ETC 280Ah 3.2V Grade A LiFePO4 Prismatic Battery Cell – Industry-Leading 8,000 Cycles – Ultra-Low 0.18mΩ Resistance for High-Performance Solar & Home ESS

Four blue Grade A Great Power 135Ah LiFePO4 prismatic cells arranged for a 12.8V battery pack with factory-welded M6 studs.

ETC 280Ah: The Hidden Gem of Long-Life Storage

Produced by Wuhu Tianyi Energy Technology Co., Ltd. (ETC), the LFP280Ah-1P is a high-specification LiFePO4 prismatic cell designed for maximum efficiency and longevity. While sharing the standard 280Ah form factor, its internal chemistry is optimized for extreme durability, ensuring it delivers a lower Levelized Cost of Storage (LCOS) over the lifetime of your solar or backup system.

🚀 Key Performance Advantages

⚡ Industry-Leading 8,000 Cycles: Most standard 280Ah cells are rated for 3,500 to 6,000 cycles. The ETC model pushes this boundary to $\ge 8,000$ cycles, translating to over 20 years of daily service in typical off-grid applications.
⚡ Ultra-Low Internal Resistance ( $\le 0.18\text{ m}\Omega$ ): Efficiency is key to system performance. With an impedance significantly lower than the industry average (~0.25 mΩ), this cell generates less heat and wastes less energy during high-load operations.
⚡ Universal Fitment: Featuring the standardized 174mm x 72mm x 207mm dimensions, these cells are a drop-in replacement for existing 280Ah systems, compatible with most flexible busbars and compression fixtures.

🤝 Why Partner with DLCPO?

✅ Verified Authenticity: We source directly from factory channels to ensure you receive genuine Grade A ETC cells with scannable QR codes, not re-wrapped B-grade stock.
🎯 Precision Matching (Free Sorting): Balance is critical for high-voltage packs. DLCPO provides a Free Sorting Service, matching cells by voltage and internal resistance to ensure your pack is perfectly synchronized from day one.
🌐 Global Logistics Expertise: We handle all complex Class 9 dangerous goods shipping regulations. Our DDP (Delivered Duty Paid) service to the USA, Europe, and Brazil ensures a smooth, tax-inclusive delivery experience.

❓ Q:I haven't heard of ETC/Tianyi, are they reliable?

💡 A:

Yes. Wuhu Tianyi (ETC) was established in 2014 and is a significant player in the Chinese domestic storage market. They are highly regarded for supplying industrial-grade projects where long-term reliability and safety are paramount.

❓ Q:Can I mix these ETC cells with EVE 280Ah cells?

💡 A:

We do not recommend mixing cells from different manufacturers. Even if they have the same capacity, different internal resistance and discharge curves can lead to pack imbalance and reduced system life. Always build whole banks with matched cells.

❓ Q:Do these cells come with busbars?

💡 A:

DLCPO typically includes standard copper busbars and nuts with your order. Because these share the industry-standard terminal spacing, it is very easy to find custom busbars or hardware for any specialized enclosure design. 🔋

Main technical specifications

Product Overview:

The ETC (Wuhu Tianyi) LFP280Ah-1P is a premium 280Ah LiFePO4 cell. It stands out with an ultra-low internal impedance (≤0.18mΩ) and an exceptional cycle life of ≥8,000 cycles, making it one of the most efficient and durable choices for solar energy storage systems.

Parameter	Specification
Brand	ETC (Wuhu Tianyi)
Model Type	LFP280Ah-1P
Cathode Material	LiFePO4 (LFP)
Nominal Capacity	280 Ah
Nominal Voltage	3.2 V
Operating Voltage	2.5V ~ 3.65V
AC Impedance (1kHz)	≤ 0.18 ± 0.05 mΩ
Standard Discharge	140A (0.5C)
Dimensions (WTH)	173 * 54 * 207 mm
Weight	5.3kg ± 0.3kg
Cycle Life	≥ 8,000 Cycles
Operating Temperature	Charge: 0~45°C \| Discharge: -20~50°C
Sorting Service	Free (Included)

Drawing

Applications

Home Energy Storage: 8000 cycles ensure 15-20 years of daily use for solar systems.
Off-Grid Power Walls: Standard dimensions allow easy compatibility with 280Ah DIY battery boxes.
Telecom Base Stations: High reliability and low maintenance requirements ideal for remote sites.
RV & Marine: Efficient charging and discharging with minimal heat generation due to low resistance.

Warnings & Cautions

Avoid overheat in any circumstances. Don’t modify or disassemble the battery. It will be dangerous, and may cause ignition, heating, leakage or explosion.
Don’t put cells in overheat circumstances or disposed in fire ,don’t put cells under the sunshine.
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.
Don’t reverse the positive (+) and negative (-) terminals.
Don’t put cells in water or other conductive liquids or let cells absorb a moisture.
Don’t impact cells excessively.
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.
Don’t use abnormal cell which has damages by shipping stress, drop, short or something else, and which gives off electrolyte odor.
Don’t contact cans directly or with other conductive materials during the using process.
Keep away form static circumstances during storage and using.
Don’t use cells together with other one-shot batteries and secondary batteries. Don’t use cells together with different packages, types and brands.
Stop using and process the cells accordingly when the following circumstances happened：getting hot sharply, smelling, changing colors, deformation or others.
If there is leaked electrolyte from batteries, please scrub it away with fresh water to avoid any skin discomfort. 14.Notice: Terminal posts may require cleaning before busbar installation. Always compress cells to achieve the full 8000 cycle life rating. Max charging voltage 3.65V.