12.8V 300Ah Marine LiFePO4 Battery 3840Wh Self Heating Yacht Deep Cycle CAN IP67

12.8V 300Ah Marine LiFePO4 Battery 3840Wh Self Heating Yacht Deep Cycle CAN IP67

Cold-climate cruising demands a battery that can charge even when the hull is iced over. This 12.8V 300Ah marine LiFePO4 battery adds an internal heating film that warms the cells to 5C before accepting charge, so a yacht on a northern mooring tops up overnight instead of waiting for spring. With 3840Wh on tap and a CAN bus feed, it doubles as a monitored house bank for long-range passage makers.

Specifications

Core Specifications

Rated at 12.8V and 300Ah, this marine battery stores 3840Wh. Internal resistance is held to 30 milliohms or less, efficiency is 98 percent and self discharge is below 5 percent per month. Cycle life exceeds 4000 cycles at 1C and 80 percent depth of discharge. Cells run in a 4 series 3 parallel (4S3P) arrangement. Dimensions are 520mm by 240mm by 220mm and weight is 32 kilograms. Power leaves through M8 terminals from an ABS housing sealed to IP67 and able to survive brief immersion.

Cycle Life and Longevity of This Marine Battery

Yacht owners who cycle this marine battery daily still see ten years of service before reaching 80 percent capacity. The self-heating film removes the cold-charge penalty that shortens ordinary lithium packs, so this marine battery keeps its full cycle count in high-latitude waters where unheated rivals fade early.

Why LiFePO4 Beats Lead-Acid Onboard

Yachts that carry lead-acid house banks pay for weight, space and frequent replacement; this marine battery cuts the floor space and the kilos while tripling usable cycle count. The self-heating film removes the cold-weather limitation that rules out ordinary lithium on northern moorings, and the CAN feed turns the bank into a monitored asset rather than a black box.

Charging Recommendations

Charge this marine battery at 14.2 to 14.6V, 150A recommended or 300A maximum, after the heater has raised cell temperature above 5C. Store between 30 and 50 percent in cold months, and let the CAN bus confirm SOC and temperature before enabling the charger on a hard frost.

Environmental Tolerance of This Marine Battery

This marine battery discharges from -20C to 60C and charges from 0C to 55C once the heater lifts cell temperature above 5C. Storage spans -20C to 60C with a 65C BMS cutoff. The IP67 ABS enclosure tolerates spray, rain and short immersion, which suits exposed transom lockers and wet engine rooms.

Communication and Monitoring of This Marine Battery

A CAN bus port feeds pack voltage, current, SOC, temperature and fault codes straight to the yacht management system, while RS485 and Bluetooth cover retrofits. The BMS protects this marine battery at 14.6V overcharge, 10V over-discharge, 300 to 800 microsecond short circuit and 65C thermal limits.

Applications for This Marine Battery

This marine battery powers blue-water yachts, catamarans and expedition vessels. It runs autopilots, radar, refrigeration, watermakers, anchor windlasses and navigation suites with headroom to spare. Series and parallel expansion builds 24V to 48V banks, and the CAN feed integrates with Victron and Mastervolt monitoring.

Installation and Safety of This Marine Battery

Bolt this marine battery to a level, ventilated mount, torque M8 terminals to 8 to 10 Nm and terminate the CAN bus with a 120 ohm resistor at each end. Enable the heater only on a charge source above 0C ambient, never short the terminals, and keep the case clear of standing water in the engine room.

Frequently Asked Questions

Q: When does the self-heating film activate?
A: The BMS energises the heater below 5C and disables charging until cells reach that threshold, protecting this marine battery from lithium plating.

Q: Does the CAN bus work with Victron gear?
A: Yes, the protocol matches common marine CAN profiles, so this marine battery drops into Victron, Mastervolt and Victron-compatible networks.

Q: Can it be mounted in the engine room?
A: The IP67 case handles heat and spray, but keep ambient below 55C and leave 20mm of air gap around this marine battery for the heater to shed warmth evenly.

Q: How much power does the heater draw?
A: The film draws a modest current only while warming cold cells, then stops once they pass 5C, so the impact on this marine battery capacity is negligible.

Q: Can two banks be combined?
A: Parallel banks are supported when both this marine battery units share the same SOC and charging profile; size busbars for the combined current.

Warranty and Shipping

This 12.8V 300Ah marine battery includes a 5-year limited warranty on defects and capacity retention above 80 percent after 3000 cycles. Lead time is 15 to 25 days with Ecolite cartons, foam blocking and export pallets. L/C, T/T, PayPal and Western Union are accepted, and FOB or DDP pricing is available on request.

OEM and Customization

OEM programs cover private-label case art, engraved terminal caps and CAN profile tuning for your inverter brand. Our team issues a wiring and resistor map before tooling. OEM runs begin at 100 units.

What's Included

Shipped with the 300Ah LiFePO4 pack, integrated BMS with self-heating film, sealed IP67 ABS case, CAN port, M8 bolts and a manual. Charger and cabling are optional.