How to Connect a Lithium Battery to a Golf Cart
Connecting a lithium pack is straightforward if you follow the order: safely remove the old batteries, mount the new pack, wire the main cables, and set up a lithium charger. Here is the full sequence.
Quick answer: To connect a lithium battery to a golf cart: 1) turn off the cart and disconnect the existing pack, removing the negative cable first; 2) remove the old batteries and clean the tray; 3) mount and secure the lithium pack; 4) connect the main positive and negative cables to the pack terminals (positive first, then negative), matching the original polarity; 5) install a lithium-profile charger and, on some Club Cars, bypass the OBC; 6) power on and verify voltage. Always disconnect negative first and reconnect negative last for safety.
01 // Step 1: Safely Remove the Old Batteries
Turn the cart off and set the tow/run switch to tow if equipped. Disconnect the negative main cable first to avoid shorts, then the positive, then the inter-battery links. Remove the old batteries and clean the tray of acid residue and corrosion before installing lithium. For corrosion cleanup, see our corrosion chemistry guide.
02 // Step 2: Mount the Lithium Pack
Place the lithium battery (or modules) in the tray and secure it so it cannot shift — lithium packs are lighter, so factory hold-downs may need adapting. Keep terminals accessible and oriented to match your cable routing. Confirm how many units you need in our lithium count guide.
03 // Step 3: Connect a Lithium Battery to a Golf Cart Main Cables
Attach the main positive cable to the pack’s positive terminal first, then the negative cable to negative, matching the original polarity exactly. Torque the connections properly and protect them. If using four 12V modules, wire them in series first, then connect the main leads to the free positive and negative ends.
04 // Step 4: Charger and OBC
Lithium requires a lithium-profile charger — never reuse an old lead-acid charger. On Club Car carts with an onboard computer, you may need an OBC bypass so the pack charges. Then power the cart on and confirm pack voltage with a meter before driving.
05 // Safety Checklist
- Disconnect negative first; reconnect negative last.
- Never reverse polarity — it can destroy the BMS.
- Use a lithium charger only.
- Verify voltage before the first drive.
Review the trade-offs once more in our lithium disadvantages guide.
Lithium Wiring Summary
To connect a lithium battery to a golf cart: disconnect old pack (negative first), mount the lithium unit, wire main cables (positive first), add a lithium charger and OBC bypass if needed, then verify voltage. Negative off first, negative on last.