The Epoch DP12300H is a 12.8V 300Ah Lithium Iron Phosphate (LiFePO4) dual-purpose battery manufactured by Epoch Batteries. Lithium Battery Supply is an authorized dealer of Epoch Batteries products. This battery is designed for applications requiring both deep cycle capacity and engine cranking capability, including marine vessels, RVs, off-grid solar systems, and industrial equipment.

This battery combines 300A continuous discharge capability with 1,000A peak cranking power (5 seconds), making it suitable for powering house systems while maintaining emergency engine starting capability. The battery includes built-in Bluetooth monitoring, internal self-heating for cold-weather charging, CAN/RS485 communication ports for system integration, and IP67 waterproof/dustproof construction.

Technical Specifications

• Manufacturer: Epoch Batteries
• Model Number: DP12300H
• Nominal Voltage: 12.8V
• Nominal Capacity: 300Ah (at 0.2C discharge rate)
• Chemistry: LiFePO4 (Lithium Iron Phosphate)
• Nominal Energy: 3.84kWh (3,840 Watt-hours at 0.2C)
• Minimum Capacity: 294Ah (tested at 25±2℃)
• Internal Resistance: ≤30 milliohms (at 1kHz AC, 50% SOC)
• Dimensions (L x W x H): 19.7" x 9.8" x 9.1" (500mm x 250mm x 230mm)
• Weight: 80.5 lbs (36.5 kg without accessories)
• Terminal Type: M8 bolt (torque: 8-10 N·m)
• Enclosure Protection: IP67 (waterproof and dustproof)
• Cycle Life: 6,000+ cycles at 80% depth of discharge (per manufacturer specifications)
• Self-Discharge Rate: ≤3% per month / ≤15% per year (residual capacity)
• Warranty: 11-year manufacturer warranty provided by Epoch Batteries

Electrical Performance Specifications

Discharge Parameters (at 25°C):

• Max Continuous Discharge Current: 300A
• Recommended Discharge Current: 150A
• Peak/Surge Current: 1,000A for 5 seconds (cranking power)
• Short Circuit Protection: 1,200A / 500 microseconds
• End of Discharge Voltage: 11V - 11.6V
• Discharge Temperature Range: -20°C to 60°C (-4°F to 140°F)

Charging Parameters (at 25°C):

• Max Continuous Charge Current: 300A
• Recommended Charge Current: 150A
• Charge Voltage: 14.2V (bulk/absorption)
• Float Voltage: 13.8V
• Charge Temperature Range: -20°C to 60°C (-4°F to 140°F)
• Optimum Operating Temperature: 15°C to 35°C (59°F to 95°F)

Temperature Specifications

• Charge Temperature Range: -20°C to 60°C (-4°F to 140°F)
• Discharge Temperature Range: -20°C to 60°C (-4°F to 140°F)
• Optimum Operating Temperature: 15°C to 35°C (59°F to 95°F) for best performance and cycle life
• Storage Temperature (≤6 months): 0°C to 30°C (32°F to 86°F)
• Storage Temperature (≤3 months): -10°C to 45°C (14°F to 113°F)
• Recommended Storage Environment: 15°C to 35°C (59°F to 95°F), 5% to 75% relative humidity
• Low-Temperature Charge Protection: Yes (internal self-heating system enabled)
• Operating Altitude: Up to 3,000 meters (9,842 feet)

Note: The battery pack will automatically stop operation to protect itself when temperature is outside the operating range. Frequent exposure to extreme temperatures may reduce performance and cycle life. For optimal longevity, operate within the 15°C to 35°C range when possible.

Safety Certifications & Compliance

• IP67 Rating: Dustproof and waterproof (submersion up to 1 meter for 30 minutes)
• Safety Certifications: UL1973, RoHS, CE certified (per manufacturer specifications)
• Operating Altitude: Rated for use up to 3,000 meters elevation

Features & Protection Systems

Built-in Battery Management System (BMS): The integrated BMS provides comprehensive protection including over-charge protection, over-discharge protection, over-current protection (300A continuous), short circuit protection (1,200A / 500 microseconds), and high/low temperature protection. The BMS monitors individual cell voltages and temperatures to ensure safe operation during both deep cycle discharge and high-current cranking events.

