Advanced EV Advent 48V Lithium Battery Conversion Kit — Fleet Lithium
Advanced EV Advent 48V Lithium Battery Conversion Kit — Fleet Lithium - 51V 105Ahis backordered and will ship as soon as it is back in stock.
Advanced EV Advent 48V Lithium Battery Conversion Kit — Fleet Lithium
Purpose-Built for the Advanced EV Advent
The Advent is Advanced EV's flagship personal transportation vehicle — available in 2-passenger, 4-passenger (4L), and 6-passenger (6L) configurations. This 51.2V LiFePO4 conversion kit replaces the entire factory lead-acid bank with a single lightweight battery, delivering 3–4× the range with zero maintenance.
Choose Your Capacity
| Capacity | Energy | Range | Best For |
|---|---|---|---|
| 51V 65Ah | 3.33 kWh | Up to 27 mi | Stock carts, short trips |
| 51V 105Ah | 5.38 kWh | Up to 50 mi | Daily driving, golf courses |
| 51V 168Ah | 8.60 kWh | Up to 75 mi | All-day use, hilly terrain |
| 51V 210Ah | 10.75 kWh | Up to 90 mi | Maximum range, fleet/commercial |
65Ah is for stock motors/controllers only. If your cart has performance upgrades, choose 105Ah or higher.
Fitment Guide
| OEM | Model | Years | Factory Voltage |
|---|---|---|---|
| Advanced EV | Advent 2 | 2020–Present | 48V |
| Advanced EV | Advent 4L | 2020–Present | 48V |
| Advanced EV | Advent 6L | 2020–Present | 48V |
| Advanced EV | Advent Specialty (Beverage, Hospitality, Ambulance) | All Years | 48V |
Controller Compatibility
The Advent uses a 48V AC motor controller. The 51.2V Fleet Lithium pack is a direct replacement for the factory lead-acid bank. No controller reprogramming required.
What's Included
- 51V NexGen Fleet Lithium LiFePO4 Battery (selected capacity)
- CH5618 — 58.4V 18A LiFePO4 Smart Charger
- BR4986 — Advanced EV Bracket Kit
- AC0219 — AC Power Connector with Cover Plate
- CB0917 — 1/0 AWG 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 when charging
- Bluetooth 5.0 monitoring — voltage, temp, cycle count from your phone
- 10-year warranty — designed and assembled in the USA
What makes the Advent different from the Click or Horizon?
The Advent line (2, 4L, 6L) is Advanced EV's original platform — the most widely sold model with the largest aftermarket support. While all three share the same 48V system and bracket kit, the Advent is available in more seating configurations including specialty vehicles like beverage carts and ambulances.
Do I need to reprogram my controller?
No. Works with your factory 48V AC controller out of the box.
How long does installation take?
30–60 minutes with basic hand tools. Remove the old lead-acid batteries, drop in the Fleet Lithium pack, connect cables, and ride.
Does it work in cold weather?
Yes. The integrated heater activates automatically below 32°F when plugged in for charging — it's standard on every pack, not an add-on.
*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 Advanced EV Advent 48V Lithium Battery Conversion Kit — Fleet Lithium from Fleet Lithium has nominal voltage 51.2V, capacity 105 AH, continuous / peak discharge 300A continuous / 800A peak surge, cycle life 5,000+ cycles at 80% Depth of Discharge (DoD), cell 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
- Cell Chemistry
- 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 , Built in Fire Extinguisher for Ultimate Safety
- Safety Features
- Thermal Regulation (Heated Cells) , Low Voltage Disconnect (LVD) , Over Charge / Discharge Protection , Over Current Protection
- Battery Features
- EV 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)
- Weight
- 118.0 lb
Fitment & Compatibility
- Make
- Model
- Model Number
- Motor Controller
Warranty & Compliance
- Warranty
- Certifications & Standards
- UL 1642, UL 1973, CE, RoHS, UN 38.3, IP67
- Condition
- Manufacturer Relationship
Product Details
- Classification
- Colour / Finish
- Vendor
- Fleet Lithium
- Product Type
- Lithium Battery Conversion Kit
- SKU
- AD4986
Let customers speak for us
What a fantastic upgrade from my old acid batteries. It was time and I’m so impressed. Shipping came smoothly. Customer service has been fantastic and looking forward to the adventures to come including camping, RV, fishing, boating.
The customer service and the battery itself from Fleet Lithium is unbeatable. One of the best experiences as a customer I have ever had. They stand by their product and help you every step of the way to ensure you are happy in your purchase. The install was easy once you know where everything is supposed to go and the battery has performed flawlessly in my Bad Boy Recoil since installation. It made it a lot lighter and the buggy is obviously quicker now and I was able to ride it around the farm for hours in fast mode the other day and only used 25% of the battery carrying a buddy and myself. It is really amazing.
Cannot thank these guys enough. Our Hunting buggy is a whole new animal of its own! The team did a great job answering questions, shipping took 3 days and i was even able to reach the support team at 4pm on a Saturday during install. Cannot thank them enough! Don't think twice, Fleet is the way to go for your lithium job.
Was a slight hick up with the darn computer bot. Once we got thru that the service and help with my change over was top notch.
Mt Ranger performance is awesome with the Fleet battery
GREAT SERVICE
Awesome kit. We Live in a very cold climate, our ranger gets a ton of use year round and especially during the winter so the cold weather performance was a must for us. We've had the kit installed for about a year now and it's been perfect. Customer service has been super helpful the one or two times we had questions and we've got a couple of neighbors who run the kits as well and they say the same thing. Kevin and his crew are really top notch!
The 12V voltage reducer corrected the unstable behavior that had affected the lights and other accessories. The output has remained steady through regular use.
The 51V replacement charger is easy to keep available as a backup and works without unnecessary controls. The battery reaches a complete charge consistently during normal use.
The Polaris Ranger EV bundle lined up well with the intended mounting area and the connections were easy to identify. Once installed, the vehicle felt smoother and more consistent through normal use.
The 51V replacement charger connected as expected and has charged the compatible battery consistently. The status indicators are easy to follow, and the unit feels solid in regular use.
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
The BlueMax 200Ah marine battery has provided steady power for onboard electronics and normal time on the water. It is easier to handle than the older battery and has required very little attention between trips.
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.
