How To Hook Two 12 Volt Batteries Together. Not the one that is connecting the two batteries the one that would be the output of the two in-series batteries. Do not over tighten the bolt but make it tight enough so the clamp cannot move on the battery post.
For charging 6 volt batteries in series with a 12 volt charger you can use a single charger. Connecting a battery in parallel is when you connect two or more batteries together to increase the amp-hour capacity with a parallel battery connection the capacity will increase however the battery voltage will remain the same. Two 12 volt batteries in parallel give you 12 volts.
For charging 6 volt batteries in series with a 12 volt charger you can use a single charger.
If you want to add extra capacity to the system you will have to wire the system in parallel configuration. Connecting in series increases voltage only. Most solar panels and batteries come in 22436V etc. There are two methods to connect two 12 volt batteries.
