72V ELECTRIC UTV INSTALLATION SERIES
Updated October 10, 2026 · Manual Revision 2.3 · Fleet Lithium
Replace the lead-acid bank in your compatible 72V Tracker EV, Textron Prowler EV or Bad Boy Recoil with one Fleet Lithium battery. Compare 105Ah and 168Ah kits, see the battery features and warranty, and follow the real Prowler installation photos with the free owner manual.
Can a Tracker EV, Prowler EV or Recoil be converted to lithium?
Yes. Compatible factory 72V lead-acid models can use a matched Fleet 76.8V lithium conversion kit. The complete system includes the correct battery capacity, restraint, cables, lithium charger, AC inlet and battery gauge. Match your actual tray, controller and 12V accessories before removing the old bank.
What you gain with Fleet Lithium
Spend less time watering batteries and more time using your UTV. The current NexGen conversion battery brings its monitoring and protection into one pack:
- 300A continuous / 800A peak output: NexGen battery management for high-current loads.
- Bluetooth monitoring and a dash gauge: see remaining charge, battery temperature and diagnostic information.
- Automatic cold-charge heating: the heater warms cold cells before normal charging begins.
- Integrated fire suppression: an additional protection system inside the battery.
- No lead-acid watering or equalization: routine care focuses on secure mounting, wiring and sensible charging.
10-YEAR WARRANTY
Power you can Trust
Your Fleet Lithium battery is backed by a 10-year warranty and USA-based support. Choose your capacity, install with confidence and get back to using your UTV.
One electrical family, different installation details
These names cover more than one tray, suspension and braking configuration. Read your model/serial label and photograph the controller and complete battery bank. A Recoil badge, a Prowler body or a model year alone is not enough to select the wiring route.
| Vehicle | What to check |
|---|---|
| Tracker EV / EV iS | Factory 72V system, controller/braking arrangement and capacity-specific restraint. The 168Ah option uses the larger-pack bracket kit. |
| Textron Prowler EV / EV iS | The photo walkthrough shows a 105Ah installation with the original lead-acid bank, rear controller access and a round factory gauge opening. |
| Bad Boy Recoil / Recoil iS | Use the Recoil restraint specified on your order. Early OEM Recoil iS documentation shows nine 8V batteries; do not assume the six-12V Prowler layout. |
Check the voltage first: this is not the procedure for a gas Prowler, hybrid Ambush, 48V Bad Boy or 48V Polaris Ranger EV. For Recoil Crew, Instinct or a modified vehicle, send Fleet the serial label, tray and controller details before selecting the kit.
105Ah or 168Ah: choose reserve, then confirm fit
A lithium conversion removes the battery-watering and lead-acid equalization routine. A dedicated battery charge (SOC) gauge helps you see the battery’s remaining charge. Choose capacity for how you use the vehicle—property work, hunting access, hills, passengers and trip length.
| Fleet option | Nominal energy | Installation planning |
|---|---|---|
| 76.8V 105Ah | 8.06 kWh | Uses the factory tray on matched Tracker/Prowler applications. Still requires proper restraint. |
| 76.8V 168Ah | 12.90 kWh | More energy reserve; match the larger battery to its supplied mounting kit. |
Nominal energy is voltage × amp-hours. It is not a promised driving range. Load, terrain, tires, temperature and driving style affect range; OEM payload and towing ratings stay the same.
A Prowler EV installation, shown in real photos
The photographs below come from the actual 105Ah Fleet Lithium conversion. Revision 2.3 turns the removal, controller connection and dash-gauge work into numbered procedures. Keep the PDF beside the vehicle; it includes the cable-identification table, annotated battery ports and a fillable installation record.
The photos show the Prowler installation. Use the separate mounting instructions supplied for your 168Ah pack or Recoil restraint rather than copying the photographed 105Ah fastener locations.
What the installation involves
1. Label the wiring and remove the old battery bank
Photograph the complete bank and every connection. Label the main positive cable that runs to the solenoid and the main negative cable that runs to the controller. Separate the charger wires, vehicle feeds from the two ends of the bank, and any 12V taps from one battery. A small wire can carry the full battery voltage.
Park on level ground, key OFF, parking brake set and wheels chocked. Unplug the old charger. Follow the isolation procedure in the manual, disconnecting bank negative first, then positive and any separate accessory taps. Remove the short battery-to-battery cables and hold-downs, cover terminals and lift each battery upright with a carrier or suitable equipment. Clean and inspect the empty tray before fitting lithium. Do not remove sound structural supports.
