Golf Cart Battery Wiring Diagram
Pick your system voltage and battery type to instantly generate the correct series wiring diagram, every jumper cable and main lead, labeled.
Quick answer: Every standard golf cart wires its batteries in series: connect the positive (+) terminal of one battery to the negative (−) terminal of the next, all the way down the line. When you’re done, exactly two terminals are still open, the negative of the first battery and the positive of the last, and those become your main cables to the cart. The generator above draws this for your exact pack so you can see every jumper before you pick up a wrench.
Which battery setup makes your voltage?
The same system voltage can be built several ways depending on the batteries used. A 36-volt cart almost always runs six 6-volt batteries. A 48-volt cart is the most varied: it can be six 8-volt, eight 6-volt, or four 12-volt batteries. A 72-volt cart typically uses six 12-volt batteries. Lithium changes the picture entirely, most lithium upgrades are a single integrated drop-in pack, so there is no battery-to-battery jumpering at all.
| System | Battery | Quantity | Wiring |
|---|---|---|---|
| 36 Volt | 6V | 6 batteries | All in series |
| 48 Volt | 8V | 6 batteries (most common) | All in series |
| 48 Volt | 6V | 8 batteries | All in series |
| 48 Volt | 12V | 4 batteries | All in series |
| 72 Volt | 12V | 6 batteries | All in series |
| 48 / 72 Volt | Lithium | 1 drop-in pack | Main leads only |
Notice that every lead-acid configuration uses one fewer jumper cable than the number of batteries, a six-battery pack needs five jumpers, an eight-battery pack needs seven. If you want the full picture of how many batteries your specific cart carries and why, our guide on how many batteries a golf cart has breaks down every voltage class.
Why series wiring (and not parallel)?
Golf cart motors and controllers are built for a specific pack voltage, 36, 48, or 72 volts. Series wiring is what stacks the individual battery voltages up to that target. Parallel wiring, by contrast, keeps voltage the same but multiplies capacity, which is not what a cart needs at the pack level. That is why you will never see a stock cart with its main pack wired in parallel. The only place parallel wiring shows up is inside certain lithium builds, which the BMS handles internally, you never wire it yourself.
Because all the batteries carry the same current in series, a single weak or mismatched battery drags down the entire pack. This is the number-one reason technicians insist on replacing the whole set at once rather than swapping one battery. A fresh battery paired with five tired ones will be forced to over-work and fail early. Keeping the pack matched is also central to good golf cart battery maintenance.
Jumper cables, lugs, and torque
The short cables that link one battery to the next are called jumper cables (or interconnects). They need to be the right gauge for your pack current, undersized cable runs hot and wastes range to voltage drop. For golf carts, 6 AWG is a common minimum and 4 AWG is a safe upgrade; high-amp performance builds step up further. You can size yours precisely with our golf cart battery cable size guide. Clean every terminal to bright metal, use anti-corrosion spray, and torque each lug to the battery maker’s spec (commonly around 95-110 in-lb for golf cart posts). A loose connection is the most common cause of melted terminals and a cart that suddenly loses power.
What changes with lithium
If you are converting to lithium, the wiring usually gets simpler, not harder. Most 48V and 72V lithium upgrades are a single sealed pack with a built-in battery management system (BMS), so you remove the entire lead-acid bank and all its jumpers and connect just two main leads. A few modular kits instead use four 12.8V batteries in series to reach 51.2V (the true voltage that the industry labels “48V”). Either way, always follow the pack’s own terminal markings, some lithium packs place both main terminals on the same end. For choosing a pack, see our best lithium golf cart battery roundup.
Safety before you wire
Battery banks store enormous current. Before touching anything, remove rings and watches, work with insulated tools, and disconnect the main negative lead first when taking a pack apart (and reconnect it last when rebuilding). Never let a wrench bridge a positive terminal to the frame, a dead short across a golf cart pack can weld metal instantly. If a connection looks corroded, hot, or discolored, fix it before driving. When in doubt, photograph your existing wiring before you disconnect it, then use the diagram above to confirm the rebuild matches. According to the U.S. Consumer Product Safety Commission, improper battery handling is a leading cause of small-EV fires, so take the extra minute to get it right.
Bottom line
Whatever your voltage, the logic is identical: chain positive-to-negative through every battery, and the two leftover terminals, first negative, last positive, are your main leads. Use the generator to confirm the exact battery count and jumper layout for your pack, match all batteries as a set, size your cables correctly, and torque every lug. Get those four things right and your golf cart battery wiring will be safe, efficient, and ready to roll.