Wattcycle 12V 628Ah Ultra Bluetooth LiFePO₄ Battery - 8038Wh Storage
Wattcycle 12V 628Ah Ultra Bluetooth LiFePO₄ Battery - 8038Wh Storage - 1 Pack is backordered and will ship as soon as it is back in stock.
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Shipping Service
Shipping Service
Thank you for choosing WattCycle for your LiFePO4 battery needs! We understand that getting your batteries quickly and safely is important to you. This policy outlines the shipping process for WattCycle orders.
Destinations:
- We only ship orders to Continental
- Currently we DO NOT ship to Alaska, Hawaii, and Puerto Rico.
- Please do not use PO Box addresses, which are not within the delivery range of FedEx. If you accidentally use such addresses, please contact us to change them in time to avoid delays in delivery.
Shipping Fee:
- FREE shipping on all orders
- Shipping method: UPS Ground & Fedex
Shipping time:
The time frame of an order delivery is divided into two parts:
- Processing time: 1-2 business days
- Shipping time: 2-5 business days
- The shipping will delay for some objective or uncontrolled reasons. We will notice our customer ahead for delays.
Tracking Your Order:
- Once your order ships, you will receive a confirmation email with a tracking number. You can use this tracking number to track the progress of your shipment on the carrier's website.
Disclaimer:
- While we strive to meet the estimated delivery times provided, these are estimates and actual delivery times may vary depending on factors beyond our control, such as carrier delays or weather conditions.
Changes to This Policy:
- We reserve the right to modify this Shipping Policy at any time. We will post any changes to this policy on our website.
We appreciate your support! If you have any questions about our shipping policy, please feel free to contact us at service@wattcycle.com.
Warranty Policy
Warranty Policy
WattCycle Warranty Policy
Thank you for choosing WattCycle. This warranty policy applies to all products purchased through official WattCycle channels and authorized distributors. Please read this policy carefully before installation and use.
I. Warranty Commitment
WattCycle warrants to the original consumer that under normal use conditions, products shall be free from defects in material and workmanship from the date of original purchase.
1. Warranty Period
|
Product Category |
Specific Model/Series |
Base Warranty |
Extended Warranty (with Registration) |
|
LiFePO4 Batteries |
All new battery models |
5 years |
2 years (7 years total) |
|
Like-New Products |
All like-new models |
1 year |
— |
|
Battery Cells |
All models |
No warranty |
— |
|
Accessories |
Chargers, inverters, controllers, wiring cables, etc. |
1 year |
— |
Note: Extended warranty must be activated through product registration on the official WattCycle website within 3 months of purchase.
2. Warranty Period Calculation
- The warranty period begins from the original consumer’s purchase date.
- Valid proof of purchase (order screenshot, invoice, etc.) is required to establish the purchase date.
- Repaired or replaced products do not extend the original warranty period, which remains based on the original purchase date.
II. Warranty Claim Process and Fees
1. Claim Process
- Step 1: Contact WattCycle Customer Service (service@wattcycle.com), describe the issue, and provide proof of purchase.
- Step 2: Our technical team will contact you within 24-48 hours to assist with troubleshooting.
- Step 3: Once the issue is confirmed as a quality defect, customer service will provide a Return Merchandise Authorization (RMA) number and return instructions.
2. Fee Responsibility Rules
|
Scenario |
Resolution |
Shipping Responsibility |
Notes |
|
Quality issue (within 6 months) |
Free replacement/refund |
WattCycle covers shipping costs |
Requires quality defect confirmation, valid proof of purchase, within warranty period. |
|
Quality issue (after 6 months, within warranty) |
Free replacement |
WattCycle covers shipping costs |
Requires quality defect confirmation, valid proof of purchase, within warranty period. |
|
Personal reason (return within 30 days) |
Return for refund |
Customer bears return shipping |
Original packaging intact, product in good condition. Warehouse restocking fees will be charged. |
|
Personal reason (return after 30 days) |
Return for refund |
Customer bears two-way shipping |
Warehouse restocking fees and depreciation fees will be charged. |
|
Wrong item shipped / Missing item / Transit damage |
Free replacement |
WattCycle covers shipping costs |
/ |
|
Order cancellation (before shipment) |
Refund |
No shipping charges incurred |
/ |
|
Over 6 months (non-quality issues) |
Returns not accepted |
/ |
/ |
3. Refund Policy
- Refunds are applicable only for quality issues reported within 6 months of purchase. Quality issues identified after 6 months will be resolved through product replacement.