Self-Heating System: The battery includes an internal self-heating element that enables charging in temperatures as low as -20°C (-4°F). The heating system activates automatically when charging is attempted in cold conditions, protecting the battery cells while maintaining charge acceptance capability in freezing environments.

Bluetooth Monitoring: The battery includes built-in Bluetooth connectivity compatible with iOS and Android devices. The monitoring app displays real-time voltage, current, state of charge, cycle count, individual cell voltages, and temperature data for comprehensive battery management.

Communication Ports: This battery features CAN and RS485 communication ports for integration with advanced battery monitoring systems, inverters, and charge controllers. These ports enable the battery to communicate charge parameters and status directly to compatible equipment.

IP67 Waterproof Rating: The battery case is rated IP67 for protection against dust ingress and temporary water immersion (up to 1 meter depth for 30 minutes), making it suitable for marine environments, outdoor applications, and harsh operating conditions per manufacturer specifications.

Dual-Purpose Design: This battery is engineered to provide both deep cycle energy storage (300Ah capacity) and high-current cranking capability (1,000A for 5 seconds) in a single unit, according to manufacturer specifications. This eliminates the need for separate house and starting batteries in many applications.

Connection Capabilities

• Parallel Only: Up to 16 batteries in parallel (maximum)
• Series and Parallel: Up to 4 batteries in series AND 4 batteries in parallel simultaneously (48V system with 1,200Ah capacity possible)
• Communication Protocol: CAN and RS485 for system integration and monitoring
• Bluetooth: Built-in for wireless monitoring via mobile devices

Note: When connecting batteries in series or parallel, use batteries of the same model, capacity, and age. Follow manufacturer installation instructions for proper cable sizing and connection procedures.

Applications

According to manufacturer documentation, this 12.8V 300Ah dual-purpose battery is designed for the following applications:

Marine Applications:

• House battery banks for boats and yachts (powers electronics, lighting, appliances, navigation equipment)
• Emergency engine starting capability (verify your engine's cranking amp requirements are within the 1,000A peak capacity)
• Fishing vessels requiring extended off-grid operation with IP67 waterproof protection
• Sailboats and powerboats with 12V electrical systems

RV & Motorhome Applications:

• House battery systems for appliances, lighting, entertainment systems, and electronics
• Off-grid camping power storage with high charge acceptance from solar panels
• Replacement for multiple Group 27 or Group 31 AGM or lead-acid batteries
• Emergency engine starting backup for motorhomes and travel trailers

Solar Energy Storage:

• Off-grid cabin and residential solar battery banks (12V or 24V/48V when configured in series)
• Backup power systems with renewable energy integration
• 12V solar installations requiring high charge acceptance rates (up to 300A maximum, 150A recommended)
• Grid-tied solar systems with battery backup capability

Industrial & Commercial Equipment:

• Material handling equipment requiring deep cycle operation (verify voltage and current requirements match equipment specifications)
• Golf carts and utility vehicles (verify system compatibility with 12.8V nominal voltage)
• Commercial equipment and tools requiring portable power storage
• Emergency backup power for critical systems

Important Compatibility Note: Before installation, verify that this battery's specifications match your equipment requirements. For marine engine starting, confirm your engine's cranking amp requirements are within this battery's 1,000A (5 second) peak discharge capability. For house systems, verify your inverter or charge controller is compatible with 12.8V LiFePO4 batteries and can be programmed for the charging parameters listed below. Contact your equipment manufacturer for compatibility verification.

Charging Settings

To properly charge this Epoch DP12300H battery, verify that your charging equipment (battery charger, solar charge controller, inverter charger, converter, or DC-to-DC charger) can be programmed for the following manufacturer-specified parameters:

Charging Source Compatibility: This battery is compatible with multiple charging sources including solar charge controllers, shore power inverter/chargers, vehicle alternators with DC-to-DC chargers, and standalone battery chargers. Multiple charging sources can operate simultaneously when properly configured. The battery accepts charge currents up to 300A maximum (150A recommended) for fast recharging from solar, alternator, or shore power sources.

