A dealer is putting together a lithium conversion kit for 48V golf carts. The kit needs main cables, a fuse and a way to disconnect the battery, and the service manager wants to choose them correctly for the pack and the cart.
Size the cables and fuse for the cart’s peak and continuous current, not for the pack’s capacity. Choose cable that carries the current with low voltage drop over its length, place a fuse close to the pack positive, sized above normal peak current but below the cable’s limit, and include a disconnect for service. Use terminals and lugs rated for the cable, and confirm the pack’s BMS current limits and terminal sizes with the supplier before finalising the kit.
Cable
- Current. Use the controller’s maximum current and the typical continuous current from a real route.
- Length. Measure the full loop, positive and negative. Longer runs need thicker cable to limit voltage drop.
- Insulation and routing. Choose flexible, oil-resistant cable, and protect it where it passes metal edges.
Fuse and disconnect
- Position. Fit the main fuse as close as possible to the pack positive terminal.
- Rating. Above the normal peak current, so it does not blow during hill climbs, but low enough to protect the cable.
- Type. A DC-rated fuse with a breaking capacity suitable for a lithium pack.
- Disconnect. A switch or breaker that technicians can open for service and storage.
Redway’s cable, fuse and breaker sizing guide gives the method, and our BMS current article explains how pack current versions differ.
Terminals and assembly
Use crimped lugs matched to the cable size and the pack terminal, tightened to the stated torque. Loose or poorly crimped joints heat up and are a common cause of faults. Include torque values and a photo of correct assembly in the kit instructions; see our dealer kit article.
Risk limits
Cable and fuse ratings depend on temperature, routing and local electrical rules. Have an experienced technician approve the kit, and confirm pack limits for your model. This article is general guidance for dealers.
Additional perspectives
Standardise one cable and fuse set per cart model. Fewer variants mean fewer mistakes in the workshop.
Redway Tech Editorial Team – Service manager perspective
Check voltage drop under hill current, not just the cable’s current rating. A cable that is safe can still waste power and trigger low-voltage warnings.
Redway Tech Editorial Team – Electrical engineer perspective
Ask the supplier to review the kit list before the first order. It costs little and avoids mismatched terminals on the first installations.
Redway Tech Editorial Team – Dealer perspective
Specifications are taken from Redway product pages as of October 2026. Where a figure isn’t published, this article says so. Confirm current specifications for your model with Redway before ordering. This article is general guidance, not a site-specific engineering assessment.
Related products
- 48V 100Ah LiFePO4 Lithium Golf Cart Battery Manufacturer (BMS 250A)
- 48V 100Ah LiFePO4 Lithium Golf Cart Battery Factory (BMS 315A)
- 48V 100Ah LiFePO4 Lithium Golf Cart Battery OEM (BMS 200A)
- 48V 160Ah LiFePO4 Lithium Golf Cart Battery Factory (BMS 315A)
- 48V 100Ah Lithium Golf Cart Battery OEM Factory
Related topics
- Cable, Fuse & Breaker Sizing
- Golf Cart Battery Installation, Wiring & Conversion
- Golf Cart Battery Safety & Protection
- 48V Golf Cart Battery Systems
- Golf Cart BMS, Monitoring & State of Charge
- Golf Cart Battery Troubleshooting & Repair
- Golf Cart Dealers & Vehicle Buying
- Lithium vs Lead-Acid Golf Cart Batteries
- Golf Cart Models & Battery Fitment
- Golf Cart Battery Brands, OEM & Suppliers
