Yes, a standard 36V or 48V golf cart can be made to run on 12V car batteries, but it is generally not recommended for regular use. The primary reason is the fundamental difference in battery design: car batteries are starter batteries designed to deliver a short, powerful burst of energy to crank an engine, while golf cart batteries are deep-cycle batteries built to provide a lower, steady amount of power over a much longer period. Using car batteries in a golf cart will lead to significantly reduced performance and a much shorter battery lifespan.
To power a 36V golf cart, you would need to wire three 12V car batteries in a series connection to achieve the required voltage. For a 48V cart, you would need four batteries. While this creates the correct system voltage, the batteries will struggle with the continuous discharge demands. You'll notice a much shorter driving range per charge, a notable lack of power, especially on inclines, and the batteries will degrade quickly because they aren't designed for deep, repeated discharging.
The following table compares the key differences between using dedicated golf cart batteries and car batteries:
| Feature | Deep-Cycle Golf Cart Battery (6V or 8V) | Standard 12V Car Battery |
|---|
| Design Purpose | Long, sustained power delivery for electric vehicles | Short, high-power bursts for engine starting |
| Depth of Discharge | Can be safely discharged to 50-80% regularly | Should not be discharged below ~20% frequently |
| Cycle Life | 1,200+ cycles (to 50% depth of discharge) | 100-200 cycles (if deep-cycled, which damages them) |
| Driving Range | Optimal range as designed for the cart | Reduced range, often by 40% or more |
| Hill Climbing Power | Maintains consistent power output | Significant power drop, may struggle |
| Long-Term Cost | Higher upfront cost, but much lower cost per cycle | Lower upfront cost, but frequent replacement needed |
In summary, while technically possible for a temporary fix or in an emergency, using car batteries is an inefficient and costly long-term solution. The poor performance and rapid battery failure make investing in proper deep-cycle batteries the only sensible choice for reliable golf cart operation.
