Product Description

The BigBattery 12V HUSKY 2 INV is a 5.12 kWh, 400Ah LiFePO4 battery built for RV, off-grid, and marine applications. The INV model adds inverter communications, letting the battery talk directly to compatible inverters for closed-loop charging and monitoring — your system charges to the battery's actual state instead of guessing from voltage.

Why the 12V HUSKY 2 INV

  • 5.12 kWh from a single battery — 400Ah at 12V, serious capacity for boondocking, liveaboards, and off-grid cabins
  • Inverter communications (INV): closed-loop integration with compatible inverters for accurate state-of-charge and coordinated charging
  • LiFePO4 chemistry — stable lithium iron phosphate cells with a built-in battery management system (BMS) that protects against over-charge, over-discharge, and shorts
  • Drop-in 12V form factor for RV, van, and marine electrical systems

Who it's for

RVers and boaters who want multi-day autonomy from one battery, and 12V off-grid setups where a single high-capacity unit beats wiring several small ones. Need a different system voltage with the same 5.12 kWh capacity? The HUSKY 2 line also comes in 24V (200Ah) and 48V (100Ah) versions.

Specifications

Nominal voltage 12V
Capacity 400Ah — 5.12 kWh
Chemistry LiFePO4 (lithium iron phosphate)
Communication Inverter comms for closed-loop integration (INV model)
Protection Built-in BMS
Applications RV, off-grid, marine
SKU FHSKY-12051-G2-INV

Warranty & support

Covered by BigBattery's 12-year manufacturer warranty, backed by lifetime USA-based technical support.

Common questions

What does the INV designation mean?

INV models include communication hardware that lets the battery report state-of-charge, temperature, and health directly to compatible inverters — closed-loop charging instead of voltage-based guesswork.

Can I run an air conditioner from it?

Through a suitable inverter, a 12V HUSKY 2 can run an RV air conditioner; runtime depends on the unit's draw. For heavy or long-running AC loads, consider the 24V or 48V HUSKY 2 with a matching inverter.

How does LiFePO4 handle cold weather?

It discharges reliably in freezing temperatures, but the BMS restricts charging below freezing to protect the cells — mount the battery in an insulated compartment or heated space for year-round charging.

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