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Wattcycle 12V 628Ah Ultra Bluetooth LiFePO₄ Battery - 8038Wh Storage
- Ultra-level Energy: 191Wh/L energy density, 12.8V｜628Ah｜8038Wh, delivering the performance of six batteries at the cost of one—lighter at just 139 lbs and sized at 18.9 × 14.25 × 9.53 inch.
- Ultra-level 300A BMS: 3840W continuous output and 350A peak discharge with full protection against overload, short-circuit, and imbalance—built to drive high-power devices together.
- Ultra-level Scenario Adaptation: Built for Off-Grid, Marine, RV, UPS, Boat & Fishing, and Home Storage—one battery, all scenarios covered.
- Engineered for reliability: unlike running six small batteries in parallel—with higher wiring risks and uneven aging—a single 628Ah pack with a high-grade BMS delivers uniform performance and significantly lower failure rates.
- LiFePO4 EV-A+ Grade Cells: 6000 cycles @80%DOD, over 10 years of durable lifespan.
- Low-temp Cut-off: Automatic shutdown at -4°F to prevent cold damage.
- Bluetooth: Real-time monitoring, one-click control and viewing via smartphone.
- 4S4P: Expandable to 128.6kWh home-level energy storage.
- IP Rating 65: More reliable for outdoor use in rain and dust.
- Shock-resistant and Durable: Full aluminum internal frame for longer lifespan.
- 30% faster Heat Dissipation: Built-in cooling fins for greater stability under heavy load.
We offer free shipping within the continental U.S. via UPS Ground or FedEx, with orders typically processed in 1–2 business days and delivered within 2–5 business days. Large products such as 12V 628Ah, 48V 314Ah batteries, or 12kW inverters are shipped by truck (LTL) and require signature upon delivery. After order confirmation, we will contact you by email to confirm shipment, and transportation arrangements typically take about 48 hours. Please note that we do not ship to Alaska, Hawaii, Puerto Rico, or PO Box addresses. Delivery times may vary due to external factors such as carrier delays or weather conditions.
For complete details, please visit:
Shipping Policy.
Our batteries come with a 5-year warranty, which can be extended to 7 years total upon product registration. Accessories are covered by a 1-year warranty, and like-new (refurbished) batteries include a 1-year warranty.
For full terms, conditions, and claim details, please visit:
Lithium Solar —In this review, the creator tests the Watt Cycle 12.8V 628Ah LiFePO4 battery, highlighting its extremely large capacity—over 8,000Wh of energy storage, which sets a new record for the 12V category. During testing, the battery actually delivered669Ah (106.5% of its rated capacity)at a 60A discharge rate. Internally, it uses solid aluminum busbars and multiple temperature sensors for safety monitoring. A high-current test reached about 257–258A discharge, where the BMS successfully protected the battery by shutting down when MOSFET temperatures approached 140°F, demonstrating effective thermal protection. The battery also passed low-temperature charging protection tests, stopping charge quickly when the sensor was cooled. Overall, the reviewer concludes that the battery uses high-quality cells, a capable BMS with Bluetooth monitoring, and excellent capacity.”
Tech Specs
| Dimensions | 18.9 X 14.25 X 9.53 inch | 480 X 362 X 242 mm |
| Weight | 139 lbs | 63 kg |
| Standard/Maximum Continuous Charging | 125.6A/300A |
| Maximum Continuous Discharging | 300A |
| Over-current Discharge Protection | 310A±10A |
| Over-current Charge Protection | 310A±10A |
| Primary Protection Current Value | 500A@20s |
| Secondary Protection Current Value | 1000A@5s |
| Short-Circuir Current Protection | Support |
| Release Condition | Cut Load |
| Charging High Temperature Protection | 140°F~158°F / 60°C~70°C |
| Discharge High Temperature Protection | 149°F~167°F / 65°C~75°C |
| High Temperature Protection Release Condition | Drop by 41°F~59°F / 5°C~15°C |
| Charging Low Temperature Protection | 23°F~41°F / -5°C~5°C |
| Discharge Low Temperature Protection | -13°F~5°F / -25°C~-15°C |
| Low Temperature Protection Release Condition | Rise by 41°F~59°F / 5°C~15°C |
| Rated Voltage | 12.8V |
| Standard Charging Voltage | 14.6V±0.2V |
| Shipping Charging Voltage | 12.8V~13.5V |
| Shipping Capacity | 50% |
| Cycle Life | 6000@80%DOD |
| Self Discharge Rate | <3%/Month |
| Series & Parallel Connections | 4 Parrallel(Max) 4 Series(Max) |
| Communications | Not Supported |
| Case Material | ABS+PC/UL94 V-0 |
| Storage Temperature | 32°F~140°F/0°C~60°C |
| Terminal Bolt Size | M8 |
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