EZGO Express S4 / S6 (Select Years) (48V) Fleet Lithium Conversion Kit
Features
Features
Backed by a 10 Year Warranty
Backed by a 10 Year Warranty
EZGO Express S4 / S6 (Select Years) (48V) Fleet Lithium Conversion Kit - 51V 105Ah is backordered and will ship as soon as it is back in stock.
Upgrade Your EZGO Express S4 / S6 to Fleet Lithium
Replace the factory lead-acid batteries in your EZGO Express S4 / S6 with a single, high-performance 51V LiFePO4 pack from Fleet Lithium. Complete conversion kit — battery, charger, bracket, cables, and all hardware included.
Choose Your Capacity
| Capacity | Range | Best For |
|---|---|---|
| 51V 65Ah | Up to 27 mi | Stock carts only |
| 51V 105Ah | Up to 50 mi | Daily driving, golf |
| 51V 168Ah | Up to 75 mi | All-day use |
| 51V 210Ah | Up to 90 mi | Max range, fleet use |
65Ah is for stock motors/controllers only. If your cart has performance upgrades, choose 105Ah or higher.
What's Included
- 51V NexGen Fleet Lithium LiFePO4 Battery (selected capacity)
- CH5618 — 58.4V 18A LiFePO4 Smart Charger
- BR4480 — EZGO Express S4 / S6 Bracket Kit
- AC0219 — AC Power Connector
- CB0917 — Cable Set (35.4")
- 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, cycle count from your phone
- 10-year warranty — designed and assembled in the USA
Fitment Guide
| OEM | Model | Years | Factory Voltage |
|---|---|---|---|
| EZGO | Express S4 | All Years | 48V |
| EZGO | Express S6 | All Years | 48V |
Controller Compatibility
EZGO Express models use a factory 48V controller (Curtis or GE depending on model year). The Fleet Lithium 51V pack is fully compatible — no reprogramming or controller changes required.
Will this fit my EZGO Express S4 / S6?
Yes. The BR4480 bracket kit provides a factory-fit installation for both S4 and S6 models. No modifications required.
Does my controller need reprogramming?
No. The factory 48V controller on Express S4/S6 models accepts the 51V lithium pack without changes.
How long does installation take?
30–60 minutes with basic hand tools.
Does it work in cold weather?
Yes. 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.
Let customers speak for us
Nice and easy install, they work great, much longer range and way better power. Best of all, NO MAINTENANCE
Tried cheaper lithium setups first and they couldn’t handle the amp draw. This one has been solid with no issues.
Absolutely Incredible Range. We replaced our 4 year old Trojan batteries this spring with the 210 AH dual battery kit and we are blown away! We use the buggy to secure the perimeter of a 300 acre lot in South Carolina. We typically put about 200 miles per week on this unit. We have been testing this kit for about a month now and we are getting every bit of 80 miles per charge. Its absolutely unbelievable. Thank you Fleet Lithium!
This screen was so easy to install. We installed our fleet lithium battery about 2 years ago, the screen just came out in April, it took 10 minutes to install and everything works perfectly. Thank you Fleet lithium!
After a few months of use I can confidently say this was worth it. No maintenance, great range, and consistent power every time. Huge upgrade from stock.
I should have just bought this first instead of wasting money on others.
I use my Prowler every day hauling feed and equipment. Other batteries kept shutting down under load. This is the only one that worked right. Glad I spent the money.
Runs strong every time. Exactly what I needed.
The range has doubled compared to my old setup. Installation was straightforward and the instructions were clear. I can now play multiple rounds without recharging.
Tried cheaper lithium setups first and they couldn’t handle the amp draw. This one has been solid with no issues.
Runs strong every time. Exactly what I needed.
No more issues with power cutting out. That alone made it worth it.
No more issues with power cutting out. That alone made it worth it.
Runs strong every time. Exactly what I needed.
Handles hills and heavy loads without hesitation. Very impressed so far.
