DL+ 12V 320Ah Dual Purpose Heated LiFePO4 Battery – Maximum Power for Off-Grid, RV, and Marine Systems
Take control of your power system with the DL+ 12V 320Ah Dual Purpose Heated LiFePO4 Battery, engineered for the most demanding off-grid, marine, and RV applications. Combining 320Ah of deep-cycle power with 1,000 CCA of engine-starting performance, this lithium battery delivers the best of both worlds—ultra-long runtime and instant cold-weather starting power, all in a rugged, Group-31 waterproof case.
Key Features:
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Massive 320Ah Capacity
Get all-day, multi-day power for your solar system, RV setup, or boat electronics with up to 6X the usable energy of traditional AGM batteries.
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Dual Purpose: Deep-Cycle + Starting Power
Features 1,000 Cold Cranking Amps (CCA) for confidently starting engines, making it perfect for marine motors, truck batteries, and RV generators.
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Heated for Cold Weather Charging
Built-in automatic heating system allows safe charging in freezing conditions, ensuring year-round usability—even in sub-zero climates.
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Compact Group-31 Footprint
Designed to fit standard Group-31 battery compartments (13.31" x 7.24" x 10") with a slightly wider top (15.04" x 7.60" x 9.96")—ideal for direct replacement installs.
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LiFePO4 Technology
Enjoy 8X the lifespan and 6X more power compared to AGM—lasting up to 5,000+ cycles with zero maintenance.
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Waterproof & Weather-Resistant
Built with a reinforced marine-grade plastic case, it's ready for harsh environments and demanding outdoor conditions.
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Fast Charging & Low Self-Discharge
Charges up to 5X faster than lead-acid, with minimal power loss during storage—ideal for seasonal use.
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11-Year Warranty
Backed by Dakota Lithium’s industry-leading 11-year warranty for long-term peace of mind.
Ideal For:
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Marine & Boat Batteries (with starting + trolling functions)
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RV & Camper Vans (off-grid systems & appliances)
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Solar Energy Storage Systems
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Off-Grid Cabins & Tiny Homes
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Overland Vehicles & Backup Power
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Electric Vehicles & Conversions
Specifications
Warranty
Best in Class 11 Year Warranty. That is 10 years more warranty then most lead acid batteries.
Storage Capacity
320 Ampere hours (Ah). Dakota Lithium batteries provide consistent power for all 320 Amp hours. DL LiFePO4 batteries have a flat voltage curve, which means they have a steady power output as the battery discharges. The power output will not dramatically drop like similar sized SLA batteries. You get all the juice down to the last drop.
Cold Cranking Amps
1,000 CCA is adequate to start most boat and large vehicle engines
Voltage
12.8 Volts (Dakota Lithium 12V batteries can be used in series for up to 48V systems)
Size
L: 15.04" x W: 7.60" x H: 9.96" (382mm x 193mm x 253mm) Measurements are to the top of the terminals and includes side handles. See notes in the product description for battery tray and battery box sizing
Group Size 31 & 8D
Group Size 31 and Marine 8D size compatible
Lifespan/Lifecycles
Up to 80% capacity for 5,000 cycles in recommended conditions, 70% capacity at 5,000 recharge cycles. Half-life (50% capacity) of 6,000 - 7,000 re-charge cycles (Typical SLA has 500 cycles). Backed up by an 11 year warranty.
Discharge
Max continuous 200A, 300A for 60 seconds, 1000A for 1 second.LiFePO4 chemistry has a flat voltage curve, meaning this battery will maintain a voltage of >12V for the full discharge cycle in most applications.
Charge
<200 A standard charge, 300A max charge current for <60 sec. 14.4V Recommended, 14.6V Max. A SLA charger may work, but will reduce performance and lifespan of the battery. Even heat technology allows for charging below 32'F. Internal even-heat technology allows for charging below 0°C/32°F
Operating temperature
Ideal for rugged & harsh environments. Much better than SLA or other lithium batteries. -4°F to 176°F (-20°C to 80°C) max optimal operating temps (battery performs well down to -20°F). Internal even-heat technology allows for charging below 32°F. BMS high temp cut off at 167°F / 75°C..
INTERNAL EVEN-HEAT TECHNOLOGY
Increases performance in extreme cold. When charging the battery in temperatures below 0°C/32°F DL's internal heating element will warm the cells to 0°C/32°F. This increases the lifespan, performance, and efficiency of the battery.
Safe & Reliable
Includes active BMS protection circuit that handles cell balancing, low voltage cutoff, high voltage cutoff, short circuit protection and high temperature protection for increased performance and longer life
Terminals and Posts
M8 bolt size included. (Max torque 15 ft. lbs.) (Max 5 ft. lbs. on terminal post adapters)
Marine Grade & Waterproof
Max IP65 water resistance rating. Appropriate for marine environments, not submersible.
Certifications
All batteries are UN38 certified. Dakota Lithium's cells are UL1642 certified and have been tested per IEC62133 standards. Meets all US & International regulations for air, ground, train, & marine transport.
ISO 9001:2015
Dakota Lithium is ISO Certified per 9001:2015 standards, and select models are produced in ISO 14001 certified facilities.
Recommended Charger
12V 50A charger. (Sold Separate) Dakota Lithium 12V batteries should be charged at 14.4 volts. Lead acid chargers will work, but will only charge the battery to 80% of capacity.
