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When your lifestyle depends on reliable energy, you need a battery that does more than just store power you need one that thinks, adapts, and performs in real-world conditions. The BigBattery 12V HUSKY 2 INV Lithium Battery 5.12kWh 400Ah is engineered for serious users who demand dependable energy for RV travel, marine systems, van builds, and small off-grid homes.
With a massive 5.12kWh capacity and 400Ah of usable energy, this deep-cycle lithium battery keeps your essential systems running longer without compromise. Whether you're powering appliances on the road, running electronics on the water, or maintaining a steady backup at home, this system is built to handle it all with ease.
What sets this INV version apart is its inverter communication capability, allowing seamless integration with compatible inverter systems like Victron and AIMS. This means smarter energy flow, optimized charging, and better system efficiency—so you get more out of every watt stored.
Built using Tier 1 LiFePO₄ cells, the HUSKY 2 delivers consistent performance, longer lifespan, and superior safety compared to traditional lead-acid batteries. Add in zero maintenance, and you’re looking at a solution that saves you time, effort, and long-term costs.
With 5.12kWh and 400Ah capacity, this battery supports extended runtimes for appliances, tools, and essential systems. Perfect for RV living, off-grid cabins, and backup setups where consistent energy availability is critical every day.
The INV version connects directly with compatible inverter systems, enabling closed-loop communication. This allows optimized charging, improved efficiency, and better energy management for solar and inverter-based setups in mobile or stationary applications.
Built with premium lithium iron phosphate cells, this battery provides stable power output, longer cycle life, and enhanced safety. Compared to lead-acid options, it lasts significantly longer while maintaining consistent performance over time.
The integrated BMS safeguards against overcharging, over-discharging, short circuits, and temperature extremes. This ensures safe operation in demanding conditions, giving you peace of mind whether you're on the road or off the grid.
Designed for real-world environments, the rugged enclosure protects against dust and water exposure. This makes it ideal for marine systems, vans, and outdoor installations where durability is essential for long-term performance.
The built-in self-heating function allows the battery to perform reliably in low temperatures. This feature is especially useful for winter camping, high-altitude travel, or off-grid setups in colder climates.
Engineered to withstand constant movement and vibration, this battery performs consistently in RVs, boats, and mobile work vehicles. It stays stable even on rough roads or choppy waters.
With HUSKY app connectivity, you can monitor battery status, performance, and health remotely. This gives you full visibility and control over your energy system, helping you make smarter decisions in real time.
BigBattery provides a 12-year warranty policy, ensuring the absence of defects in materials, workmanship, and performance during the warranty period.
BigBattery 12V HUSKY 2 INV Lithium Battery 5.12kWh 400Ah Specifications
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|---|---|
| System Voltage | 12V |
| Nominal Voltage | 12.8V |
| Chemistry | LiFePO4 |
| kWh Capacity | 5.12 kWh |
| Ah Capacity | 400Ah |
| Charging Voltage Range | 13.9V – 14V |
| Max Charge Voltage | 14.4V |
| Operating Voltage Range | 12V – 14.4V |
| Suggested Low Voltage Cutoff | 12V – 12.7V |
| BMS Cutoff Range | 10.5V – 11.75V |
| Cell Configuration | 4S |
| Max Continuous Discharge Current | 300A |
| Max Continuous Power | 5120W |
| Max Discharge Peak Current | 350A (Max 5 seconds) |
| Max Charge Current | 200A |
| Charge Temperature Range | -4°F – 113°F (-20°C – 45°C) |
| Discharge Temperature Range | -4°F – 131°F (-20°C – 55°C) |
| Optimal Discharge Temperature Range | 59°F – 95°F (15°C – 35°C) |
| Storage Temperature Range | -4°F – 113°F (-20°C – 45°C) (Max 6 months) |
| Weight | 95 lb (43.1 kg) |
| Depth | 12.6 in (320 mm) |
| Width | 18.1 in (460 mm) |
| Height | 9.8 in (249 mm) |
| Max Connections | Up to 16 Parallel |
| Protection Rating | IP65 / NEMA 4X |
| Communications | CANBus / RS485 |
| Self-Heating | Yes |
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