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The Epoch 12V 300Ah Pro Series Dual Purpose battery starts compatible outboards and powers house loads from one BCI Group 8D LiFePO4 battery. It stores 3.84kWh and weighs 81 lb, far lighter than typical 130-160 lb Group 8D lead-acid batteries.
A high-output BMS delivers 1,000A for up to 5 seconds and 300A continuous, with internal heating, an IP67 enclosure, Bluetooth monitoring and CAN Link ports. It is rated for 6,000+ cycles and backed by an 11-year manufacturer warranty when registered within 90 days of purchase.
Key Features
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Cranking power: 1,000A for up to 5 seconds and 800A for up to 10 seconds for engine starting and start-up surges.
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300A continuous output: 300A continuous (150A recommended) for house loads and 3,000W-class inverter systems.
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Fast charging: Accepts up to 300A from all sources combined, with up to 150A recommended.
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Self-heating: With a charger connected in cold weather, the heating film warms the battery to 10°C (50°F) before charging, down to -20°C (-4°F).
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IP67 enclosure: Dust-tight and protected against temporary immersion to 1 m for 30 minutes.
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Bluetooth and CAN: The Epoch Pro app shows battery data and installs firmware updates; CAN Link in/out ports network a bank.
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Series and parallel: Up to 4 in series (48V class) or 16 in parallel (4,800Ah, 61.44kWh at 12V).
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6,000+ cycle life: Rated at 0.2C and 80% DoD to 80% of initial capacity at 25°C.
Expandability
- Up to 16 in parallel at 12V (4,800Ah, 61.44kWh)
- Up to 4 in series for 24V, 36V or 48V
- With batteries in series, up to 4 strings in parallel (4S4P maximum: 51.2V, 1,200Ah, 61.44kWh)
- Use matched DP12300H batteries within 0.5V of each other
Communications
- Bluetooth to the Epoch Pro app (iOS and Android) with over-the-air firmware updates
- CAN Link in and Link out ports for bank networking
- Victron and NMEA 2000 connection through the optional Pro Series communications box (sold separately)
- Optional Pro Series 5 in touchscreen display (sold separately)
Recommended Charging Settings
- Bulk/absorption: 14.2V recommended (14.2V-14.6V range)
- Float: 13.8V recommended (13.4V-13.8V range); off preferred where the charger allows
- Equalization and temperature compensation disabled
- Up to 150A recommended; 300A maximum from all sources combined
- 15.4V is a listed maximum, not a charger target
- For alternators, use a DC-to-DC charger or lithium-ready regulation
Suitable For:
- Marine engine starting for compatible outboards
- Dual-purpose boat systems combining starting and house power
- Marine electronics, sonar, livewell and bilge pumps
- RV, van and overland 12V house power
- 3,000W-class inverter systems
- Solar, off-grid, cabin and backup power
- 24V to 48V banks
Please Note: Rated by peak current and duration, not CCA: verify the engine maker's battery requirements, alternator, wiring and charging profile before replacing a starting battery.
Please Note: Keep enough charge in reserve to start the engine.
Please Note: IP67 is not for submersion, water jets or pressure washing; do not install in a bilge or where standing water collects.
Please Note: Mount upright only, never on its side or upside down; install a DC-rated main fuse close to the positive terminal.
Please Note: Not a drop-in replacement for every lead-acid installation: check tray, hold-downs, lid clearance and cable reach.
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Specifications
Model / SKU: DP12300H
Series: Pro Series
Battery type: Dual-purpose cranking and deep-cycle LiFePO4 battery
Battery group size: BCI Group 8D footprint
Chemistry: LiFePO4 / lithium iron phosphate
Cell configuration: 4S3P
Bluetooth: Yes — Epoch Pro app (iOS and Android), over-the-air firmware updates
Communications: CAN (Link in / Link out ports); Victron and NMEA 2000 through the Pro Series communications box
Internal heating: Yes — internal heating film; warms the battery to 10°C before charging (charger connected)
Cycle life: 6,000+ cycles
Warranty: 11-year manufacturer warranty
Nominal voltage: 12.8V
Nominal capacity: 300Ah
Nominal energy: 3.84kWh / 3840Wh
Operating voltage range: 10.0V – 15.4V
Maximum charge voltage: 15.4V listed maximum (not a charger target)
Internal resistance: <30mΩ
Max continuous discharge: 300A
Max continuous charge current: 300A (all sources combined)
Recommended charge current: 150A
Recommended discharge current: 150A
Cranking peak current: 1,000A for up to 5 seconds; 800A for up to 10 seconds (cranking and start-up surges; tested above 60% SOC at 25°C)
Short-circuit protection: 1200A / 500µs
Series connections: Max 4 batteries in series, up to 48V
Parallel connections: Max 16 batteries in parallel
Bank design note: Use matched batteries of the same model, age, capacity, and state of charge
Charge temperature range: -20°C to 55°C / -4°F to 131°F, with heating
Discharge temperature range: -20°C to 60°C / -4°F to 140°F
Recommended storage temperature: 0°C to 35°C / 32°F to 95°F
Low-temperature charge protection: Heater warms the battery to 10°C before charging
Length: 19.7 in / 500 mm
Width: 10.5 in / 267 mm
Height: 9.75 in / 248 mm
Weight: 81 lbs / approx. 36.7 kg
Enclosure protection: IP67 (IEC 60529) — dust-tight, temporary immersion; not for submersion
Terminal type: M8 bolt
Terminal torque: 8–10 N·m (71–89 in-lb)
