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Advanced EV Advent 48V Lithium Battery Conversion Kit — Fleet Lithium

$2,51943 USD
Shipping calculated at checkout.
10-Year Warranty US-Based Support Ships From The USA 30-Day Guarantee Safe Chemistry

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.

  • 5 stars: 6 (60%)
  • 4 stars: 3 (30%)
  • 3 stars: 1 (10%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
R
Roman E.
Clean fit for the Advanced EV 48V kit — Advanced EV 48V kit

The Advanced EV 48V kit 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.

L
Lily N.
Solid upgrade after final adjustments — Advanced EV 48V kit

The Advanced EV 48V kit needed a little repositioning during installation before everything sat exactly right. After the final adjustments, the vehicle has run consistently and the battery area is much cleaner.

D
Daniela I.
Straightforward upgrade with the Advanced EV 48V kit — Advanced EV 48V kit

The parts for the Advanced EV 48V 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.

L
Leonardo Z.
Complete and thoughtfully matched kit — Advanced EV 48V kit

The components in the Advanced EV 48V kit appear selected for the application rather than assembled as a generic package. Fitment was sensible, and the finished system has worked without unexpected issues.

P
Piper T.
Worth the extra installation time — Advanced EV 48V kit

Routing and checking the connections on the Advanced EV 48V kit took longer than expected, but the parts fit correctly. The improved power delivery and reduced maintenance made the extra effort worthwhile.

Z
Zoe D.
Responsive performance after installation — Advanced EV 48V kit

After installing the Advanced EV 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.

E
Elliot G.
A noticeable improvement in everyday use — Advanced EV 48V kit

The Advanced EV 48V kit made the vehicle feel lighter and more consistent during ordinary neighborhood and property use. Charging and checking the remaining battery level are both easier than before.

X
Xavier J.
Good conversion with minor routing work — Advanced EV 48V kit

The Advanced EV 48V kit fit the application, though finding the neatest path for the cables required some patience. The result is secure, clean, and performs well once everything is tightened and checked.

B
Benjamin K.
Noticeably steadier power from the Advanced EV 48V kit — Advanced EV 48V kit

The Advanced EV 48V kit delivers more consistent power than the previous setup, especially when accelerating or climbing. Monitoring the battery status is also much more convenient now.

L
Laura V.
Functional kit with room for clearer labeling — Advanced EV 48V kit

The Advanced EV 48V kit worked as intended, but a few parts could have been labeled more clearly for a first-time installer. After setup, the vehicle operated normally and the lithium system has been easy to monitor.

Let customers speak for us

from 461 reviews
BlueMax Marine 12V 105Ah LiFePO4 Battery (Group 24)
Colbyutahman
fantastic upgrade

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.

BlueMax Marine 12V 105Ah LiFePO4 Battery (Group 24)
Bad Boy Recoil & Recoil iS Lithium Battery Conversion Kit (72V) | Fleet Lithium
Daniel L.
Amazing Product, Amazing Customer Service

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.

Bad Boy Recoil & Recoil iS Lithium Battery Conversion Kit (72V) | Fleet Lithium
Fleet Lithium - High Performance Lithium Batteries
Kevin l.
We're loving this!

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.

Fleet Lithium - High Performance Lithium Batteries
Fleet Lithium 51 Volt Battery Bundle for Polaris Ranger EV (2010–2024)
Corey F.
Was a slight hick up with the darn computer bot

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

Fleet Lithium 51 Volt Battery Bundle for Polaris Ranger EV (2010–2024)
76.8V 105Ah Fleet Lithium Battery — NexGen BMS
Anonymous
GREAT

GREAT SERVICE

76.8V 105Ah Fleet Lithium Battery — NexGen BMS
Fleet Lithium 51 Volt Battery Bundle for Polaris Ranger EV (2010–2024)
Randy E.
Awesome kit for cold weather climate

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!

Fleet Lithium 51 Volt Battery Bundle for Polaris Ranger EV (2010–2024)
12V DC Voltage Reducer — 30A
Carter A.
Solved inconsistent accessory voltage — 12V voltage reducer

The 12V voltage reducer corrected the unstable behavior that had affected the lights and other accessories. The output has remained steady through regular use.

12V DC Voltage Reducer — 30A
58.4V 18A On-board LiFePO4 Charger (CH5618)
Samantha S.
A practical spare or replacement — 51V replacement charger

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.

58.4V 18A On-board LiFePO4 Charger (CH5618)
Fleet Lithium 51 Volt Battery Bundle for Polaris Ranger EV (2010–2024)
Claire Z.
Clean fit for the Polaris Ranger EV bundle — Polaris Ranger EV bundle

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.

