Connecting Batteries in Series - Charging 12V Lithium Batteries

📖 My best-selling book on Amazon: https://cleversolarpower.com/off-grid...
🎁 Free diagrams: https://cleversolarpower.com/free-dia...

In this video, I will talk about connecting batteries in series. With a focus on 12V lithium batteries in series, charging 12V batteries in series, and the overall concept of series batteries.

We start with the basics: understanding how connecting batteries in series can increase your system's voltage while keeping capacity the same. Imagine taking two 12V 100Ah batteries and wiring them into a single 24V 100Ah battery.

But what about the power? Does it remain unchanged whether you choose series or parallel wiring? I'll break down the math, showing that the total power remains constant, and how this understanding can guide your system's configuration for maximum efficiency.

The video has practical advice, distilled into three rules for connecting batteries in series to avoid common pitfalls, such as mixing different capacities or chemistries, and the importance of charging your batteries before a series connection.

But there's more to it than just the how-to. I delve into the pros and cons, highlighting the advantages like cost savings on wiring and charge controllers due to increased voltage, reduced voltage drop, and more efficient power distribution. Yet, the story wouldn't be complete without addressing the potential downsides, such as the challenges of battery imbalance and the need for voltage converters for your 12V appliances.

Through diagrams, and wiring examples, from the simple 2S configuration to more complex setups like 4S2P, I explain how to design and optimize your battery system. Whether you're looking to build a 24V or 48V system, this video has you covered, offering insights into balancing, charging, and the critical role of battery management systems (BMS) and lead-acid batteries.

As we explore the intricate dance of connecting batteries in series, my goal is to help decrease the cost of your off-grid solar power system without compromising on performance. From selecting the right batteries and chargers to understanding the nuances of series vs. parallel connections, this video is for anyone looking to enhance their off-grid solar setup.