Epoch Batteries 12v - 300ah PRO SERIES (Duel Purpose) Marine / RV Lithium Battery

Epoch Batteries 12.8V 300Ah PRO Series for Marine and RV Power

Looking for a 12v lithium battery that can handle travel, storage, and demanding power loads with less maintenance? This marine RV battery combines deep-cycle capacity with starting support, making it a practical dual purpose battery for boats, campers, and off-grid backup systems.

With a 300ah battery rating, smart monitoring, and self-heating protection, this lithium deep cycle model is built for users who want dependable output, better control, and more flexibility in real-world conditions.

Manufacturer background and support

Epoch Batteries has been operating since 2022 and is based at 164 Andrew Dr., Stockbridge, GA 30281.

Phone: (888) 501-1846

Website: www.epochbatteries.com

Owners can use the manufacturer’s resources for setup help, product documentation, and warranty guidance when integrating this 12v lithium battery into a marine, RV, or backup power system.

Smart monitoring and cold-weather performance

This marine RV battery includes Bluetooth, a mobile application, CAN communication, and Victron communications for improved visibility into battery health and system behavior. Those tools help simplify monitoring while supporting a more efficient install.

The integrated self heating feature adds an extra layer of usability in cold climates, helping the battery remain ready when temperatures drop. For travelers, anglers, and solar users, that flexibility can make a noticeable difference throughout the year.

Key features at a glance

• Bluetooth: Yes
• Mobile application: Yes
• CAN communication: Yes
• Owner's manual: Yes
• Self heating: Yes
• Victron communications: Yes
• Integration with OEM display clusters: NA

Recommended charging settings for lithium systems

For reliable performance, configure chargers and controllers to match lithium chemistry. That includes converters, inverter chargers, solar controllers, and DC-to-DC equipment used with a lithium deep cycle battery.

• Bulk / Absorption: 14.2V to 14.6V
• Absorption time: Two batteries in parallel require 30 minutes per 200Ah
• Float: 13.4V to 13.8V
• Equalization: 14.4V / Disabled
• Temperature compensation: 0 / Disabled
• Charge rate: 50% of battery or battery bank capacity
• Battery charge temperature: 32°F to 131°F (0°C to 55°C)
• Battery discharge temperature: -4°F to 140°F (-20°C to 60°C)
• Cell charge temperature: 32°F to 131°F (0°C to 55°C)
• Cell discharge temperature: -4°F to 140°F (-20°C to 60°C)

Important: If your charger does not support every setting, confirm that it can still meet the required voltage range and disable unsupported functions before use. Always follow the charger manual or contact the manufacturer if you are unsure.

Technical specifications

• Voltage: 12.8V
• Amp hour rating: 300Ah
• Energy: 3.840 kWh
• Cell type: LiFePO4
• Connectivity: 4 in series | 3 in parallel
• Peak discharge current: 1000A (5s)
• Continuous discharge current: 300A
• Cold cranking amps: 100 CA, compatible with outboard motors up to 250hp
• Recommended discharge temperature range: -120°F to 131°F
• Charging temperature range: -4°F to 131°F with self heating
• Dimensions: 19.7" x 10.5" x 9.75"
• Weight: 81 lb
• Case type: Plastic shell
• Enclosure rating: IP67
• Terminal type: M8 / 8-12 N.m
• Self discharge: 3% per month
• Data sheet: www.epochbatteries.com

Ideal uses for off-grid, marine, and RV installations

This 300ah battery is a smart match for marine house loads, RV appliances, solar storage, and emergency backup power. It gives owners a single platform that can support both high-output and deep-cycle demands without forcing a compromise between runtime and versatility.

• Marine and trolling applications
• RV and camper electrical systems
• Solar battery banks
• Backup and emergency power
• High-demand off-grid setups

Installation tips for a cleaner system

When installing a dual purpose battery in a boat or RV, plan the layout before connecting cables. Confirm terminal fitment, secure mounting, and charger compatibility so the system starts with a solid foundation.

• Use a charger profile that matches lithium charging requirements
• Confirm polarity and torque specifications on all terminals
• Allow space for airflow and safe cable routing
• Review total system loads before adding multiple batteries

Warranty and product support

Manufacturer support is available Monday through Friday, 9am to 5pm EST, with online scheduling options for added convenience.

www.epochbatteries.com/support

Warranty: 11-year coverage, including 3 years at 100% and 9 years prorated.

www.eposchbatteries.com/warranty

FAQ

Ready to upgrade your power system?

If you want a high-capacity 12v lithium battery with strong output, smart monitoring, and dependable cold-weather support, this 300ah battery is a strong choice. Review the specs, confirm charger compatibility, and shop AwesomeBatteries.com for competitive pricing and free shipping on a premium dual purpose battery.