Big Battery | 12V HUSKY 2 – LiFePO4 – 400Ah – 5.12kWh
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:
-
Nominal Voltage: 12V
-
Energy Capacity: 5.12kWh
-
Amp-Hour Rating: 400Ah
-
Cell Type: Tier 1 LiFePO4 (Lithium Iron Phosphate)
-
Enclosure: IP65-rated, vibration-resistant, outdoor-ready
-
Battery Management System: Advanced BMS with auto-balancing
-
Cold Weather Feature: Integrated self-heating
-
Communication: RS485 and CANBus compatible
-
Cycle Life: 4000–7000+ cycles
Ideal For:
-
RVs and Camper Van Energy Systems
-
Trolling Motors & Marine Applications
-
12V Off-Grid Solar Banks
-
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 |
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!
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! All products on Solar Guys Pro are 100% brand-new and in perfect condition.
We do not sell any used or refurbished items.
Orders over $500 include a FREE (Normally $149.99) 80-Page DIY Solar eBook — added automatically at checkout.
Frequently Asked Questions
Get your 30% Tax Solar Credit!
Unlock substantial savings with the government's Solar Tax Credit, which offers a robust 30% deduction on the installation costs of solar systems. This attractive incentive is your ticket to leveraging solar energy's eco-friendly potential while enjoying the financial benefits.
At Solar Guys Pro, our commitment is to you. Please be reminded that our expertise does not extend to tax advice. Nonetheless, our dedicated staff is eager to guide you through the process and ensure you capitalize on this exceptional offer.
Contact us now to learn more!