Wiring a Battery Bank | Series vs. Parallel
[embed]https://www.youtube.com/watch?v=xbSTCd7bcUs[/embed] Based on the energy audit of your sailboat or marine vessel, you should have determined the capacity of the house batteries you need and the voltage that your system will run at. These two measurements will dictate how you need to connect your batteries. There are three ways that your battery bank can be wired together.
Parallel
For those whose system can run on 12V, wiring in parallel will allow you to maintain the voltage and add the capacity together, increasing the amperage. By connecting the positive terminals on all your batteries and the negative terminals on all your batteries, you will have a parallel connection.Series
On the other hand, some large marine electrical systems require 24V, 36V< or even 48V systems. In these cases, you would want to wire in series. This will maintain the amperage of your batteries but increase the voltage up to 48V with four batteries wired together. By using a jumper connection between the positive and negative terminals of each of your batteries you will have a series connection.Series-Parallel
In some cases, boaters may need a higher voltage system but may also want to increase their battery capacity. A series-parallel connection will facilitate this. With four batteries, you can connect each pair in series to get 24V and then wire the two paired batteries to each other in parallel to double the capacity.
