ETC 277Ah 3.2V Grade A LiFePO4 Prismatic Battery Cell – High-Power 2C Pulse 554A – Standard 280Ah Size for RV, Solar ESS & Industrial Traction

Group of Grade A ETC 277Ah LiFePO4 prismatic cells with laser-welded terminals and scannable QR codes for high-power RV and solar builds.

ETC 277Ah: The High-Power 280Ah Alternative The ETC (Wuhu Tianyi) 277Ah cell offers a compelling combination of high capacity and exceptional power output. Designed to match the physical footprint of standard 280Ah cells, it provides a powerful, cost-effective solution for users who need both substantial energy storage and the ability to handle heavy surge loads without the premium price tag.

🚀 Key Performance Features

⚡ Massive 554A Pulse Power: While most storage cells are limited to 1C discharge, the ETC 277Ah is engineered to deliver a 2C pulse (554 Amps) for up to 3 minutes. This makes it incredibly resilient against voltage sag when starting heavy inductive loads like air conditioners, well pumps, or electric motors.
⚡ Standard 280Ah Dimensions: Measuring 174.6mm x 71.8mm x 207.1mm, this cell fits seamlessly into existing compression fixtures, server rack batteries, and DIY enclosures designed for the 280Ah form factor.
⚡ Economical Capacity: With a nominal capacity of 277Ah, it offers essentially the same usable energy as a 280Ah cell (~886Wh vs ~896Wh) but often at a more attractive price point, making it an excellent value for budget-conscious builds.

🤝 Why Partner with DLCPO?

✅ Genuine Specifications: We clearly distinguish between our premium 8000-cycle ESS cells and these high-value 2000-cycle power cells. DLCPO ensures you get exactly what you pay for—authentic ETC Grade A stock.
🎯 Professional Sorting Service: Large capacity cells must be perfectly matched to ensure pack longevity. We provide a Free Sorting Service, grouping cells by voltage and internal resistance to ensure your large battery bank remains balanced and efficient.
🌐 Global Logistics Expertise: Shipping heavy battery pallets requires specialized knowledge. Our DDP (Delivered Duty Paid) service to the USA, Europe, and Brazil covers all shipping, customs, and hazardous goods fees, delivering power straight to your door.

❓ Q:Is 277Ah the same as 280Ah in real-world use?

💡 A:

Practically speaking, yes. The difference in total energy is less than 1.1%. In a standard 16S 48V system, the difference is negligible for real-world usage, while the cost savings are often significant.

❓ Q:Can I use this for a residential solar powerwall?

💡 A:

Yes. While rated for ≥ $\ge 2,000$ cycles (vs 6,000+ for our ultra-premium cells), this still represents 5-7 years of daily cycling. It is a great choice if you want high capacity on a budget or have intermittent usage (like a cabin or RV).

❓ Q:What busbars fit this cell?

💡 A:

Since it uses the standard 280Ah casing (72mm terminal spacing), it uses standard 280Ah flexible busbars. These are widely available and typically included with your order from DLCPO to ensure low-resistance connections. 🚀

Main technical specifications

Product Overview:

The ETC (Wuhu Tianyi) 277Ah is a high-power prismatic LiFePO4 cell. Sharing the standard dimensions of popular 280Ah cells, it offers a cost-effective high-capacity solution with an impressive 554A (2C) pulse discharge capability, ideal for heavy-load inverters and traction systems.

Parameter	Specification
Brand	ETC (Wuhu Tianyi)
Model Type	EC-AU277-CLH3L0
Cathode Material	LiFePO4 (LFP)
Nominal Capacity	277 Ah
Nominal Voltage	3.2 V
Operating Voltage	2.0V ~ 3.65V
AC Impedance (1kHz)	≤ 0.40 mΩ
Standard Discharge	138.5A (0.5C)
Max Pulse Discharge	554A (180 Seconds)
Dimensions (WTH)	174.6 * 71.8 * 200.4 mm
Weight	5.35kg ± 0.27kg
Cycle Life	≥ 2,000 Cycles
Sorting Service	Free (Included)

Drawing

Applications

Off-Grid Inverters: 554A pulse capability easily handles startup surges from AC units and pumps.
280Ah Box Replacement: Dimensions (174x72x200mm) fit perfectly in standard 280Ah DIY cases.
Electric Utility Vehicles: High current discharge suitable for sightseeing cars and forklifts.
Marine House Banks: Large capacity supports extended off-shore power needs.

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: Standard Cycle Life (≥2000). Ideal for applications needing high power pulses rather than ultra-long continuous cycling. Max Pulse: 554A (3 mins).