- The refund amount will be calculated after final verification, deducting any applicable fees, and returned via the original payment method.
- Refunds will be processed via the original payment method within 3-5 business days after receipt and inspection of the returned product.
III. Warranty Exclusions (Limitations of Liability)
This warranty does not apply to damage or malfunction caused by:
1. Accidents and Force Majeure
- Accidents, abuse, misuse, or negligence
- Natural disasters such as fire, flood, lightning, earthquakes, extreme temperatures
2. Improper Use and Installation
- Failure to follow installation, operation, or maintenance instructions in the product manual
- Voltage/current mismatch, reverse polarity connection
- Use of incorrect fuses or undersized cables
- Series or parallel connections exceeding permissible limits (e.g., systems exceeding 48V)
- Mixing with other battery brands
3. Unauthorized Modifications or Repairs
- Any disassembly, modification, or repair by unauthorized personnel
- Altered, damaged, or removed serial numbers
4. Normal Wear and Tear and Commercial Use
- Cosmetic wear or scratches from normal use.
- Natural capacity degradation over time (normal aging).
- Use exceeding the product’s designed cycle life or technical specifications.
5. Long-Term Inactivity
- Damage resulting from failure to perform periodic charging maintenance for over one (1) year.
6. Other
- Inability to provide valid proof of purchase.
- Products that have been fully refunded through other means.
IV. Final Provisions
- WattCycle reserves the right of final interpretation of this warranty policy.
- This policy may be revised periodically. All changes will be published on our official website.
Contact Information:
📧 Official Customer Service Email: service@wattcycle.com
🌐 Official Website: www.wattcycle.com
Wattcycle 12V 628Ah Ultra Bluetooth LiFePO₄ Battery - 8038Wh Storage
If this battery is too large, we recommend the 12V 314Ah BT (300A BMS) as a better option. 👉 View more >>
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
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 delivered 669Ah (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.”
WattCycle 12V 628Ah Ultra Deep Cycle Lithium Battery
Experience industry-leading energy density with the WattCycle 12V 628Ah Ultra Lithium Battery, engineered to deliver exceptional performance and reliability. Incorporating EV-grade A+ cells, a robust 300 A BMS with configurable over-current protection, and expandable 4 P × 4 S scalability for up to 128.61 kWh, this 12V 628Ah Ultra Lithium Battery sets a new benchmark in power storage. Protected by intelligent low-temperature cutoffs and backed by a 5 + 2 year warranty, it thrives in harsh environments while Bluetooth 5.0 monitoring ensures real-time visibility of voltage, state of charge, and temperature. With double the capacity of comparable units and an industry-leading 5,000–15,000 cycle lifespan, the WattCycle 12V 628Ah LiFePO4 battery delivers long-term value for the most demanding applications.
Advanced Wireless Control
Equipped with Bluetooth 5.0, the WattCycle APP transforms your smartphone into a command center for the 12V 628Ah lithium battery. With a few taps, you can remotely initiate or suspend discharge, verify system health, and monitor critical metrics—voltage, current draw, and cell temperature—in real time. Parameters such as the 300 A continuous discharge limit and peak over-current cutoff can be fine-tuned on the fly, ensuring your WattCycle 12V 628Ah LiFePO4 battery operates precisely to your requirements. This level of oversight delivers confidence and convenience, whether you’re managing an off-grid solar array, marine system, or RV power pack.
