BigBattery 12V 4X HUSKY 2 Lithium Battery Kit – 20.48kWh LiFePO₄ Power for RVs, Boats & Off-Grid Systems
Experience the ultimate in 12V lithium power with the BigBattery 12V 4X HUSKY 2 Kit, delivering a massive 20.48kWh of clean, reliable energy for your RV, marine system, or off-grid application. Whether you’re living on the road, cruising open waters, or powering a small home, this kit provides the unmatched performance and peace of mind you need.
Each HUSKY 2 INV battery is packed with 5.12kWh of energy-dense LiFePO₄ storage, built with Tier 1 LFP cells, and engineered with precision to provide maximum durability, longevity, and efficiency. With four batteries included, you get a system that drastically extends runtime, boosts your power capacity, and eliminates the frustrations of lead-acid maintenance.
Designed for true all-weather performance, the HUSKY 2 features an IP65-rated waterproof enclosure, a self-heating system for cold-weather charging, and an advanced BMS with cell-balancing and critical safety protections. Plus, full CANBus and RS485 communication protocols allow you to seamlessly monitor system performance and integrate with smart inverters or energy management systems.
Key Features:
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Huge 20.48kWh Capacity – 4x 5.12kWh HUSKY 2 batteries for serious energy needs
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Plug-and-Play Setup – All necessary terminal cables included for fast installation
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Self-Heating Technology – Supports winter charging and cold climate operation
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Tier 1 LiFePO₄ Cells – Unmatched safety, long cycle life, and performance
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IP65-Rated Casing – Dustproof, waterproof, and vibration-resistant
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Advanced BMS – Built-in protections for over/under voltage, temp, and current
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Smart Monitoring – CANBus + RS485 protocols for system visibility
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Zero Maintenance – Fully sealed, no fluids, no upkeep, just clean power
Ideal For:
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Class A, B, & C RVs
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Camper Vans & Tow-Behind Trailers
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Boats, Yachts, and Marine Systems
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Food Trucks & Commercial Vehicles
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Off-Grid Cabins & Tiny Homes
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Emergency Backup Power
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Mobile Light Towers & Signs
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Lead-Acid Battery Replacements
What’s Included:
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4 × 12V HUSKY 2 INV – 5.12kWh LiFePO₄ Batteries (FHSKY-12051-G2-INV)
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3 × 4AWG (Black and Red) 21" Ring-to-Ring Terminal Cables (CBL092)
Specifications
Product Specifications
| 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 |
| Spec Sheet Download: |
Spec Sheet |
| User Manual Download: |
User Manual |
| Safety Data Sheet Download: |
Safety Data Sheet |
Why Buy From Us
Why Buy From Ecogrid Supply?
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Authorized & Trusted Dealer: We’re fully authorized for every brand we carry, so you get genuine products with full manufacturer warranties.
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Fast, Reliable Shipping: All items ship from our U.S. warehouses with quick and dependable freight options to keep your project on track.
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30-Day Hassle-Free Returns: Change your mind? No worries — enjoy a simple 30-day return process for peace of mind.
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Real Human Support, 7 Days a Week: Reach us by phone, email, or live chat — no bots, no overseas call centers, just real people who know off-grid power systems.
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Expert Energy Guidance: Our solar and backup energy specialists are ready to help you with design, planning, product questions, and installation tips.
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USA-Based Service: Our team proudly operates here in the United States, providing local, knowledgeable, and friendly support.
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Secure Payments: Shop confidently with our encrypted, secure checkout to protect your personal and payment information.
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Built for Energy Independence: Whether you’re powering a cabin, prepping for emergencies, or going off-grid, our products are selected for performance, reliability, and sustainable operation.
Buying Guide
