Before you settle on a transfer cart, decide what you’re actually choosing. Load capacity and deck size are where most buyers start, and for good reason.But the spec that ends up shaping your day-to-day operation is the power supply. Pick wrong and you’ll be juggling charging stops mid-shift, cables that wear out and snap, track insulation faults, or an installation you can’t extend when the line grows. Pick right and the cart just does its job, shift after shift, without you giving it a second thought.This guide covers the six ways transfer carts are powered and the five conditions that should decide which one belongs on your factory floor.
The cart carries its own lead-acid or lithium battery and needs no track wiring. Routes are completely flexible — one cart can serve multiple stations, cross between workshops, and even work outdoors. Lithium batteries typically last 2,000+ charge cycles and support fast charging between tasks; lead-acid is cheaper upfront but wears out after roughly 300–800 cycles.
Best for: changing layouts, multi-station work, outdoor use, duty of about 8–12 hours per dayWatch out: charging stops cut into production, and batteries must be replaced every 3–8 years
The simplest and cheapest design. The cart drags a cable behind it, guided by a ground cable and steel wire, so there are almost no failure points. But the cable limits travel to roughly 50 meters and can tangle or get in the way of forklifts and pedestrians.
Best for: short, straight, fixed routes on a tight budget
Watch out: cable wear, tangling, and floor obstruction
A drum on the cart automatically pays out and rewinds the cable, feeding 380 V AC continuously. There is no voltage drop under heavy load, and the cart can run 24 hours a day. Heat-resistant cables make this a common choice in steel mills and foundries.
Best for: fixed routes up to about 200 meters, continuous heavy duty, hot workshops
Watch out: cables wear and are typically replaced every 3–5 years; routes beyond 200 m are not practical
The running rails themselves carry the power: a floor transformer steps 380 V down to a safe 36 V, and the cart steps it back up on board. With no exposed cable and no battery, this type runs 24 hours a day, is easy to automate, and shrugs off hot parts and heavy objects dropped on it.
Best for: fixed indoor routes, continuous automation, high-temperature shops, and long distances (extra transformers may be needed beyond ~100 m)
Watch out: the track must be insulated, installation costs are higher, and wet or dusty conditions can cause leakage — not for outdoor or rainy sites
A conductor line runs in a trench beside the track, and a collector on the cart picks up power continuously. Distance is practically unlimited, and several carts can share the same line — ideal for fleets and very long factory lines.
Best for: very long routes, multi-cart operation, clean indoor workshops
Watch out: dust and water can short the contacts, and installation cost is higher
A small on-board generator powers the cart completely independently of the factory grid — suited to open yards, construction sites, and sites without a stable power supply.
Best for: outdoor sites with no grid access
Watch out: exhaust and noise rule it out for enclosed workshops, and fuel plus maintenance make it the most expensive to run
| Type | Power source | Max distance | Continuous duty |
| BXC · Battery | Onboard lead-acid / lithium | Unlimited (8–12 h per charge) | ≤ 8–12 h/day |
| BTL · Tow cable | 380 V drag cable | ≤ 50 m | 24 h possible |
| BJT · Cable reel | 380 V cable drum | ≤ 200 m | 24 h |
| BDG · Low-voltage rail | 36 V through the rails | Unlimited (extra transformers beyond ~100 m) | 24 h |
| BHX · Busbar | Sliding contact line | Unlimited | 24 h |
| Diesel | Onboard generator | Unlimited | Continuous |