2. Fit the restraint for your capacity and vehicle
The photographed 105Ah Prowler battery sits on the factory supports and has mounting holes in its external bottom flange. Trial fit the case, line up its mounting holes with sound supports and check seat clearance. If support holes are required, mark them, lift the battery back out, check below for wiring and brake lines, then drill and remove all shavings before refitting the battery.
The 168Ah option uses its separate bracket kit; Recoil uses the restraint specified on your order, including BR4211 when supplied. Follow those fitting instructions rather than copying the 105Ah Prowler hole positions. Never drill the battery enclosure. Fasten the pack so it cannot slide, lift or rock.
3. Connect the main battery cables
With the vehicle isolated, remove the four 14 mm rear-cover bolts on the photographed Prowler. Follow the old negative cable to controller B-. Its 13 mm fastener holds the battery cable and a second cable linking the controllers. Replace only the battery cable, reinstall the controller link on the same terminal and restore the insulating boot.
Follow the old main positive to the solenoid, the heavy-duty relay that switches motor power. Install the replacement cable on the same large terminal, leaving the other wires in place. Do not move it to the other large terminal or a small control terminal. Route both new battery leads clear of moving parts and sharp edges; leave the battery ends disconnected until the charger, gauge and accessory wiring are ready.
For the final battery connections, keep the key OFF, AC unplugged and battery OFF. Connect the correctly labeled positive leads to B+ first, then the negative leads to B-. Seat clean ring terminals flat and use the torque supplied for your battery model. Fit terminal covers and secure every cable before power-up.
4. Install the lithium charger and AC inlet
Wall outlet → AC inlet → lithium charger → battery. CH8713 is the kit's 87.6V / 13A lithium charger; AC0219 is the body-mounted AC inlet. The old off-board charger's vehicle receptacle is a different connection.
Disconnect the old charger power leads and remove the unused charging power harness where separate, keeping shared vehicle wires and any charge-port control connector intact. Secure the new charger in the battery bay with its vents clear. Check behind the panel before cutting the AC inlet opening. Connect the inlet to the charger AC input; route charger DC positive to battery B+ and negative to B-.
Some versions detect the old charger plug to prevent driving while plugged in. A new AC inlet does not automatically operate that charging interlock. If the old receptacle has an extra control connector, keep it labeled and follow the conversion instructions for that vehicle. Do not join unidentified wires to make it drive. Have a fitted interlock checked using the model's service procedure, and always unplug and stow the cord before driving.
5. Replace the Prowler dash gauge in the factory opening
With power isolated, remove the two upper T30 dash screws on the filmed Prowler, gently release the panel tabs and support the panel. Unplug the old gauge, depress its upper/lower retaining tabs and push it out through the front. This vehicle accepts the Fleet gauge in the existing round opening.
Fit the new gauge from the front and tighten its rear bracket evenly. Route the supplied cable to the battery DISPLAY port, clear of steering, pedals and sharp edges. Keep the battery OFF while refitting the dash. Check the gauge during the first power-up after the complete wiring inspection; do not connect the new gauge to the old lead-acid gauge wires.
6. Inspect, charge and test the complete vehicle
Confirm that the battery cannot move, the seat clears the wiring, every cable is correctly connected and tightened, and covers, fuses and guards are fitted. With the charger unplugged, wheels chocked and parking brake set, turn the battery ON, return a fitted service switch to RUN and use the vehicle's neutral/key-on position. The new gauge should show charge remaining without a battery or controller fault.
For the first charge, key OFF and battery ON. Use a suitable grounded outlet and allow a full charge; in cold conditions, the automatic heater may warm the cells first. Unplug and stow the cord before driving. On level ground, test forward, reverse and the brake pedal at walking speed, then the parking brake. Stop for a fault, abnormal heat or unexpected braking. Recheck the mounts and cables after the short drive.
Keep 12V accessories and winches on the right supply
Never connect a 12V accessory or winch directly to the 76.8V main battery. An old tap from one lead-acid battery must be replaced with a correctly rated supply. A reducer must accept the 87.6V full-charge voltage and supply the connected load through the specified protection.
The current Recoil bundle lists a 12V reducer; the Tracker/Prowler bundle does not. Winches can demand far more current than lights and USB outlets. Use a converter rated for the actual winch, including peak demand, or a secured auxiliary 12V battery with a suitable charging system. A standard accessory reducer is not automatically a winch supply.
