ETC 200Ah 3.2V Grade A LiFePO4 Prismatic Battery Cell – Slim 54mm Profile – 4000+ Cycles High-Efficiency Power for RV, Marine & Solar ESS

Group of blue Grade A ETC 200Ah LiFePO4 prismatic cells with high-precision terminals and original QR codes for DIY solar storage and RV battery packs.

ETC 200Ah: The Balanced Storage Solution

The ETC (Wuhu Tianyi) 200Ah LiFePO4 cell hits the “sweet spot” for professional energy storage projects. By offering double the capacity of standard 100Ah cells in a single unit, it significantly simplifies system wiring and improves overall pack reliability. Encased in a slim, automotive-grade aluminum shell, it delivers high-capacity storage without the excessive weight penalty of larger 280Ah units.

🚀 Key Technical Highlights

⚡ Reliable Longevity (4,000+ Cycles): Rated for≥ $\ge 4,000$ cycles at standard conditions, this cell offers excellent durability. In a typical daily cycling scenario (like solar storage), this translates to over 10 years of reliable service life before reaching 80% capacity retention.
⚡ Slim 54mm Design: Unlike the bulkier 72mm width of 280Ah cells, this 200Ah model features a slim 53.7mm thickness. This allows for more creative and space-efficient battery box designs, especially in RVs and marine engine rooms.
⚡ Lightweight Efficiency: Weighing just 3.98kg, these cells enable the construction of substantial battery banks that are still manageable for portable or mobile setups. A complete 12V 200Ah (2.56 kWh) pack weighs only ~16kg.

🤝 Why Partner with DLCPO?

✅ Direct Sourcing Integrity: We source authentic Grade A cells directly from the manufacturer, Wuhu Tianyi. This ensures our clients receive fresh stock with original factory QR codes and consistent performance characteristics.
🎯 Professional System Matching: To ensure your 4,000-cycle investment lasts, cell balance is crucial. DLCPO provides a Free Sorting Service, matching every cell by voltage and internal resistance (≤ $\le 0.40 \text{ m}\Omega$ ) to create a harmonized, long-lasting pack.
🌐 Specialized Global Logistics: We are experts in Class 9 hazardous materials logistics. Our DDP (Delivered Duty Paid) service handles all shipping complexities to the USA, Europe, and Brazil, delivering industrial-grade power safely to your door.

❓ Q:Is this better than using multiple 100Ah cells?

💡 A:

Yes. Using 200Ah cells simplifies your build by reducing the number of parallel connections and busbars needed. This results in fewer points of failure, more consistent thermal management, and improved overall system reliability.

❓ Q:Can I use this for a 24V system?

💡 A:

Absolutely. Connecting 8 cells in series creates a high-performance 25.6V 200Ah battery pack, providing approximately 5.1 kWh of usable energy storage—perfect for off-grid cabins or marine propulsion.

❓ Q:What is the maximum discharge current?

💡 A:

The standard discharge is 0.5C (100A), but these power-grade cells are robust enough to handle a maximum continuous discharge of 1C (200A) and peak pulses up to 2C (400A) for short durations. 🔋

Main technical specifications

Product Overview:

The ETC (Wuhu Tianyi) 200Ah is a 3.2V LiFePO4 prismatic cell designed for versatile energy storage. Featuring a slim 53.7mm profile and a solid cycle life of ≥4,000 cycles, it offers a balanced solution for solar, marine, and industrial backup applications.

Parameter	Specification
Brand	ETC (Wuhu Tianyi)
Model Type	EC-AU200-NAH3L7
Cathode Material	LiFePO4 (LFP)
Nominal Capacity	200 Ah
Nominal Voltage	3.2 V
Operating Voltage	2.0V ~ 3.65V
AC Impedance (1kHz)	≤ 0.40 mΩ
Standard Discharge	100A (0.5C)
Dimensions (WTH)	174.6 * 53.7 * 200.4 mm
Weight	3.98kg ± 0.2kg
Cycle Life	≥ 4,000 Cycles
Operating Temperature	Charge: 0~45°C \| Discharge: -20~55°C
Sorting Service	Free (Included)

Drawing

Applications

Residential Solar: 4000 cycles provide over 10 years of reliable service for home storage.
Marine House Power: Slim profile (54mm) allows flexible installation in boat compartments.
Industrial Backup: Reliable 0.5C discharge capability for UPS and emergency systems.
Portable Energy: Lightweight (3.98kg) enables building high-capacity portable power stations.

Warnings & Cautions

1. Avoid overheat in any circumstances. Don’t modify or disassemble the battery. It will be dangerous, and may cause ignition, heating, leakage or explosion.
2. Don’t put cells in overheat circumstances or disposed in fire ,don’t put cells under the sunshine.
3. Don’t short-circuit positive(+) and negative(-) terminals. Keep away from metal or other conductive materials. Jumbling the batteries of direct contact with positive(+) and negative(-) terminals or other conductive materials may cause short-circuit and may even cause fire and explosion.
4. Don’t reverse the positive (+) and negative (-) terminals.
5. Don’t put cells in water or other conductive liquids or let cells absorb a moisture.
6. Don’t impact cells excessively.
7. Don’t solder the battery directly. Excessive heating may cause deformation of the battery components such as the gasket, which may lead to the battery swelling, leakage, explosion, or ignition.
8. Don’t use abnormal cell which has damages by shipping stress, drop, short or something else, and which gives off electrolyte odor.
9. Don’t contact cans directly or with other conductive materials during the using process.
10. Keep away form static circumstances during storage and using.
11. Don’t use cells together with other one-shot batteries and secondary batteries. Don’t use cells together with different packages, types and brands.
12. Stop using and process the cells accordingly when the following circumstances happened：getting hot sharply, smelling, changing colors, deformation or others.
13. If there is leaked electrolyte from batteries, please scrub it away with fresh water to avoid any skin discomfort.
14.Notice: Designed for Energy Storage (0.5C). Max continuous discharge 200A (1C). Ensure cells are compressed for optimal lifespan.