BigBattery 12V HUSKY 2 Lithium Battery – 5.12kWh of Smart, Safe, Off-Grid Power
Take your 12V power system to the next level with the BigBattery 12V HUSKY 2, delivering 5.12kWh of ultra-reliable LiFePO₄ energy in a durable, compact form factor. Whether you're powering your RV, marine vessel, off-grid cabin, or emergency backup system, the HUSKY 2 is engineered for maximum performance, safety, and long-term value.
This INV variation comes fully equipped with inverter communication support, making integration with your existing power setup seamless and smart. Built with Tier 1 lithium iron phosphate (LFP) cells, the HUSKY 2 ensures industry-leading cycle life and chemical stability. Its IP65-rated housing, advanced BMS, and self-heating functionality make it an all-weather workhorse that won’t let you down—even in cold climates.
Whether you're cruising on the water, camping in the mountains, or living fully off-grid, the 12V HUSKY 2 is your trusted lithium upgrade to replace bulky lead-acid setups and power your adventures with confidence.
Key Features:
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Massive 5.12kWh Capacity – Supports a wide range of 12V systems
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Inverter Communication Enabled – INV version supports smarter integration
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Tier 1 LiFePO₄ Cells – Safe, stable, and long-lasting battery chemistry
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IP65-Rated Casing – Dustproof and water-resistant for rugged conditions
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Self-Heating Functionality – Enables cold-weather charging
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Advanced BMS – Protects against over/under voltage, current, and temperature extremes
- Plug-and-Play Setup – Includes mounting hardware and terminal cables
Perfect For:
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Lead-Acid Battery Replacement
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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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Emergency Power & Mobile Backup
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Light Towers & Digital Signs
What’s Included:
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1 × 12V HUSKY 2 – 5.12kWh LiFePO₄ Battery (INV Version)
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2 × HUSKY 2 Carrying Handles
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2 × L Mounting Brackets
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2 × M8 Screws
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1 × Red & Black Terminal Rubber Cover
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1 × 2AWG 3FT Red & Black Ring to Ring Terminal Cables (CBL086)
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