Important: Not all chargers support programmable settings for lithium batteries. If your charger does not have programmable settings, verify it outputs 14.2V for bulk/absorption charging and 13.8V for float charging. Disable equalization and temperature compensation if those options are available. Consult your charger's manual or contact the charger manufacturer for programming instructions specific to LiFePO4 lithium batteries.

Performance Characteristics

Temperature Performance (per manufacturer testing at 0.2C discharge rate):

• At -20°C (-4°F): ≥60% of rated capacity (after 6 hours at temperature)
• At 0°C (32°F): ≥80% of rated capacity (after 6 hours at temperature)
• At 25°C (77°F): ≥100% of rated capacity (after 4 hours at temperature)
• At 55°C (131°F): ≥95% of rated capacity (after 4 hours at temperature)

Capacity Retention (per manufacturer testing):

• 28-Day Storage Test: ≥96% capacity retention when stored at 25±2°C and then discharged at 0.2C rate
• Self-Discharge Rate: ≤3% per month / ≤15% per year (residual capacity in sleep/power-off mode)
• Recovery Capacity: ≤1.5% per month / ≤8% per year

System Integration & Compatibility

Inverter & Charge Controller Compatibility: This battery is designed to work with 12V inverter systems and charge controllers that support LiFePO4 batteries. The CAN and RS485 communication ports enable integration with compatible equipment from manufacturers including Victron Energy, Schneider Electric, Sol-Ark, Growatt, and others. Verify your specific equipment model supports lithium batteries and can be programmed for the charging parameters listed above.

Battery Replacement Applications: This battery can replace Group 27, Group 31, or larger lead-acid/AGM batteries in recreational vehicles, boats, off-grid cabins, and backup power systems. A single DP12300H can replace multiple smaller batteries connected in parallel. Verify physical dimensions (19.7" x 9.8" x 9.1") fit your battery compartment before installation.

Marine Engine Starting: The battery's peak cranking capability (1,000A for 5 seconds) is suitable for marine engine starting applications. Verify your specific engine's cranking amp requirements before relying on this battery for engine starting. Consult your engine manufacturer's specifications to confirm compatibility. The battery can serve dual-purpose for both house loads and engine starting in many applications.

Installation Recommendation: Professional installation is recommended for marine and RV applications to ensure proper mounting, electrical connections, terminal torque (8-10 N·m for M8 bolts), and compliance with safety standards. Improper installation may affect performance and void warranty coverage.

Storage & Maintenance

Storage Guidelines (per manufacturer specifications):

• Store batteries at approximately 50% state of charge (SOC) for optimal long-term storage
• For storage up to 6 months: maintain temperature between 0°C and 30°C (32°F to 86°F)
• For storage up to 3 months: maintain temperature between -10°C and 45°C (14°F to 113°F)
• Recommended storage environment: 15°C to 35°C (59°F to 95°F) with 5% to 75% relative humidity
• Store in dry, clean, dark, well-ventilated indoor location
• If not used for extended periods, recharge battery every 6 months according to manufacturer specifications
• Keep battery away from heat sources, high voltage, direct sunlight, water, and fire
• Do not stack more than 6 layers; keep batteries face up during storage

Maintenance:

• This is a maintenance-free battery - no watering or terminal cleaning required
• Manufacturer recommends fully charging battery once per month to correct state of charge (SOC) readings
• Recharge battery within 2 days when depleted to prevent over-discharge damage
• Use only lithium-compatible battery chargers programmed for LiFePO4 chemistry
• Discontinue use if battery emits unusual smell, generates excessive heat, shows distortion, or exhibits any abnormal behavior

What's Included

• Epoch DP12300H 12.8V 300Ah LiFePO4 Battery (with built-in BMS, Bluetooth, self-heating, and CAN/RS485 communication)
• M8 terminal bolts
• Bluetooth monitoring app access (iOS and Android compatible)
• Installation and user manual with safety warnings
• Warranty registration information