Upgrade Your E-Z-GO Express 6 to Fleet Lithium
A loaded Express 6 asks a lot of a lead pack: six adults, a full day of shuttling, and hills. The four 12V flooded batteries sag under that load and give you a slow, weak last hour. One 51V Fleet Lithium pack holds voltage flat all day, saves roughly 140 lb, and recharges between shifts instead of overnight.
Choose Your Capacity
| Capacity |
Range* |
Best For |
| 51V 65Ah |
Up to 27 mi |
Stock carts only |
| 51V 105Ah |
Up to 50 mi |
Daily driving |
| 51V 168Ah |
Up to 75 mi |
All-day use |
| 51V 210Ah |
Up to 90 mi |
Max range, fleet use |
65Ah is for stock motors and controllers only. If your cart is lifted, loaded, or running an upgraded motor or controller, start at 105Ah.
What's Included
- 51V NexGen Fleet Lithium LiFePO4 Battery (selected capacity)
- CH5618 — 58.4V 18A LiFePO4 Smart Charger
- Vehicle-specific mounting bracket kit — matched to your cart's factory battery tray
- AC0219 — AC Power Connector
- Cable Set
- Digital State-of-Charge Gauge
- All mounting hardware
Key Specs
- 300A NexGen BMS with 800A peak surge
- Patent-pending fire suppression system
- Built-in cold-weather heater — activates automatically below 32°F (standard, not an add-on)
- Bluetooth monitoring — voltage, temp and cycle count from your phone
- 10-year warranty — designed and assembled in the USA
Fitment Guide
| OEM Model |
Years |
Factory Battery Tray |
Bracket Shipped |
| E-Z-GO Express 6 |
2026–2026 |
4x 12V |
Matched to your tray |
Which Do You Have?
This kit is for the 48V lead-acid Express 6. Carts built with E-Z-GO's factory ELiTE lithium pack use a completely different architecture and are not covered.
Will It Work With My Controller?
The Express 6 runs a 350A 48V AC drive. The 51V Fleet pack is a direct electrical match — no reprogramming, no controller swap, and no wiring changes.
Frequently Asked Questions
Will this fit my Express 6?
Yes, if it came from the factory with four 12V lead-acid batteries.
Does it fit a factory ELiTE lithium Express 6?
No. Factory-lithium carts are a separate platform and cannot use this kit.
Six passengers — which capacity?
Start at 105Ah. If you shuttle all day or run hills, 168Ah is the better buy.
How long does installation take?
30–60 minutes with basic hand tools.
Does it work in cold weather?
Yes. The built-in heater activates automatically below 32°F — standard on every pack.
*Range estimates are maximums under ideal conditions (flat terrain, single rider, 12–15 mph, 70°F). Actual range varies with terrain, weight, speed, and temperature.