Optional accessories: Pro Series 5 in touchscreen display and Pro Series communications box
Bulk / absorption voltage: 14.2V recommended (14.2V – 14.6V range)
Float voltage: 13.8V recommended (13.4V – 13.8V range); float off preferred where the charger allows
Equalization: Disabled
Temperature compensation: 0mV/°C (disabled)
Recommended charge rate: Up to 150A (50% of the battery or battery-bank capacity)
Battery charge temperature range: -20°C to 55°C / -4°F to 131°F, with heating
Battery discharge temperature range: -20°C to 60°C / -4°F to 140°F
Certifications: UL 1973 (certificate of compliance available), CE, RoHS; transport UN 38.3
Enclosure rating: IP67 (IEC 60529)
Warranty: 11-year manufacturer warranty
In the Box
- 1 x Epoch 12V 300Ah Pro Series Dual Purpose LiFePO4 battery (DP12300H)
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DP12300H Spec Sheet
DP12300H User Manual
DP12300H Technical Data Sheet
DP12300H UL 1973 Certificate of Compliance
Epoch LiFePO4 Safety Data Sheet
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Epoch Batteries Limited Warranty
Warranty Period
11-year manufacturer warranty; register within 90 days of purchase
Epoch Batteries-branded products are covered against qualifying defects in materials and workmanship for the applicable warranty period, subject to Epoch's model-specific remedy schedule and the terms of its warranty policy. Epoch-branded chargers carry a 2-year limited warranty and accessories (such as fuel gauges and voltage reducers) a 1-year limited warranty, from the original purchase date.
Registration
Register your battery with Epoch within 90 days of purchase for full warranty coverage. If it is not registered within that time, the warranty period begins from the battery's original manufacturing date. Proof of ownership is required for any claim, and coverage is non-transferable and applies only to the original purchaser.
Remedy
After inspection and testing, Epoch will provide the applicable remedy for a qualifying manufacturing defect: an approved repair, a replacement, or a comparable-product offer according to the model's schedule. Typical repair turnaround is 3–10 business days once the product is received.
Exclusions
Coverage may be denied when a failure is caused by misuse, improper handling, installation or storage, or use outside the product's specifications. Examples include an unsecured battery; loose, corroded or improperly connected terminals; series or parallel connections beyond the manufacturer's recommendations; reverse polarity or short circuits; impact, fire or water submersion; storage above 140°F or below -40°F; prolonged storage fully discharged or batteries left uncharged for more than three months; poor crimps, undersized cables or damaged wiring; opened, modified or tampered products; and use in applications the battery was not designed for, including repeated engine starting on non-cranking models.
Obtaining Warranty Service
Start a claim through the Epoch Batteries Warranty Portal with your model and serial number, proof of purchase, a description of the issue and supporting photos or videos. If approved, Epoch provides an RMA number and packing instructions. Do not ship a product without a valid RMA. The customer arranges and pays for shipment to Epoch, packaged in compliance with lithium battery shipping rules. Epoch Batteries can be reached at 1-888-501-1846 or support@epochbatteries.com.
Visit Epoch's Warranty Page to review the full warranty terms.
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Shipping is typically through freight carriers and the actual shipping time is contingent on your location and the specific warehouse dispatching your order. Please allow for a 1-3 business day processing period before shipment, and an estimated delivery time of up to 7 business days. Your confirmation email will include delivery details and we will send you a tracking number as soon as one is available. If you ordered several separate items, you may receive multiple tracking numbers. Once the item has been shipped, the freight service will contact you to coordinate the date and time of delivery. If you require any special accommodations during delivery please let us know as soon as possible and let the delivery company know when arranging the appointment.
Typically, orders will be dropped off either curbside or outside your front door or garage. It is your responsibility to bring the order inside or to its final destination and to remove any existing items.
Depending on the item, parts may be shipped in multiple boxes, and assembly may be required. When your order is delivered, please check that you have all pieces of the item and that nothing is damaged. If your order is damaged during transit and external damage is visible, note the damage immediately, write it on the delivery documents, take photos and/or videos, and refuse shipment. If there is no visible external damage, accept the package but note “subject to concealed damage” on the delivery documents. Any damage upon delivery needs to be reported within 24 hours of delivery or you may not be eligible for a refund. For additional information on submitting claims, as well as incorrect item exchanges, and replacements, please see our Refund Policy.
For more information about shipping, please visit our complete Shipping Policy.
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Why Shop With Eco Emperor?
At Eco Emperor, our mission is to empower you to lead a sustainable and fun lifestyle with ease and confidence. Whether you're upgrading your outdoor experience or enhancing your eco-conscious journey, here’s why choosing us is a decision you can feel great about:
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