12V HUSKY 2 – LiFePO4 – 400Ah – 5.12kWh Battery for RVs, Marine & Off-Grid Power
Meet the next generation in energy storage—the 12V HUSKY 2 – LiFePO4 – 400Ah – 5.12kWh from BigBattery, a high-output, long-lasting lithium battery engineered for serious power users on land or water. Perfect for RVs, camper vans, trolling motors, boats, and 12V solar setups, this battery delivers premium performance with unbeatable durability.
Powerful. Intelligent. Adventure-Ready.
The 12V HUSKY 2 – LiFePO4 – 400Ah – 5.12kWh is BigBattery’s most advanced 12V lithium battery to date, featuring Tier 1 LFP cells, 400Ah of capacity, and a smart BMS with auto-balancing for optimal safety and battery life. Built with a rugged, IP65-rated enclosure, this unit stands up to vibration, moisture, and dust—perfect for mobile and marine applications.
Thanks to its self-heating functionality, it performs reliably in cold weather, while CANBus and RS485 communication protocols provide full visibility and control of your power system in real time.
Key Specifications:
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Nominal Voltage: 12V
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Energy Capacity: 5.12kWh
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Amp-Hour Rating: 400Ah
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Cell Type: Tier 1 LiFePO4 (Lithium Iron Phosphate)
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Enclosure: IP65-rated, vibration-resistant, outdoor-ready
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Battery Management System: Advanced BMS with auto-balancing
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Cold Weather Feature: Integrated self-heating
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Communication: RS485 and CANBus compatible
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Cycle Life: 4000–7000+ cycles
Ideal For:
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RVs and Camper Van Energy Systems
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Trolling Motors & Marine Applications
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12V Off-Grid Solar Banks
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Mobile Power Stations and Emergency Backup
What's Included
- 1 x 12V HUSKY 2 LiFePO4 – 400Ah – 5.12kWh
- 2 × HUSKY 2 Carrying Handle
- 2 × L Mounting Bracket
- 2 × M8 Screws
- 1 × Red & Black Terminal Rubber Cover
- 1 × 2AWG 3FT Red & Black Ring to Ring Terminal Cables (CBL086)
Specs and Downloads
Tech Specs
| SKU: | FHSKY-12051-G2 |
| System Voltage: | 12V |
| Nominal Voltage: | 12.8V |
| Chemistry: | LiFePO4 |
| kWh Capacity: | 5.12kWh |
| 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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We provide certified gas with 99.9% minimum purity, preventing system contamination and ensuring optimal HVAC function.