If you’re considering swapping out your golf cart batteries, you might ask: “Can I use 12V car batteries instead?” While it sounds budget-friendly, it’s not that simple. We’ll break down how your cart’s electrical system works, the risks of mismatched batteries, and the best setup for peak performance.
Understanding Golf Cart Battery Systems
Most 36V golf carts come equipped with six 6V batteries or three 12V batteries wired in series to provide the necessary voltage. Here’s a quick breakdown of the most common battery configurations:
6V Batteries (Six in Series) – Provides high amp-hour capacity, meaning longer run time. This is a common setup for older or standard 36V carts.
8V Batteries (Four in Series) – Used in some golf carts to balance weight and power needs.
12V Batteries (Three in Series) – A possible option, but comes with some trade-offs.
In most cases, deep-cycle lead-acid batteries are used because they provide steady power over long periods. However, modern lithium batteries (LiFePO4) are becoming a popular upgrade due to their efficiency and longevity.
Using 12V Batteries in a 36V Golf Cart: Is It Possible?
Yes, you can use three 12V batteries in series to power a 36V golf cart, but it’s important to understand the limitations and potential downsides before making the switch.
Starter Batteries vs. Deep-Cycle Batteries
Not all 12V batteries are the same. Some people mistakenly install starter batteries, which are designed for short bursts of energy (like in cars), rather than deep-cycle batteries, which are made to provide steady power over long durations.
For a golf cart, you must use deep-cycle 12V batteries, as starter batteries will wear out quickly and fail to deliver consistent performance.
How to Wire 12V Batteries in a 36V Golf Cart
If you decide to use three 12V batteries, proper wiring is crucial. They must be connected in series, meaning the positive terminal of one battery connects to the negative terminal of the next. The final positive and negative terminals will then be used to power the golf cart. If done correctly, this setup will provide the necessary 36 volts, but remember, it won’t necessarily provide the same performance as a traditional deep-cycle setup.
A Better Alternative: A Single 36V Lithium Battery
If you're looking for a long-term solution with better efficiency, a 36V lithium (LiFePO4) battery is a game-changer. Unlike lead-acid batteries, which degrade over time and require regular maintenance, lithium batteries offer consistent performance, faster charging, and a much longer lifespan—up to 10 years in some cases.
Lithium batteries are also significantly lighter than their lead-acid counterparts, reducing the overall weight of your golf cart and improving efficiency. Plus, they charge up to five times faster, meaning you’ll spend less time waiting and more time on the move.
Another major benefit is that lithium batteries are maintenance-free. No more checking water levels or cleaning terminals—just charge it and go. And because they provide a steady voltage output, your golf cart won’t slow down as the battery drains, unlike lead-acid setups that gradually lose power as they discharge.
Conclusion
Not all 12V batteries are created equal, and using the wrong ones in your 36V golf cart can lead to poor performance and even damage. Prioritize compatibility, capacity, and maintenance to get the most out of your cart. If you’re looking for a hassle-free upgrade, consider a single 36V lithium battery for a seamless power solution.
