SK 12V 280Ah Heated Lithium Battery

SOK 12V 280Ah Heated LiFePO₄ Battery – Serious Capacity for Off-Grid, Backup & House Power Systems

The SOK SK12V280H is a workhorse. With 280Ah of usable capacity and a hefty 3584Wh of energy in a single 12V unit, this is the battery you reach for when you're powering a whole cabin, a serious backup system. Built-in heating pads handle the cold automatically, so charging keeps going through Central Otago winters, alpine sheds, and frosty Waikato mornings when other lithium batteries would sit there refusing to take a charge.

Inside you'll find genuine grade A 280Ah prismatic LiFePO₄ cells paired with SOK's own custom-designed BMS — not the generic off-the-shelf board you'll find in most competitor batteries. It handles 200A continuous discharge, 250A peak, and protects against over-charge, over-discharge, over-current, short circuit, and high or low temperature events. The aluminium case is built to take a beating, and the design is fully serviceable — pop the cover, swap a cell or the BMS, and keep going. Most lithium batteries on the market are sealed boxes you throw away when something fails; this one isn't.

SOK has been one of the most trusted names in the global off-grid community for years, with a reputation built on transparency, build quality, and batteries that actually do what the spec sheet says. 

Key Features

• 12V 280Ah / 3584Wh capacity
• Internal heating pads with automatic low-temperature charge protection
• Genuine Grade A Ganfeng prismatic LiFePO₄ cells
• SOK custom-designed Smart BMS with Bluetooth monitoring
• Max continuous discharge: 200A (250A peak)
• Recommended charge current: 56A (max 120A)
• 4000–8000 cycle life, maintenance-free
• Powder-coated aluminium enclosure with M8 terminals
• Detachable cover — user-serviceable BMS and cells
• Over-charge, over-discharge, over-current and short-circuit protection
• High and low temperature disconnects
• Parallel up to 10 units
• Certified to UL1973, UL9540A and IEC62619 (cells)

Why It's a Smarter Buy

• Serviceable design — replace the BMS or cells instead of binning the whole battery
• Built to last: 15+ year realistic lifespan when looked after
• Lightweight compared to lead-acid — easier to install and rack up
• Faster charging and 100% usable capacity vs AGM or gel
• No off-gassing, no voltage sag, no topping up
• Excellent thermal stability and very low self-discharge

Datasheet