How Do You Connect Multiple Deep Cycle Batteries?
By connecting multiple deep cycle batteries, you can increase either the storage capacity or the voltage of any battery system. The most common connection is a parallel termination, in which the power is increased, but the voltage remains the same as each individual battery. In other words, a bank of parallel-connected 12-volt batteries will still provide 12 volts of power. A series connection, meanwhile, increases the voltage by each individually connected battery: four series-connected 12-volt batteries will provide 48 volts of power. Lay the batteries next to each other, so that the long sides of the batteries are 1 or 2 inches apart. (Maintain this space between the plastic cases–the batteries will swell slightly during certain times of the year.) Attach the battery post connectors to each top post on the deep cycle batteries. Use the 1/2-inch end wrench to tighten the clamp’s bolt. Do not over tighten the bolt, but make it tight enough so the clamp cannot move on the battery post
