Addressing common industry pain points—such as the complexity of paralleling multiple units for high-capacity users, cluttered wiring, and the inability to power heavy-duty loads—KTAC TECHNOLOGY has developed this 51.2V 628Ah LiFePO4 Battery Pack. It features a proprietary 2-parallel, 16-series cell configuration, delivering a rated storage capacity of 32.154 kWh per unit and a continuous high-current output of 300A. This enables it to directly power high-demand equipment such as heat pumps, EV charging stations, and industrial welders.
Standard features include a proprietary intelligent BMS and a high-power 300A circuit breaker. The unit maintains stable performance even after undergoing 6,000 deep-discharge cycles and supports capacity expansion by paralleling up to 16 units. Furthermore, it holds a comprehensive suite of export safety certifications and offers extensive OEM/ODM customization services. It serves as a highly cost-effective core energy storage solution—an ideal alternative to paralleling multiple smaller-capacity batteries—that significantly simplifies the overall energy storage system installation process.
With a single-unit storage capacity reaching 32.154 kWh, this 51.2V 628Ah LiFePO4 Battery Pack provides an energy volume equivalent to two 314Ah battery units. You no longer need to purchase and stack multiple smaller-capacity batteries; this drastically reduces the number of required cabinets and effectively conserves floor space in equipment rooms—making it perfectly suited for commercial and industrial energy storage projects with limited available area.
Thanks to its integrated, single-unit design, this system requires half the number of busbars, communication cables, and auxiliary wiring materials compared to a setup involving two paralleled 314Ah batteries. This simplifies the overall wiring logic, reduces the time required for electrical installation, and lowers the total implementation budget for the energy storage system by saving on both hardware consumables and labor costs.
The entire energy storage unit is equipped with a single Battery Management System (BMS); operations and maintenance personnel need only monitor data from this single BMS unit, eliminating the need to simultaneously manage parameters across multiple separate devices. This simplifies troubleshooting and routine maintenance procedures, making the system perfectly suited for large-scale residential energy storage and batch-deployed commercial/industrial distributed energy storage projects.
|
Parameter |
Value |
|
Rated Energy |
32.154 kWh |
|
Rated Voltage |
51.2 V |
|
Rated Capacity |
628 Ah |
|
Cell Configuration |
2P16S (Grade-A cells) |
|
Operating Voltage Range |
42V – 58.4V |
|
Rated Charge/Discharge Current |
300A @25±2°C |
|
Max Charge/Discharge |
Current 300A |
|
Charge Temperature |
0~40°C |
|
Discharge Temperature |
-20~40°C |
|
Storage Temperature |
-10~35°C (≤1 month); 25±2°C (≤3 months) |
|
Storage Humidity |
65%±20% RH |
|
Altitude Limit |
≤3000m |
|
Communication |
CAN, RS485 |
|
Parallel Units |
Up to 16 |
|
Net Weight |
260 kg |
|
Dimensions |
440×720×900 mm |
|
Circuit Breaker Rating |
300A |
|
Cycle Life |
6000 cycles @25°C, 80% DOD |
|
Certifications |
IEC62619, UN38.3, CE |
Equipped with Grade-A Lithium Iron Phosphate (LiFePO4) cells from the renowned CORNEX brand, the system utilizes an industry-proven 2P16S (2-Parallel, 16-Series) combination architecture. Backed by the quality assurance of a major cell manufacturer, this design prevents issues such as cell swelling and premature degradation right at the source, making it ideally suited for high-intensity, high-frequency daily charge-discharge cycles.
The 300A charge/discharge current is automatically distributed across two independent cell branches, ensuring that each individual branch carries a load of only 150A. This disperses the load pressure on the cells, optimizes internal temperature uniformity, and prevents premature aging caused by individual cells operating under sustained high loads. Consequently, under high-intensity operating conditions, the system's service life significantly exceeds that of standard single-string battery packs.
The dual-branch parallel configuration inherently provides redundancy. Should a minor anomaly occur in one branch, the BMS can intelligently adjust the load distribution to prevent a complete system shutdown. Compared to traditional 1P (single-parallel) architecture batteries, this 51.2V 628Ah LiFePO4 Battery Pack offers superior resilience against operational risks, making it ideal for commercial and industrial energy storage scenarios requiring continuous, 24/7 operation.
- Supports Simultaneous Operation of High-Energy-Consumption Household Appliances: With a continuous charge/discharge current of 300A, the system can effortlessly power high-demand devices such as home EV charging stations, whole-house underfloor heating systems, water-circulation heat pumps, and swimming pool pumps. This effectively resolves issues related to insufficient load capacity and voltage instability during peak electricity demand periods in large-capacity residential settings.
- Compatible with Industrial Equipment Featuring Transient Surge Loads: Boasting excellent surge-resistance capabilities, the system is compatible with equipment characterized by high instantaneous startup currents—such as welding machines in small workshops, high-power electric tools, and high-pressure pumps for agricultural irrigation—without the need for additional external voltage stabilization accessories.
- Compatibility with High-Power Inverters: Breaking through the current output limitations typically associated with small-to-medium capacity batteries, this unit pairs directly with high-power grid-tied/off-grid hybrid inverters. It eliminates the need for multi-unit parallel clustering to achieve higher capacity, thereby meeting the demanding requirements of high-power energy storage systems and facilitating the deployment of advanced storage solutions.
