ETC 228Ah 3.2V Grade A LiFePO4 Prismatic Battery Cell – Slim 54mm Profile – Lightweight 4.2kg for RV, Marine & Space-Saving Solar ESS

Single blue Grade A ETC 228Ah LiFePO4 prismatic cell with high-precision terminals and original QR code for slim RV battery packs.

ETC 228Ah: The Space-Saving Power Solution

The ETC (Wuhu Tianyi) EC-AU228-NAH3L4 is a specialized 228Ah LiFePO4 prismatic cell designed for applications where every kilogram and millimeter counts. Unlike standard 280Ah cells which are typically 72mm thick, this model features a slim 54mm profile, offering a unique advantage for weight-sensitive mobile applications without compromising on industrial-grade performance.

🚀 Key Technical Highlights

⚡ 54mm Thin Profile: This cell matches the standardized height and width of larger cells but reduces the thickness significantly. This allows for a more substantial 12V or 24V pack to fit into the narrower chassis compartments or floor cavities of high-end RVs and marine builds.
⚡ Lightweight Design (4.2kg): Weighing over 1kg less than a standard 280Ah cell, the ETC 228Ah is perfect for mobile projects. A typical 12V pack with these cells would weigh only ~17kg compared to ~22kg for a 280Ah setup, providing better fuel efficiency and easier handling.
⚡ Cost-Effective Performance: Rated for ≥ $\ge 2,000$ cycles, this Grade A cell provides reliable performance for recreational and backup power needs. It represents an excellent entry-level choice for DIY enthusiasts looking for professional brand-name cells at an attractive price point.

🤝 Why Partner with DLCPO?

✅ Verified Grade A Quality: We source authentic cells directly from Wuhu Tianyi. DLCPO verifies every cell for voltage and ultra-low internal resistance (≤ $\le 0.40\text{ m}\Omega$ ) to ensure you receive cells that perform exactly to specification.
🎯 Custom Matching (Free Sorting): Even for budget-friendly cells, balance matters. DLCPO includes a Free Sorting Service to match your cells by voltage and impedance, ensuring your pack charges and discharges evenly for maximum usable capacity.
🌐 Global Delivery Expert: We handle all Class 9 dangerous goods logistics. Our DDP (Delivered Duty Paid) shipping to the USA, Europe, and Brazil makes purchasing international battery components simple, tax-inclusive, and risk-free.

❓ Q:Is this the same physical size as a 280Ah cell?

💡 A:

No. While the height (207mm) and width (174mm) are similar, the thickness is the key difference. This cell is 54mm thick, while a standard 280Ah cell is 72mm thick. They cannot be mixed in the same compression fixture or battery box designed for the 72mm standard.

❓ Q:What is the expected cycle life in a daily use scenario?

💡 A:

The EC-AU228 is rated for ≥ $\ge 2,000$ cycles at standard conditions. This typically provides 5-7 years of service in daily cycling applications (like full-time RV living) or significantly longer in backup/standby solar applications.

❓ Q:Can I use these cells for a 48V golf cart?

💡 A:

Yes, but ensure the continuous discharge current of your motor does not exceed the cell’s limits (typically 0.5C or ~114A continuous for this model). For high-performance racing carts or heavy-duty climbs, a higher C-rate cell might be preferred, but for standard cruising, the 228Ah offers excellent range. 🚀

Main technical specifications

Product Overview:

The ETC (Wuhu Tianyi) 228Ah is a specialized thin-profile LiFePO4 prismatic cell. With a thickness of just 54mm (compared to the standard 72mm of 280Ah cells), it offers a high capacity of 228Ah in a compact form factor, ideal for space-constrained RV and marine battery banks.

Parameter	Specification
Brand	ETC (Wuhu Tianyi)
Model Type	EC-AU228-NAH3L4
Cathode Material	LiFePO4 (LFP)
Nominal Capacity	228 Ah
Nominal Voltage	3.2 V
Operating Voltage	2.5V ~ 3.65V
AC Impedance (1kHz)	≤ 0.40 mΩ
Dimensions (WTH)	173 * 54 * 207 mm
Weight	4.2kg ± 0.21kg
Cycle Life	≥ 2,000 Cycles
Shell Material	Aluminum
Operating Temperature	Charge: 0~45°C \| Discharge: -20~50°C
Sorting Service	Free (Included)

Drawing

Applications

Compact RV Batteries: 54mm thickness saves 25% space compared to 72mm cells, allowing more capacity in tight spots.
Marine House Banks: Lightweight (4.2kg) and reliable power for boat lighting and appliances.
Backup Power: Cost-effective solution for UPS and emergency lighting systems.
Portable Power Stations: High density and slim form factor are perfect for DIY solar generators.

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 backup and recreational use. For continuous daily deep cycling (10+ years), consider our 8000-cycle ETC 280Ah model.