours. Configuration: 4 x 12V 60Ah connected in Series then connected in Parallel = 24V 120Ah output. Batteries Used in Series and Parallel Example 2
For batteries connected together in series (+ to –), the terminal voltages of each battery add together to create a total circuit voltage. The series current and amp-hour capacity is the same as that of one single battery.
Sometimes a viable solution is to connect multiple batteries in series, parallel, or a combination of the two. It is good practice to only connect batteries of identical capacity, type, and age. Series If you are hooking batteries up in series, connect the positive terminal of one to the negative of the next, and so on.
Series Connection: In a battery in series, cells are connected end-to-end, increasing the total voltage. Parallel Connection: In parallel batteries, all positive terminals are connected together, and all negative terminals are connected together, keeping the voltage the same but increasing the total current.