Reliable Winter-Ready Power for RVs, Cabins & Off-Grid Applications

Brave the cold with the Bear Volts Polar Series 12 V 300 Ah LiFePO₄ Heated Deep Cycle Battery. Engineered for harsh conditions, this premium lithium deep-cycle battery features built-in self-heating technology, making it the ideal choice for four-season use—even when exposed to sub-zero environments.
Whether you’re powering large RVs, semi-trucks, boats, off-grid cabins, or backup energy systems, this battery brings durability, high capacity and trustworthy performance when it matters most.

Key Features & Benefits

• Built-in Self-Heating System: Automatically activates during charging in cold temperatures, enabling safe operation in freezing conditions.

• High Capacity – 300 Ah at 12.8 V (≈3,840 Wh): Plenty of energy for demanding loads and long runtimes. 

• Oversized 300 A Battery Management System (BMS): Delivers a continuous 300 A discharge and supports peak surges beyond 300 A — ideal for heavy-duty inverter systems.

• Grade A UL-listed LiFePO₄ Cells: Long life, deep-cycle capability, and safe chemistry for serious power systems.

• Wiring Flexibility: Up to four batteries may be wired in series (24 V, 36 V, 48 V systems) or in parallel (up to ~1,200 Ah total). 

• Rugged Construction: IP65-rated ABS case (dustproof and waterproof), M8 terminal posts, and compact footprint (20.5″ × 10.5″ × 8.69″, 65 lbs / 29.5 kg).

• 6-Year Canadian Warranty: Full replacement cost covered for first 3 years, then pro-rated coverage up to year 6. 

Ideal Applications

• Large RVs and trailers operating in cold climates

• Off-grid cabins and remote power-systems

• Boats, marine systems, and semi-truck cabins

• Backup power systems for homes, garages or critical loads

• Any system requiring high-end deep cycle power with cold-weather reliability

Why Choose Bear Volts & the Polar Series?

At Bear Volts, we understand the demands of Canadian winters and remote installations. The Polar Series builds on our established Kodiak platform, adding self-heating capability and high-current support so your system works when others fail. We stand behind our products with full technical support and a strong warranty—so you can install with confidence.

Specifications

• Chemistry: LiFePO₄ (Lithium Iron Phosphate)

• Nominal Voltage: 12.8 V

• Capacity: 300 Ah (≈3,840 Wh) 

• Continuous Discharge/Charge Current: 300 A

• Peak Discharge Current (<10s): 320 A 

• Self-Heating Enablement: Yes — charging function triggers cold-weather heating

• Max Series Configuration: Up to 4 units (24 V, 36 V, 48 V)

• Max Parallel Configuration: Up to 4 units (up to ~1,200 Ah capacity)

• Casing: IP65 ABS enclosure

• Terminals: M8 bolts supplied

• Weight: ~65 lbs / 29.5 kg

• Dimensions: 20.5″ x 10.5″ x 8.69″ 

• Warranty: 6-Year Limited Canadian Warranty (3 years full replacement, years 4-6 pro-rated) 

Get Yours Today

In stock now — ready for shipping across Canada. Add the Bear Volts 12 V 300 Ah LiFePO₄ Heated Deep Cycle Battery to your cart and secure your power system for all-season use.

Frequently Asked Questions (FAQ)

Q: Can I use this battery in winter when it's freezing outside?
A: Yes. The Polar Series model is specifically designed with a built-in heating system that activates when charging in below-0 °C environments. This enables safe charging and operation even in harsh winter conditions.

Q: Can I combine multiple batteries to increase voltage or capacity?
A: Absolutely. You can wire up to four units in series to create 24 V, 36 V or 48 V systems. Alternatively, you can wire up to four units in parallel to reach approximately 1,200 Ah of capacity.

Q: Is this battery compatible with my existing inverter and charger?
A: You’ll want a charger that’s configured for LiFePO₄ chemistry and can support the 12.8 V nominal voltage. We recommend using a lithium-specific charger and verifying your inverter’s input parameters to ensure safe operation.

Q: What kind of warranty is included?
A: The battery carries a 6-year limited warranty in Canada. For the first 3 years you’re covered for full replacement cost; years 4 to 6 are covered on a pro-rated basis.