EZGO Express S4 (2020-2022) 72V Lithium Battery Conversion Kit — Fleet Lithium
EZGO Express S4 (2020-2022) 72V Lithium Battery Conversion Kit — Fleet Lithium - 76.8V 105Ahis backordered and will ship as soon as it is back in stock.
10-Year Warranty / 5,000+ Cycles
10-Year Warranty / 5,000+ Cycles
Built for the long haul. Every Promise-series battery is backed by a 10-year manufacturer's warranty and rated for 5,000+ cycles at 80% depth of discharge. View full warranty details.
Product Highlights
Product Highlights
EZGO Express S4 (2020-2022) 72V Lithium Battery Conversion Kit — Fl...
Upgrade Your E-Z-GO Express S4 to Fleet Lithium
The 72V Express S4 hauls four people, and six 12V flooded batteries are the reason it feels heavy doing it. Swap to one 76.8V Fleet Lithium pack and you drop roughly 250 lb, keep full power under a full load, and recharge between runs instead of overnight.
Choose Your Capacity
| Capacity | Range* | Best For |
|---|---|---|
| 76.8V 105Ah | Up to 50 mi | Daily driving |
| 76.8V 168Ah | Up to 75 mi | All-day use |
What's Included
- 76.8V NexGen Fleet Lithium LiFePO4 Battery (selected capacity)
- CH8713 — 87.6V 13A LiFePO4 Smart Charger
- BR4480 — Bracket Kit - E-Z-GO Express S4 / S6
- 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 S4 | 2020–2022 | 6x 12V | BR4480 |
Which Do You Have?
Confirm your S4 is the 72V six 12V build before ordering. The 48V S4 uses the same BR4480 bracket but a different pack and charger.
Will It Work With My Controller?
The factory 350A 72V AC controller is a direct electrical match for the 76.8V Fleet pack. Nothing needs reprogramming.
Frequently Asked Questions
Will this fit my Express S4?
Yes, for the 72V six 12V lead-acid build. BR4480 is the same bracket E-Z-GO S4 owners already use.
Does it fit the 48V S4?
No — order the 48V Express S4 kit.
Does it fit a factory ELiTE lithium S4?
No.
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.
Quick answer: the EZGO Express S4 (2020-2022) 72V Lithium Battery Conversion Kit — Fleet Lithium from Fleet Lithium has nominal voltage 76.8V, capacity 105 AH, continuous / peak discharge 300A continuous / 800A peak surge, cycle life 5,000+ cycles at 80% Depth of Discharge (DoD), chemistry Lithium Iron Phosphate (LiFePO4), warranty 10 Year Warranty. The complete specification table for this configuration is below.
Electrical & Performance
- Nominal Voltage
- Factory Pack Voltage
- Capacity
- Nominal Energy
- Continuous / Peak Discharge
- Charging Voltage
- Charging Current
- Discharge Cutoff Voltage
- Cycle Life
Battery & BMS
- Chemistry
- Battery Technology
- Battery Type
- EV Battery Type
- BMS Features
- 300A Continuous / 800A Peak Surge Discharge , Advanced Battery Management System (BMS) , Internal Heating for Cold Temp Charging , Active Cell Balancing for Extended Life Cycle
- Safety Features
- Thermal Regulation (Heated Cells) , Low Voltage Disconnect (LVD) , Over Charge / Discharge Protection , Over Current Protection
- Battery Features
- Operating Temperature
- Charging: 32 to 140 ºF (0 to 60 ºC) , Discharging: -4 to 149 ºF (-20 to 65 ºC) , Storage: 50 to 113 ºF (10 to 45 ºC)
Dimensions & Weight
- Dimensions (L x W x H)
Fitment & Compatibility
- Make
- Model
- Model Year
- 2020 , 2021 , 2022
- Model Number
- Motor Controller
Warranty & Compliance
- Warranty
- Certifications
- UL 1642 , UL 1973 , CE , RoHS , UN38.3 , IP67
- Standards
- Condition
- Manufacturer Relationship
Product Details
- Classification
- Colour / Finish
- Vendor
- Fleet Lithium
- Product Type
- Lithium Battery Conversion Kit
- SKU
- EZESH-76105
- Shipping Weight
- 147.0 lb
Let customers speak for us
The 12V voltage reducer corrected the unstable behavior that had affected the lights and other accessories. The output has remained steady through regular use.
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Easy installation and great technical support.
After installing the Club Car 48V kit, throttle response felt more immediate and the vehicle no longer felt sluggish late in the charge. The cleaner battery compartment is another welcome improvement.
Cabels look great. Will be installing them by the end of the week. Frank
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The parts for the EZGO TXT kit were organized clearly and the installation sequence made sense. The finished setup looks tidy and removes the routine upkeep of the old battery bank.
The 76V replacement charger replaced the previous unit without requiring a complicated setup. Charging has been predictable, and the connector fits securely.
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The parts for the EZGO RXV kit were organized clearly and the installation sequence made sense. The finished setup looks tidy and removes the routine upkeep of the old battery bank.
The 12V voltage reducer provided a clear path for running standard accessories from the higher-voltage battery system. The result has been reliable and easy to service.
The BlueMax 105Ah marine battery eliminated routine water checks and corrosion cleanup while providing smoother power. The battery compartment is cleaner and easier to inspect now.
The 51V 105Ah bundle solved the voltage drop and inconsistent performance that had developed with the previous batteries. The vehicle now feels predictable from the beginning of a trip to the end.
