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Ships within 48 hours · Estimated delivery Aug 29 - Sep 3
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Description
Star EV Sirius (All Years) (48V) Fleet Lithium Conversion KitUpgrade Your Star EV Sirius to Fleet Lithium Replace the factory lead acid batteries in your Star EV Sirius with a single, high performance 51V LiFePO4 pack from Fleet Lithium. Complete conversion kit battery, charger, bracket, cables, and all hardware included. Choose Your Capacity Capacity Range Best For 51V 105Ah Up to 50 mi Daily driving, golf 51V 168Ah Up to 75 mi All day use 51V 210Ah Up to 90 mi Max range, fleet use What's Included 51V NexGen
Upgrade Your Star EV Sirius to Fleet Lithium
Replace the factory lead-acid batteries in your Star EV Sirius with a single, high-performance 51V LiFePO4 pack from Fleet Lithium. Complete conversion kit — battery, charger, bracket, cables, and all hardware included.
Choose Your Capacity
| Capacity | Range | Best For |
|---|---|---|
| 51V 105Ah | Up to 50 mi | Daily driving, golf |
| 51V 168Ah | Up to 75 mi | All-day use |
| 51V 210Ah | Up to 90 mi | Max range, fleet use |
What's Included
- 51V NexGen Fleet Lithium LiFePO4 Battery (selected capacity)
- CH5618 — 58.4V 18A LiFePO4 Smart Charger
- BR7139 — Star EV Sirius Bracket Kit
- AC0219 — AC Power Connector
- CB0917 — 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 (standard, not an add-on)
- Bluetooth monitoring — voltage, temp, cycle count from your phone
- 10-year warranty — designed and assembled in the USA
Fitment Guide
| OEM | Model | Years | Factory Voltage |
|---|---|---|---|
| Star EV | Sirius 2 | All Years | 48V |
| Star EV | Sirius 2+2 | All Years | 48V |
Controller Compatibility
Star EV Sirius models use a factory Curtis 48V AC controller. The Fleet Lithium 51V pack is fully compatible — no reprogramming or controller changes required.
Will this fit my Star EV Sirius?
Yes. The BR7139 bracket kit provides a factory-fit installation for all Sirius models. No modifications required.
Does my controller need reprogramming?
No. The factory Curtis 48V AC controller on Sirius models accepts the 51V lithium pack without changes.
How long does installation take?
30–60 minutes with basic hand tools.
Does it work in cold weather?
Yes. Built-in heater activates automatically below 32°F — standard on every pack.
*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.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy