DEKA Duration DD300-12 300Ah 3.6kWh 12V LiFePO4 Monobloc Battery

Why Choose the 12V 300Ah LiFePO4 Battery for Reliable Energy Storage The Deka Duration DD300-12 is a 12V 300Ah LiFePO4 Monobloc Battery built on Lithium Iron Phosphate chemistry with a fully integrated Battery Management System (BMS). Rated at 300Ah with 3.6kWh of usable energy, it is engineered for high-capacity applications that demand deep, repeated cycling — including off-grid solar storage, large RV and marine house loads, golf carts, and home backup power systems — all in a sealed, IP67-rated, fire-resistant package. Key Specifications Specification Value Voltage 12V Capacity 300Ah Usable Energy 3.6kWh Chemistry LiFePO4 (Lithium Iron Phosphate) Manufacturer Part # DD300-12 Dimensions (L×W×H) 19.69 × 10.43 × 9.2 in (500 × 265 × 232.4 mm) Weight 81.8 lbs (37.1 kg) IP Rating IP67 (Waterproof & Dustproof) Cycle Life 6,000 cycles at 80% DoD Usable DoD 100% Efficiency 99% Self-Discharge 3% per month Internal Resistance <30mΩ Built-in BMS Internal Parallel/Series Config Up to 16 in Parallel or 4P×4S US Made Yes Charging Specifications Parameter Value Recommended Charge Current 150A Max Charge Current 300A Absorption Voltage 14.2–14.6V Float Voltage 13.6–13.8V Absorption Time 60 minutes per 100Ah BMS Cell Balancing Voltage Range 13.4–14.6V Temperature Compensation Not Required Charge Temperature Range 32°F to 140°F (0°C to 60°C) Discharging Specifications Parameter Value Recommended Discharge Current 150A Max Continuous Discharge 300A Peak/Surge Current 1,000A for 5 seconds Discharge Temperature Range -4°F to 140°F (-20°C to 60°C) Recommended LVD 11–11.6V BMS Discharge Voltage Cut-Off 10.6–11V Reconnect Voltage 11.8–12.2V Short Circuit Protection 1200A / 500µs Temperature Specifications Parameter Value Operational Temperature -4°F to 140°F (-20°C to 60°C) Storage Temperature 59°F to 95°F (15°C to 35°C) BMS High Temp Cut-Off 149°F (65°C) BMS Reconnect (Charge) 113°F (45°C) BMS Reconnect (Discharge) 122°F (50°C) Certifications UN38.3, UL 1973 Recognized Component, IEC62619, UL9540A, UL1642, CE, UN3480 Class 9 Key Applications Solar Energy Storage: Off-grid cabin, van build, or residential solar backup — 3.6kWh per unit, scalable up to 16 units in parallel. Golf Carts: High surge current, 100% usable DoD, and 6,000-cycle life — a direct upgrade over lead-acid. RV House Loads: Powers lights, appliances, inverters, and electronics with zero maintenance. Marine Applications: IP67-rated sealed construction handles moisture, vibration, and tilt. Home Backup & UPS: Dependable standby power for inverter-based home battery backup systems. BMS Protection Features Overcharge protection Over-discharge protection Short circuit protection (1200A / 500µs) High-temperature cutoff at 149°F (65°C) Automatic reconnect once safe conditions are restored Fire-rated ABS PC casing — IP67 waterproof and dustproof Warranty Backed by Deka's manufacturer warranty. As an Authorized Deka Distributor, Solar Cellz USA provides genuine products with full manufacturer warranty support. Documents 📄 Datasheet (PDF) 📄 Installation Manual (PDF) High-Capacity Power for Demanding Applications The DEKA Duration DD300-12 is a 12V 300Ah LiFePO4 battery built to deliver dependable energy storage for a wide range of power needs. With 3.6kWh of usable capacity, it is designed for users who want long-lasting performance, stable output, and efficient power delivery in one compact monobloc unit. This battery is well suited for solar storage, marine systems, recreational vehicles, backup power, and off-grid installations. Its lithium iron phosphate chemistry offers a strong balance of safety, durability, and energy efficiency, making it a smart upgrade over traditional lead-acid options. Long Service Life and Consistent Deep-Cycle Performance One of the biggest advantages of this 12V 300Ah LiFePO4 battery is its long cycle life. LiFePO4 technology is known for handling repeated charge and discharge cycles with less wear than conventional battery types. That means more dependable performance over time and fewer replacement costs. The DD300-12 is designed for deep-cycle use, allowing it to support demanding energy loads while maintaining stable voltage. This makes it an excellent choice for applications that require daily cycling, such as solar