KEEP IT WITH YOUR UTV
Your illustrated installation manual
Model and capacity differences, real installation photos, original wiring diagrams, charger and gauge fitting, 12V accessories, initial testing and a fillable installation record.
Revision 2.3 · 12 pages · PDF
Tracker, Prowler and Recoil conversion FAQs
Can I convert a Tracker EV, Prowler EV or Recoil iS to lithium?
Yes, compatible factory 72V lead-acid electric versions can use a matched Fleet 76.8V nominal lithium system. Confirm the model/serial label, controller, tray and supplied restraint. This guide does not cover gas Prowlers, hybrid Ambush models or 48V Bad Boy and Polaris Ranger EV systems.
Why does a 72V vehicle use a 76.8V lithium battery?
72V describes the original lead-acid system class. The matched Fleet lithium pack is 76.8V nominal and uses an 87.6V lithium charger. Battery chemistry changes the nominal voltage; this is not permission to install the pack in a 48V vehicle.
Should I choose 105Ah or 168Ah?
105Ah provides about 8.06 kWh nominal energy; 168Ah provides about 12.90 kWh. Choose reserve for your terrain, load and trip length, then confirm fit. On matched Tracker/Prowler models, 105Ah uses the factory tray while 168Ah uses the separate larger-pack bracket. Recoil uses its model-specific restraint.
Does every Recoil have six 12V batteries?
No. Early OEM Recoil iS documentation specifies nine 8V batteries, while the Prowler example uses a different layout. Both are 72V systems. Identify your actual bank and complete-pack terminals instead of copying another model’s cable positions.
Do I need to replace the main solenoid or both controllers?
A compatible, serviceable contactor and stock controllers are not automatically replaced. The filmed installation replaces the battery-to-controller negative cable and battery-to-contactor positive cable, retaining the cable linking the two controllers and existing control circuits. Confirm modified systems with Fleet before installation.
How are the charger and gauge connected?
The AC inlet supplies the CH8713 lithium charger, rated 87.6V / 13A. Charger DC positive goes to B+ and negative to B-. Connect the Fleet gauge with its supplied cable to DISPLAY. Keep the battery OFF during installation. If the old charge port has an extra control connector, follow the vehicle-specific interlock instructions; the new AC inlet does not automatically operate it.
Can I reuse the factory gauge opening?
The photographed Prowler accepts the Fleet gauge in its original round opening. Its dash uses two upper T30 screws; the replacement gauge secures with its rear bracket and two nuts. Other vehicles may differ. Confirm the supplied gauge mount or actual cutout dimensions before drilling, and check behind the panel.
Is a 12V reducer included, and will it run my winch?
The current Recoil bundle lists a 12V reducer; the Tracker/Prowler bundle does not. A standard accessory reducer is not automatically suitable for a winch. Match converter input to the 87.6V full-charge voltage and output to the actual load, including winch peak demand. Never connect a 12V winch directly to the main battery.
Can I keep my old lead-acid charger?
Use the Fleet lithium charger supplied for this battery. Remove the old charger power connection as directed in the manual. Keep any separate charge-port control connector identified and follow the vehicle-specific instructions. Always unplug and stow the charging cord before driving.
Does this conversion increase my payload or towing limit?
No. Retain the OEM payload, towing, tire and terrain limits. Range varies with use, and reduced battery weight does not change the published vehicle ratings.
Can I install the conversion myself?
This guide is written for the owner. The work requires safe removal of the lead-acid bank, identification of the complete-pack circuits, secure mounting, correct high-current cable connections and charger and charging safety-lockout checks. Use a qualified installer if you cannot identify or isolate a circuit. Photograph your original wiring and read the complete manual before starting.
How long does a lithium conversion take?
Installation time depends on the vehicle, battery-bank layout, corrosion, mounting kit and accessory wiring. Plan for battery removal, tray inspection, mounting, main cables, charger, gauge and final testing. A larger 168Ah pack or a damaged tray can require different preparation; do not schedule the job from a generic bolt-in time estimate.
What warranty comes with the conversion battery?
Your Fleet Lithium EV battery is backed by a 10-year warranty and USA-based support. View warranty details and registration.
Does the Fleet battery have a heater and Bluetooth?
Current NexGen conversion batteries include automatic cold-charge heating and Bluetooth monitoring. The heater warms cold cells before normal charging begins. Use the dash gauge for remaining charge and the phone app for battery data and faults; leave advanced protection settings unchanged.
Get the right Fleet system for your UTV
Start with the vehicle, choose your reserve and match the complete installation. Fleet can help confirm the kit before you take the old bank out.
