12V 300Ah 8D Cold Weather Lithium Deep Cycle Battery

Description

Cold-Weather High-Capacity Lithium Power in an 8D Size – The VTL12-300CW 12V 300Ah lithium battery is engineered for high-demand solar, RV, marine and backup power systems requiring high-capacity energy storage in cold climates. It can be recharged at temperatures as low as -30°C, compared with a minimum charging temperature of 0°C for the standard VTL12-300. With 3840Wh of energy and integrated Bluetooth monitoring, it delivers dependable, maintenance-free performance where long runtime and reliable power are critical.

Compatible With / Replaces

This 12V 300Ah cold-weather LiFePO₄ battery can replace high-capacity lithium batteries including:

• EWLI12V-300
• EWLI12V-300BH
• RB300
• RBT12300LFP
• WPL8D

Key Features

• Extreme Cold-Weather Charging – Can be safely recharged at temperatures from -30°C to 45°C (-22°F to 113°F).
• Integrated BMS – Protects against overcharge, over-discharge, short circuits and overheating.
• High Capacity & Long Cycle Life – More than 4,000 cycles at 50% depth of discharge for an extended lifespan.
• Bluetooth Monitoring – Track battery status, voltage and health from your smartphone.
• Reliable High Output – Efficient power delivery for large solar arrays, RVs and marine systems.
• Lightweight Design – Up to 50% lighter than an equivalent lead-acid battery.
• Wide Operating Temperature – Operates safely from -20°C to 60°C (-4°F to 140°F).
• Maintenance-Free – No watering or equalizing required.

Common Applications

• Cold-climate off-grid solar systems
• Winter RV and camper power
• Marine deep cycle applications
• Backup power for off-grid systems
• High-demand power systems

Specifications

• Model: VTL12-300CW
• Nominal Voltage: 12.8V
• Capacity: 300Ah (3840Wh)
• Chemistry: LiFePO₄ (Lithium Iron Phosphate)
• Charging Temperature: -30°C to 45°C (-22°F to 113°F)
• Group Size: 8D
• Length: 520 mm (20.47″)
• Width: 269 mm (10.6″)
• Height: 220 mm (8.66″)
• Weight: 32 kg (70.5 lbs)
• Terminal Type: M6 Insert
• Data Sheet: VTL12-300CW Specifications (PDF)
• Warranty Info: View warranty coverage (PDF)

Choose the VTL12-300CW for high-capacity energy storage, extended runtime and dependable charging in temperatures as low as -30°C. For applications that do not require charging below freezing, see the standard 12V 300Ah Lithium Deep Cycle Battery.

Frequently Asked Questions

What makes the VTL12-300CW a cold-weather battery?

The VTL12-300CW can be recharged at temperatures as low as -30°C (-22°F). The standard VTL12-300 requires a temperature of at least 0°C (32°F) for charging. This makes the CW model a better choice for cold climates and winter applications.

What is a LiFePO₄ lithium battery?

A LiFePO₄ (Lithium Iron Phosphate) battery is a high-performance lithium battery with a long service life, lightweight construction and stable lithium chemistry. It is ideal for large solar, RV, marine and backup power systems.

How does this battery compare with lead-acid batteries?

This high-capacity lithium battery is lighter, charges faster and maintains a higher voltage under load than traditional lead-acid or AGM batteries. It also offers more than 4,000 cycles at 50% depth of discharge.

Can I connect multiple batteries together?

You can connect up to four VTL12-300CW batteries in series to create a 48V 300Ah battery bank, or connect up to four in parallel to create a 12V 1,200Ah battery bank. Always use batteries of the same model and state of charge, and ensure all connections follow safe wiring practices and the battery’s built-in management system (BMS) limits.

Do I need a special charger?

Yes. To maximize battery life and performance, use a lithium-compatible charger or a multi-stage charger that supports LiFePO₄ chemistry. Standard lead-acid chargers are not recommended unless they have a lithium charging mode.

Can I recharge this battery below freezing?

Yes. The VTL12-300CW can be recharged at temperatures from -30°C to 45°C (-22°F to 113°F), making it suitable for applications where the battery must charge during freezing winter conditions.