51V 105Ah Fleet Lithium Battery — NexGen BMS
51V 105Ah Fleet Lithium Battery — NexGen BMSis backordered and will ship as soon as it is back in stock.
51V 105Ah Fleet Lithium Battery — NexGen BMS
51V 105Ah Fleet Lithium Battery — NexGen BMS
Drop-in 51.2V LiFePO4 replacement for tired 48V lead-acid banks. 5,376Wh of fade-free energy, half the weight of lead, and zero maintenance. Monitor state of charge, voltage, and cycle count via Bluetooth. Patent-pending fire suppression and a 300A NexGen BMS keep you running through every shift, round, and run.
What This Upgrade Fixes
- Eliminates voltage sag and sluggish performance common in aging lead-acid setups
- Cures range anxiety with consistent, fade-free power down to the last drop of capacity
- Removes hundreds of pounds of dead weight, improving acceleration, handling, and braking
- Ends the hassle of terminal corrosion, acid leaks, and seasonal battery watering
What's Included
1× 51.2V 105Ah Fleet Lithium Battery. Standalone bare battery unit. A 58.4V lithium charger, custom wiring, and mounting brackets are not included — see our Bundle and Conversion Kit listings for complete drop-in packages.
Compatibility
Universal 51.2V power unit engineered as a one-for-one replacement for 48V lead-acid battery banks. Drops directly into 48V golf carts, LSVs, UTVs, deep-cycle marine applications, and off-grid solar banks running factory 48V controllers — no reprogramming required for most vehicles.
Key Specs
- Chemistry: LiFePO4
- Nominal Voltage: 51.2V
- Capacity: 105Ah (5,376 Wh / 5.38 kWh)
- Cell Configuration: 16S1P
- Working Voltage: 43.2V – 58.4V
- Charging Voltage: 58.4V
- BMS Voltage Cutoff: 43.2V
- Recommended Low Voltage Disconnect: 49.0V
- 300A NexGen BMS with 800A peak surge
- Cycle Life: 5,000+ cycles at 80% DoD
- Weight: ~104 lbs (47.3 kg)
- Dimensions: 14.3" × 12.24" × 10.94"
- Enclosure: Cold rolled steel, IP65
- Operating Temp (Discharge): -20°C to 55°C (-4°F to 131°F)
- Operating Temp (Charge): 0°C to 55°C (32°F to 131°F) — heater activates below 32°F
- Communication: Bluetooth, GPS, RS485, UART, CAN
Frequently Asked Questions
Does this battery include a charger?
No — this listing is the bare battery only. You'll need a matched 58.4V LiFePO4 charger to run it.
- Best value: Grab the 51V 105Ah Fleet Lithium Bundle — battery + CH5618 58.4V 18A smart charger + cable set + AC connector + digital state-of-charge gauge. Everything for a complete drop-in.
- Charger only: Add the CH5618 58.4V 18A Smart Charger alongside this battery.
Will this work in severe cold climates?
Yes. The NexGen BMS automatically activates internal heating below 32°F so the pack charges safely year-round.
How long will this battery actually last?
Engineered for over a decade of reliable performance and backed by our 10-year warranty.
Can I integrate this with a sophisticated motor controller?
Yes. The integrated BMS provides CANBUS and RS485 ports for advanced motor controllers and telemetry systems.
Is there a vehicle-specific kit with brackets?
Yes. If you're converting a specific golf cart (EZGO, Club Car, Yamaha, Advanced EV, etc.), our 48V Conversion Kits include this exact battery plus a model-specific bracket, charger, and all wiring — no fabrication required.
Quick answer: the 51V 105Ah Fleet Lithium Battery — NexGen BMS 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
- 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) , Active Cell Balancing for Extended Life Cycle
- CAN Bus Enabled
- Yes
- Safety Features
- Low Temp Charging Cutoff , Over Charge / Discharge Protection , Over Current Protection , Low Voltage Disconnect (LVD)
- Battery Features
- EV Battery Features
- Operating Temperature
- Charging: 0°C to 45°C (32°F to 113°F) , Discharging: -20°C to 60°C (-4°F to 140°F)
Dimensions & Weight
- Dimensions (L x W x H)
- Length
- Width
- Height
- Weight
- 104.3 lb
Fitment & Compatibility
- Make
- Model
- Model Number
Warranty & Compliance
- Warranty
- Certifications & Standards
- UL 1642, UL 1973, CE, RoHS, UN 38.3, IP65, MSDS
- Condition
- Manufacturer Relationship
Product Details
- Classification
- Colour / Finish
- Vendor
- Fleet Lithium
- Product Type
- Individual Batteries
- SKU
- FLSGPS-51105-GPS
Let customers speak for us
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.
The 76V replacement charger replaced the previous unit without requiring a complicated setup. Charging has been predictable, and the connector fits securely.
