Connecting 12V 26Ah Batteries in Series or Parallel for Inverter Use: A Comprehensive Guide

When it comes to connecting batteries for an inverter, the choice between series and parallel configurations is crucial. Both configurations have distinct advantages and can be used depending on your specific needs for voltage and capacity. In this article, we will explore how to connect four 12V 26Ah batteries in series or parallel, along with the necessary steps and safety guidelines.

Connecting Batteries in Series

When you connect batteries in series, the voltage of the entire setup increases, while the total capacity remains unchanged. This configuration is ideal if you have an inverter that requires a higher voltage to function optimally.

Key Points:

The voltage will add up. The total capacity Ah remains the same. The configuration provides a higher voltage but the same capacity.

Steps to Connect in Series:

Connect the positive terminal of the first battery to the negative terminal of the second battery. Connect the positive terminal of the second battery to the negative terminal of the third battery. Connect the positive terminal of the third battery to the negative terminal of the fourth battery. The remaining positive terminal of the first battery and the negative terminal of the fourth battery will be your output terminals, resulting in a total voltage of 48V.

Connecting Batteries in Parallel

When you connect batteries in parallel, the voltage remains constant while the total capacity increases. This configuration is ideal if you require more capacity from your batteries at the same voltage.

Key Points:

The voltage will remain the same. The total capacity increases, providing more backup power. The setup results in a higher capacity but the same voltage.

Steps to Connect in Parallel:

Connect all the positive terminals of the batteries together. Connect all the negative terminals of the batteries together. The combined output will be 12V with a total capacity of 104Ah.

Choosing Between Series and Parallel

The choice between series and parallel depends on your specific requirements for voltage and capacity:

Use Series: If you need a higher voltage to power your inverter effectively. Use Parallel: If you need more capacity for longer runtime at the same voltage.

Connecting to an Inverter

The configuration you choose will determine how you connect the batteries to your inverter:

Series Connection (48V)

Connect the output terminal from the positive of the first battery to the inverter's 48V input designated for the positive input. Connect the output terminal from the negative of the fourth battery to the inverter's 48V input designated for the negative input.

Parallel Connection (12V)

Connect the combined positive terminals of the batteries to the inverter's 12V input designated for the positive input. Connect the combined negative terminals of the batteries to the inverter's 12V input designated for the negative input.

Safety Precautions

Working with batteries and inverters requires careful attention to ensure safety and optimal performance:

Ensure all batteries are of the same type and state of charge to maintain consistency. Use proper gauge wiring capable of handling the current that will flow through the system. Install fuses or circuit breakers to provide a safety buffer in case of overcurrent or short circuits. Follow manufacturer guidelines and safety protocols when working with batteries and inverters to avoid potential hazards.

By following these steps and safety guidelines, you can effectively connect your 12V 26Ah batteries in series or parallel to your inverter and ensure reliable power for your needs.