energy systems and mobile power setups. Users can count on consistent output and reliable operation in real-world conditions. Safe, Efficient, and Easy to Integrate The DEKA Duration DD300-12 combines safety and efficiency in a practical monobloc design. LiFePO4 batteries are valued for their thermal stability and reduced risk compared with many other lithium chemistries, giving users greater peace of mind during operation. The battery also supports efficient charging and discharging, helping reduce energy loss and improve overall system performance. Its 12V format makes integration straightforward for existing power systems, while the monobloc construction simplifies installation and handling. Whether used as a primary storage unit or as part of a larger bank, it offers a clean and reliable solution for modern energy demands. Ideal Choice for Solar, Marine, and Backup Power Needs If you need a durable battery that performs well across different environments, the DEKA Duration DD300-12 is a strong option. Its 12V 300Ah capacity makes it suitable for solar homeowners, boat owners, RV travelers, and businesses looking for dependable backup power. Because it stores significant energy in a single battery unit, it can help reduce system complexity while supporting longer run times. The combination of high capacity, stable lithium performance, and low maintenance requirements makes it a practical investment for users who want dependable power with fewer interruptions. It is a versatile solution for both stationary and mobile energy systems. High-Capacity Power for Demanding Applications The DEKA Duration DD300-12 is a 12V 300Ah LiFePO4 battery built to deliver dependable energy storage for a wide range of power needs. With 3.6kWh of usable capacity, it is designed for users who want long-lasting performance, stable output, and efficient power delivery in one compact monobloc unit. This battery is well suited for solar storage, marine systems, recreational vehicles, backup power, and off-grid installations. Its lithium iron phosphate chemistry offers a strong balance of safety, durability, and energy efficiency, making it a smart upgrade over traditional lead-acid options. Long Service Life and Consistent Deep-Cycle Performance One of the biggest advantages of this 12V 300Ah LiFePO4 battery is its long cycle life. LiFePO4 technology is known for handling repeated charge and discharge cycles with less wear than conventional battery types. That means more dependable performance over time and fewer replacement costs. The DD300-12 is designed for deep-cycle use, allowing it to support demanding energy loads while maintaining stable voltage. This makes it an excellent choice for applications that require daily cycling, such as solar energy systems and mobile power setups. Users can count on consistent output and reliable operation in real-world conditions. Safe, Efficient, and Easy to Integrate The DEKA Duration DD300-12 combines safety and efficiency in a practical monobloc design. LiFePO4 batteries are valued for their thermal stability and reduced risk compared with many other lithium chemistries, giving users greater peace of mind during operation. The battery also supports efficient charging and discharging, helping reduce energy loss and improve overall system performance. Its 12V format makes integration straightforward for existing power systems, while the monobloc construction simplifies installation and handling. Whether used as a primary storage unit or as part of a larger bank, it offers a clean and reliable solution for modern energy demands. Ideal Choice for Solar, Marine, and Backup Power Needs If you need a durable battery that performs well across different environments, the DEKA Duration DD300-12 is a strong option. Its 12V 300Ah capacity makes it suitable for solar homeowners, boat owners, RV travelers, and businesses looking for dependable backup power. Because it stores significant energy in a single battery unit, it can help reduce system complexity while supporting longer run times. The combination of high capacity, stable lithium performance, and low maintenance requirements makes it a practical investment for users who want dependable power with fewer interruptions. It is a versatile solution for both stationary and mobile energy systems.