- Ultra-Long Cycle Life for High-Frequency Operation: Under standard operating conditions—25°C ambient temperature and 80% Depth of Discharge (DoD)—the battery boasts an effective cycle life of up to 6,000 cycles. Designed for high-intensity applications such as commercial/industrial peak-shaving and high-frequency start-stop cycles, it exhibits a remarkably slow rate of capacity degradation, ensuring outstanding long-term economic value.
- Wide Operating Temperature Range for Diverse Climates: The unit supports a discharge temperature range of -20°C to +40°C, making it suitable for the vast majority of countries and regions across temperate, subtropical, and cold climatic zones. Whether deployed in freezing outdoor workshops during winter or in hot, enclosed equipment rooms during summer, it maintains stable discharge performance, meeting all-weather energy storage requirements.
- Robust Metal Casing for Enhanced Physical Protection: The 51.2V 628Ah LiFePO4 Battery Pack features a high-strength, unibody metal enclosure. Offering superior resistance to impact and compression compared to standard plastic-cased batteries, it effectively withstands physical damage caused by transport vibrations and daily bumps—making it ideally suited for installation in demanding environments such as construction sites and farms.
- Maximized Parallel Expansion Capability: The system supports the simultaneous parallel networking of up to 16 individual 51.2V 628Ah LiFePO4 battery units. When fully configured, the total energy storage capacity can exceed 514kWh—sufficient to meet the diverse energy storage needs of various sectors, ranging from high-end single-family residences to medium-sized commercial shops and small-scale manufacturing facilities.
- Low-Barrier Capacity Scaling: A parallel configuration of just four battery units delivers a substantial 128kWh of energy storage capacity. This is more than sufficient to support the full-time, off-grid power requirements of most large-format villas, small studios, and private farms—eliminating the need for a massive upfront capital investment to establish a comprehensive energy storage system.
- Unified Load Distribution: Featuring an upgraded parallel load-sharing algorithm, this system intelligently balances charging and discharging loads when multiple units are connected in parallel. This prevents individual battery units from operating under overload conditions, eliminates common faults such as parallel imbalance and current backflow, and significantly reduces the probability of operational and maintenance failures.
- Multiple International Certifications: The 51.2V 628Ah LiFePO4 Battery Pack holds UN38.3 air transport certification, IEC62619 safety certification specifically for energy storage systems, and CE certification for EU market access. It fully complies with global export regulations for energy storage batteries, boasts a high customs clearance success rate, and is suitable for international trade distribution and engineering projects across numerous countries.
- Inherently Safe Lithium Chemistry: Utilizing highly stable Lithium Iron Phosphate (LiFePO4) material, the battery inherently poses no risk of thermal runaway, spontaneous combustion, or explosion. Its excellent high-temperature resistance makes it ideal for energy storage scenarios located in close proximity to human activity—such as indoor equipment rooms and enclosed utility spaces.
- External High-Power Circuit Breaker: The unit features an integrated, large-capacity 300A DC circuit breaker that combines multiple functions: short-circuit protection, overload protection, and circuit isolation. During routine equipment maintenance or circuit modifications, a single-button operation allows for immediate power disconnection, thereby physically isolating potential electrical safety hazards.
- High-Consumption Residential Energy Storage: Designed for detached villas equipped with high-energy-demand appliances—such as electric vehicles, underfloor heating systems, and pool pumps—this system stores surplus solar energy generated during the day. At night, it centrally supplies power to high-wattage loads, thereby reducing household electricity costs during peak grid demand hours.
- Light Commercial & Industrial Emergency Backup: Suitable for small commercial venues—including community clinics, street-front retail shops, and remote office outposts—a single 32kWh battery unit can sustain critical loads (such as lighting, refrigeration equipment, and office networks) for 8 to 12 hours continuously, providing a robust defense against the risks of sudden power outages.
- Off-Grid Energy Storage for Farms & Workshops: Specifically engineered for solar-powered farms and small processing workshops, this system reliably delivers high-instantaneous current to power irrigation pumps, welding equipment, and power tools. It effectively resolves the challenges associated with operating in remote areas lacking grid infrastructure or in locations where the existing grid supply is insufficient to meet power demands.
- Peak-Valley Arbitrage in Weak Grid Areas: In regions characterized by frequent grid voltage fluctuations and unstable power supply, electricity—sourced from either the utility grid or solar PV systems—is stored during off-peak hours and autonomously discharged during peak demand periods. This strategy serves to both stabilize voltage within the facility and maximize reductions in electricity costs.
One 51.2V 628Ah LiFePO4 Battery Pack reduces parallel busbars and communication cables by half. It also occupies less floor area per kWh and simplifies system monitoring – only one BMS to manage instead of two.
Not recommended. Different capacities and internal resistances may cause uneven charge/discharge. Always use identical models in parallel. However, you can parallel multiple 628Ah units.
The 2P16S configuration splits the 300A current across two parallel cell strings, so each cell handles only 150A. This keeps cell temperatures comparable to a 314Ah pack at 150A. For safety, keep the pack in a ventilated area.
Connect a PC to the BMS via RS485 or CAN using KTAC’s free software. The update takes less than 5 minutes. Remote update is possible if you have a network-connected gateway.
Yes, the 300A DC breaker is a standard mount type. Replacement breakers are available from KTAC or qualified electrical suppliers.
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