Big Wei 12V 280Ah 3584WH LiFePO4 Battery - AUS Made P12280S

Big Wei 12V 280AH Lithium LiFePO4 Battery Model P12280S - AUS Made with Optional Bluetooth Connectivity

Built for demanding environments, this large capacity 12V Lithium deep cycle battery has enough capacity to keep your adventures or small off grid setup running for ages!
Our BWB LiFePO4 batteries feature A-Grade GFB prismatic cells and a reliable JBD BMS. Each cell is cushioned with double-coated 3M foam tape for shock absorption, secured with fibreglass tape, and insulated using high-quality epoxy resin boards. Additional foam padding on the sides and base helps protect against vibration and heat — making these batteries ideal for 4WD, marine, and off-road applications

Main Features:

Lifetime free service
Up to 8000 life cycles
JBD BMS smart protection
Bluetooth option available
Can be connected in parallel up to 4
100% Brand new A-grade Prismatic GFB cells
MAX. 100A continuous charge/discharge current

Quick Specs:

• BWB LiFePO4 Model No.: P12280S
  
• Nominal Voltage: 12.8V
  
• Rated Capacity: 280Ah
  
• Usable Capacity: 90%
  
• Max. Charge Voltage: 14.6V
  
• Max. Continuous Charge Current: 250A
  
• Max. Continuous Discharge Current: 250A
  
• Operating Temperature: 0-55℃
  
• Cut-off Voltage: 10V
  
• Warranty:  5 years (Lifetime Free Service)
  
• Weight: 26.2 kg
  
• Dimensions: 34 x 18.5 x 28 cm
  

Why Chose LiFePO4 Batteries?

Longer Lifespan
Up to 3,000–5,000+ cycles (compared to 500–1,000 for lead-acid).
Can easily last 10+ years with proper care.
More cycles = better return on investment.

Deep Discharge Capable
Can regularly discharge to 80–90% Depth of Discharge (DoD) without damage.
Lead-acid prefers only 50% DoD for longevity.

Higher Efficiency
Charge/discharge efficiency around 95–98% (vs. ~80–85% for lead-acid).
More of your solar power is usable.

Lightweight & Compact
About 1/3 the weight of equivalent lead-acid batteries.
Easier to transport, mount, and install.

Built-in Battery Management System (BMS)
Most LiFePO₄ batteries come with a BMS for overcharge, over-discharge, short circuit, and thermal protection.
Safer and smarter.

Stable Chemistry = Safer
Unlike other lithium chemistries, LiFePO₄ is thermally and chemically stable, reducing fire risk.
Ideal for residential, RV, and marine applications.

Low Maintenance
No need to water them like flooded lead acid.
Can sit idle with minimal self-discharge (~2–3% per month).

Better in Partial Charge States
No need for full charges to maintain health (unlike lead acid which can sulfate).
Perfect for solar, where full charging isn’t always guaranteed.

About The Brand:

BigWei has operating in Brisbane, Australia since 2017 and provides high-quality batteries for cars, trucks, automobiles, motorcycles, and boats/marine. Big Wei specialise in deep cycle batteries for solar power system needs and we are proudly producing their very own Lithium Iron Phosphate (LiFePo4) batteries.