Big Battery | 12V 4X HUSKY 2 KIT
12V 4X HUSKY 2 KIT – 20.48kWh LiFePO4 Battery System for RVs, Marine & Off-Grid Power
Unleash next-level power with the 12V 4X HUSKY 2 KIT—BigBattery’s most advanced 12V LiFePO4 battery solution, delivering a massive 20.48kWh of reliable, long-lasting energy. Designed for RVs, camper vans, marine vessels, trolling motors, and off-grid solar systems, this kit provides unmatched capacity, performance, and safety.
Engineered for Heavy-Duty Applications
Each battery in the 12V 4X HUSKY 2 KIT features Tier 1 lithium iron phosphate (LiFePO4) cells known for their exceptional cycle life, thermal stability, and energy density. Built with a rugged IP65-rated enclosure, this kit stands strong against the elements—perfect for mobile, outdoor, and marine environments.
Whether you're facing freezing temperatures or blazing heat, the self-heating system ensures your power stays consistent, while the auto-balancing BMS, CANBus, and RS485 communication protocols provide intelligent monitoring and safety management across all units.
Key Specifications:
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Energy Storage: 20.48kWh (4 x 5.12kWh HUSKY 2 Batteries)
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System Voltage: 12V
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Battery Chemistry: Tier 1 LiFePO4
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Advanced BMS: Auto-balancing, over/under-voltage, temperature & short circuit protection
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Communications: RS485 & CANBus Compatible
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Self-Heating Function: Reliable winter performance
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Casing: Industrial-grade IP65 enclosure
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Installation: Plug-and-play with all cables included
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Maintenance: 100% maintenance-free
Perfect For:
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RV and Camper Van Power Systems
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Marine Applications (Yachts, Trolling Motors, Sailboats)
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12V Off-Grid Solar Battery Banks
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Emergency Backup and Mobile Power Stations
What's Included
4 × 12V HUSKY 2 - LiFePO4 - 400Ah - 5.12kWh
3 × 4AWG (Black and Red) 21 inches Ring to Ring Terminal Cable
Specs and Downloads
Single Battery 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 |
Are Solar Guys Pro Authorized Retailers?
Yes! We are proud to be one of the few online retailers who are authorized retailers for every single product we carry!
Being an authorized retailer means we carry the same warranty as the manufacturer, protecting your purchase!
When Will My Order Ship?
Most orders ship within 1–3 business days. You’ll get a tracking number as soon as it ships via email!
Do We Accept Returns?
Yes absolutely, we have a no-hassle, 30-day return policy on all items! To refer to the full policy, click HERE
Are Products Brand New?
Yes! By default, all products on Solar Guys Pro are 100% brand-new and in perfect condition.
If an item is used or refurbished, it will clearly indicate so in the title of the product as well as the discription.
For example, a used Battery will say:
XYZ Battery | 48V 100AH (REFURBISHED)
If you'd like to confirm, you can always send us a email at info@solarguyspro.com
Orders over $500 include a FREE (Normally $149.99) 80-Page DIY Solar eBook — added automatically at checkout.
Frequently Asked Questions
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