Difference Between Connecting a Battery Bank in Series vs a Parallel Series Configuration.
A Battery Bank connects a group of batteries together, either in a series or parallel. By connecting Batteries together, you can increase the voltage, amps or both. Amp hours refers to a steady current of one Ampere for one hour. Go here for more explanation
For Example: A 20 amp battery can discharge 10 amps for 2 hours or 5 amps for 4 hours. Amp hours represents the flow of electricity. Voltage represents the pressure of electricity.
Series Battery Bank
In a Series Battery Bank, a connection of a negative terminal of one battery to the positive terminal of the other battery is required.
For Example: If you have two 12V batteries, both at 10 amps, in a series connection, you will end up with 24V @ 10 amps. In a series array, voltage is added together but the amps stay the same. Then you are able to connect the open terminals to your Charge Controller if living off the grid or the Inverter if grid-tied.
In a series battery bank configuration, it adds the voltage of the batteries but keeps the same amperage rating, also known as amp hours.
Parallel Battery Bank
In a parallel battery bank configuration it increases the amps but the volts stay the same. If you have two 12V batteries @ 10 amps each, your power will then be 12V at 20amps. You will require heavier cable wire however.
Parallel connects a positive terminal of one battery to the positive of another. Then connect the negative to negative terminals. To connect the power, attach a cable to one of the open terminals.
Series-Parallel Battery Bank
The third option is a Series-Parallel connection. Here the battery bank increases the Amps & Volts. You will require at least 4 batteries for this type of system.
If you have 2 sets of batteries already connected in parallel, you can then join them together to create a series. By doing so, you will have a bank that produces 12 volts at 20 amp hours.
Note: Never cross the open ended positive terminals together or it will short circuit the batteries and cause damage.
It is very important that the batteries that you are connecting have the same voltage and capacity rating. Meaning connecting a 12v battery to a 12v battery…NOT a 12v battery to a 6v battery….Otherwise you may end up with charging issues and premature battery life.
Where to Purchase Solar Deep Cycle Batteries
More Deep Cycle Batteries Here ~