Fleet Lithium 51 Volt Battery Bundle for Polaris Ranger EV (2010–2024)
58.4V 18A On-board LiFePO4 Charger (CH5618)
Cooper X.
Dependable charging from the 51V replacement charger — 51V replacement charger

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.

58.4V 18A On-board LiFePO4 Charger (CH5618)
Lee L.
Easy installation and great technical support

Easy installation and great technical support.

Fleet Lithium - High Performance Lithium Batteries
Club Car Precedent / Tempo / DS (2008.5-2021) 48V Lithium Battery Conversion Kit — Fleet Lithium
Owen F.
Responsive performance after installation — Club Car 48V kit

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.

Club Car Precedent / Tempo / DS (2008.5-2021) 48V Lithium Battery Conversion Kit — Fleet Lithium
4 AWG Battery Cable Set (Pair)
Frank K.
Cabels look great

Cabels look great. Will be installing them by the end of the week. Frank

4 AWG Battery Cable Set (Pair)
BlueMax Marine 12V 195Ah LiFePO4 Deep Cycle Battery (Group 27)
Parker A.
Reliable marine power from the BlueMax 200Ah marine battery — BlueMax 200Ah marine battery

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.

BlueMax Marine 12V 195Ah LiFePO4 Deep Cycle Battery (Group 27)
Duplicate - EZGO TXT (2010-2021) (48V) Fleet Lithium Conversion Kit
Erica X.
Straightforward upgrade with the EZGO TXT kit — EZGO TXT kit

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.

Duplicate - EZGO TXT (2010-2021) (48V) Fleet Lithium Conversion Kit

About Fleet Lithium

Built for demanding applications. Ready for everyday use.

Fleet Lithium develops high-output LiFePO4 battery systems for golf carts, LSVs, UTVs, marine, RV, and off-grid applications. We combine serious power capability with application-specific fitment, complete conversion components, and direct technical support.

Find My Battery Talk to Our Team

Why Fleet is in our name

Fleet Lithium was built around equipment that gets used hard and cannot afford unreliable power.

Fleet Lithium was built around equipment that gets used hard and cannot afford unreliable power. Government fleets, rental operators, farms, hunting properties, and utility vehicles were our proving ground—not the modified-cart trend.

Those demanding applications shaped our approach from the beginning: build batteries with the power, control, and durability required for heavy daily use. That same overbuilt approach now serves individual golf cart, LSV, UTV, boat, RV, and off-grid customers who simply want a system they can depend on.

More than a battery in a box

A successful lithium conversion takes more than matching voltage and amp-hours.

Battery output, controller demand, charger programming, mounting, cabling, vehicle electronics, and communication protocols all have to work together. Fleet Lithium develops complete systems around the application so customers and installers do not have to piece together a conversion and hope the components are compatible.

Depending on the application, a Fleet Lithium solution may include the battery, matched charger, mounting hardware, cables, gauge or display integration, programming, installation guidance, and direct technical support.

Power and control built into the system

Fleet Lithium’s current NexGen battery management platform is rated for 300 amps of continuous discharge and up to 800 amps of peak output. It is designed to support real controller demand without treating every short power surge as an overload.

Select Fleet Lithium systems also support features such as OEM CAN-bus integration, cold-weather charging automation, Bluetooth monitoring, and GPS or geofencing for fleet security and operational control. These capabilities are application-dependent—not included with every battery.

  • 300A continuous / 800A peak surge discharge
  • OEM CAN-bus integration on select systems
  • Cold-weather charging, Bluetooth, GPS/geofencing where applicable

The application matters as much as the voltage

Two vehicles can use the same nominal voltage and still require completely different batteries, mounting solutions, chargers, cables, programming, or controller considerations.

Fleet Lithium researches vehicle generations, battery compartments, electrical architecture, controller demand, and charging requirements to develop application-specific configurations. Where fitment or installation requirements are verified, we document them clearly. Where additional validation is still required, we do not present an assumption as a confirmed fit.

Support and Warranty

Support from people who understand the entire system

Our support does not stop at the battery terminals. We help customers work through the battery, BMS, charger, controller, vehicle wiring, programming, and installation as one connected system.

Customers have direct access to technical support, product specifications, installation information, troubleshooting resources, warranty registration, and claims assistance.

Fleet Lithium Promise Series packs are backed by a 10-year warranty.

Visit the Support Center
10 Year Promise Series warranty
USA Technical support

Built for the way you actually use it

Whether you manage a working fleet, operate equipment on a farm, hunt remote property, commute in an LSV, cruise in a golf cart, spend the day on the water, or need dependable off-grid power, Fleet Lithium is built around the application—not just the battery specification.

Find the Right Battery Contact Fleet Lithium