Bad Boy 1500E MTV 48V Lithium Conversion Kit | Fleet Lithium
Bad Boy 1500E MTV 48V Lithium Conversion Kit | Fleet Lithium - 51V 105Ah Backordered — estimated to ship Sep 15
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
Bad Boy 1500E MTV 48V Lithium Conversion Kit | Fleet Lithium
Drop-In Lithium Power for Your Bad Boy 1500E MTV
The Bad Boy 1500E MTV 4x4 was built as a heavy-duty utility machine — but its factory lead-acid battery pack was always the weak link. This complete 48V lithium conversion kit replaces the entire flooded battery bank with a modern LiFePO4 power system engineered specifically for the 1500E MTV chassis, tray layout, and original drivetrain.
Delivering cleaner torque, dramatically longer range, faster charging, and true maintenance-free operation, this is a complete conversion solution — not a universal battery with generic hardware. Every component is selected for this exact vehicle.
Designed to work with the original DC motor and drivetrain, this is a true bolt-in upgrade requiring no fabrication, welding, or guesswork.
Choose Your Range
| Capacity | Energy (kWh) | Estimated Range | Best For |
|---|---|---|---|
| 51V 105Ah | 5.38 kWh | Up to 45 miles* | Daily property work & utility use |
| 51V 168Ah | 8.60 kWh | Up to 75 miles* | Extended range, hunting, ranch |
| 51V 210Ah (Dual 105Ah) | 10.75 kWh | Up to 90 miles* | Maximum range, commercial duty |
*Range varies with terrain, load, and driving style.
Cold-Weather Charging Protection — Standard on Every Pack
Every Fleet Lithium battery includes a built-in heater that activates automatically when charging below 32°F (0°C). This protects the cells during cold-weather charging — no extra charge, unlike competitors who charge $200–$400 for heated versions.
What's Included
- 51V NexGen Fleet Lithium LiFePO4 Battery (your selected capacity)
- CH5618 — 58.4V 18A LiFePO4 Smart Charger
- BR5204 — Vehicle-specific mounting bracket kit
- AC0219 — AC Power Connector
- CB0917 — 4 AWG Heavy-Gauge Battery Cable Set
- VR4812 — 48V to 12V Voltage Reducer (for lights & accessories)
- Digital State-of-Charge (SOC) Gauge
- All mounting hardware — complete bolt-in installation
Simple Installation
- Designed for the 1500E MTV with the original DC motor
- No welding or frame modification
- No controller programming required (stock drivetrain retained)
- Controller requirement: 350A or higher continuous rating
- Bolt-in installation using existing tray
- Universal joint brace included for secure fitment
- Typical install time: 1.5–2 hours
Detailed Specifications
| Specification | Detail |
|---|---|
| Vehicle Fitment | Bad Boy 1500E MTV 4x4 (All Years) |
| System Voltage | 48V (51.2V nominal LiFePO4) |
| Motor Compatibility | Original DC Motor |
| Controller Requirement | 350A+ continuous rating |
| Chemistry | LiFePO4 (Lithium Iron Phosphate) |
| Cycle Life | 5,000+ cycles at 80% DoD |
| Charging Time | Approx. 4–6 hours |
| Heating System | Built-in automatic low-temp charging protection |
| Weight Reduction | Over 300 lbs vs. factory lead-acid bank |
| Maintenance | Zero watering, zero corrosion |
| Warranty | 10-Year Fleet Lithium Warranty |
Why Fleet Lithium?
- ✔ 300A NexGen BMS — 800A peak surge for steep terrain and heavy loads
- ✔ Patent-Pending Fire Suppression — stops thermal runaway before it starts
- ✔ Bluetooth Monitoring — check health, voltage, temp from your phone
- ✔ 10-Year Warranty — industry-leading coverage
- ✔ Designed & Assembled in the USA
- ✔ True Drop-In — no rewiring, no reprogramming
Fitment
| Model | Years | Factory Voltage | Compatible |
|---|---|---|---|
| Bad Boy 1500E MTV 4x4 | All Years | 48V | Yes |
This kit uses the vehicle-specific BR5204 bracket kit and is fully compatible with the factory DC motor and controller. No upgrades or reprogramming needed.
FAQ
Will this fit my Bad Boy 1500E MTV? Yes — this kit was engineered specifically for the 1500E MTV chassis and tray layout (all model years) using the included BR5204 bracket system.
Is this compatible with the original motor? Yes. It is designed to work with the factory DC motor and stock drivetrain.
Do I need to upgrade my controller? Your controller must be rated at 350A continuous or higher. Most factory configurations meet this requirement. If unsure, contact us before ordering.
How long does installation take? Approximately 1.5–2 hours with basic tools.
Will my lights and accessories still work? Yes. The included VR4812 voltage reducer powers all 12V factory systems.
Can I use it for commercial or property maintenance work? Absolutely. The 1500E MTV was built as a utility machine — this kit restores full capability with modern lithium performance.
What's in the Box
- LiFePO4 battery (selected capacity)
- Smart lithium charger
- Vehicle-specific bracket kit (BR5204)
- 4 AWG cable set (CB0917)
- AC charging connector (AC0219)
- Voltage reducer (VR4812)
- Digital SOC gauge
- Complete mounting hardware
Restore the capability your 1500E MTV was built for. Upgrade to lithium and experience stronger torque, dramatically longer range, faster charging, and true maintenance-free ownership. Ships from the USA — shipping calculated at checkout.
Quick answer: the Bad Boy 1500E MTV 48V Lithium 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)
Dimensions & Weight
- Weight
- 120.0 lb
Fitment & Compatibility
- Make
- Model
- Motor Controller
- Applications
Warranty & Compliance
- Warranty
- Certifications & Standards
- UL 1642, UL 1973, CE, RoHS, UN 38.3, IP67
- Condition
- Manufacturer Relationship
Product Details
- Classification
- Vendor
- Fleet Lithium
- Product Type
- Lithium Battery Conversion Kit
- SKU
- FLBB1500E-51105
Let customers speak for us
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.
The 76V replacement charger replaced the previous unit without requiring a complicated setup. Charging has been predictable, and the connector fits securely.
The plug on the 51V replacement charger seats firmly and the unit maintains a normal charging cycle. The battery has been ready for use each time charging is complete.
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.
