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12V300Ah LiFePO4 Lithium Battery
The Ultimate Power Reservoir: Haineng Energy 12V 300Ah LiFePO4 Battery
When you need massive power without the massive weight of lead-acid, the Haineng Energy 12V 300Ah is the definitive solution. Offering a staggering 3.84kWh of usable energy, this battery is engineered for high-demand users in RVs, sailing yachts, and remote off-grid solar cabins.
Why Choose Haineng Energy for Your 300Ah Needs
Massive Capacity, Compact Footprint: A single 300Ah unit can power heavy appliances (microwaves, AC units, coffee makers) for days, replacing up to three large AGM batteries while saving over 60% in weight.
Extreme Durability: Built with premium LiFePO4 cells to provide 4,000 to 6,000+ deep cycles. This battery is an investment that lasts for over a decade.
Smart BMS Control: Our proprietary Smart BMS ensures safe operation by monitoring voltage, current, and temperature, preventing any risk of overcharging or short circuits.
Engineered for the Cold: We provide specialized schemes with internal heating systems for safe charging in temperatures down to -20°C, specifically designed for North American winters.
Technical Specifications
| Feature | Performance Detail |
| Nominal Voltage | 12.8V |
| Rated Capacity | 300Ah (3.84kWh Energy) |
| Cycle Life | 4,000 - 6,000+ Deep Cycles |
| Max Continuous Discharge | 150A - 200A (Supports high-power inverters) |
| Communication | Optional Bluetooth / NMEA2000 for marine use |
| Brand | Haineng Energy |
our team’s Custom Solution Center
Our sales and engineering team works directly with you, from cell selection to shipment. We specialize in converting complex energy needs into reliable technical schemes. Beyond deep cycle storage, I lead our team in designing specialized platforms for:
Professional Garden Tools: High-voltage 40V/80V battery packs for commercial mowers (like Allett) and power equipment.
Power Tool Replacements: High-rate 21700 cell configurations for brands like Makita, DeWalt, and Milwaukee, ensuring maximum torque.
Innovative Battery Tech: We support semi-solid state battery designs for projects requiring the highest energy density and safety.
Engineering Note:
"The 12V 300Ah is our most powerful deep-cycle unit. My goal is to 'lock in' a high-quality supply chain for your business, ensuring that every battery is custom-optimized for your specific application—from waterproof ratings to smart communication protocols. Let’s design your power future today!"
Related Products & Resources
- Deep Cycle LiFePO4 Batteries for RV & Marine — Browse the full category
- 12V 10Ah LiFePO4 Lithium Battery — Related product
- 12V 100Ah LiFePO4 Lithium Battery — Related product
- 12V50Ah LiFePO4 Lithium Battery — Related product
- Wholesale 12.8V 100Ah IP67 LiFePO4 RV Battery Manufacturer | Haineng Energy — Further reading
- 12V 100Ah LiFePO4 battery buying guide — Buyer guide
Need a custom specification, private label or OEM/ODM programme? Request a wholesale quotation — we reply within 24 hours.