Extreme-Environment Protection
Built to withstand the harshest conditions, the WattCycle 12V 628Ah Ultra lithium battery employs intelligent thermal safeguards that automatically pause charging below 32 °F (0 °C) and only resume once ambient temperatures exceed 41 °F (5 °C). In even more severe cold, discharge is halted below –4 °F (–20 °C) to prevent cell damage. Once the environment returns to safe thresholds, the system seamlessly restores full functionality—ensuring your 12V 628Ah Ultra Lithium Battery delivers uninterrupted power whether you’re braving sub-zero winters or scorching summer heat.
Decade-Long Backup Endurance
EV grade A+ LiFePO4 calls have a longer lifespan, better-refined manufacturing, and contain more energy per cell. Engineered for unwavering reliability, the WattCycle 12V 628Ah lithium battery delivers over a decade of continuous backup power, ensuring mission-critical systems stay online through countless cycles. This exceptional longevity means your investment in the 12V 628Ah Ultra Lithium Battery pays dividends year after year, with minimal capacity fade and maximum uptime for residential, commercial, and industrial applications.
Superior Performance vs. Lead‑Acid
Unlike conventional lead‑acid designs, the WattCycle 12V 628Ah Ultra Lithium Battery is encased in UL94 V‑0 flame‑resistant ABS+PC housing and carries an IP65 ingress rating, delivering industry‑leading fire safety and protection against dust and water. This rugged enclosure means you can install it in harsh industrial settings, dusty warehouses, or aboard marine vessels with confidence—environments where traditional batteries often fail or require frequent maintenance. Coupled with the inherent maintenance‑free LiFePO4 chemistry, which eliminates watering and minimizes self‑discharge, this robust design lowers your total cost of ownership and guarantees reliable power delivery when you need it most.
Modular High-Capacity Configuration
Each WattCycle 12V 628Ah Ultra LiFePO4 battery stacked individual battery delivers 8038.4Wh of energy. For projects demanding even greater power, 16 batteries in 4P4S can create a 51.2V 2512Ah system that unleashes a colossal 128.61 kWh of energy. With a truly gigantic energy capacity, this system easily supports any energy demands. Whether you’re expanding a commercial backup system or building a residential microgrid, the 12V 628Ah Ultra Lithium Battery adapts without compromising reliability or performance.
Versatile Fast-Charge Options
Use the WattCycle 14.6 V 80 A charger specifically designed for LiFePO4 battery, which fully charges the battery in just 7.85 hours. With a faster charging rate than traditional lead-acid batteries it provides a better using experience. In addition, 3 other charging options, including solar panel, alternator and generator, suit your different charging needs.
Broad Application Spectrum
The WattCycle 12V 628Ah lithium battery excels in a wide range of settings—from reliable home energy storage and remote off‑grid microgrids to demanding marine environments and long‑haul recreational vehicles. In critical infrastructure such as UPS backup systems and telecommunications sites, its consistent output and intelligent protection features minimize downtime and maintenance. Whether you’re powering a vacation cabin, outfitting a commercial solar array, or ensuring uninterrupted operation aboard a vessel, the 12V 628Ah Ultra Lithium Battery delivers the robust performance and dependability that modern applications require.
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 |
Let customers speak for us
Exactly as described, includes comms cable and battery cables, screen is easy to read, appears to be accurate ah rating. Quality case. Excellent packaging (thick cardboard box with protective card edge strips with dense foam to cushion movement).
Only improvements they can make are instructions don't explain how to mount the rack and handles but does talk about not included stacking kit mounting. And the app isn't particularly well thought out. I understand it's a reskin of the BMS manufacturers app, but it could be a lot better with very little changes.
But overall 9/10, exactly what I needed at the price I needed.
I haven't had the battery long enough to see battery full potential and charging times. Soon though.
Bought this second battery to use in series with the first battery to make 24V battery bank to run my EG4 direct solar 12,000 Btu 120V ac mini split overnight. I can air condition 600 square foot area with just 2-12.8V 280ah batteries in serious. Although we did another video where we ran this mini split overnight with just one WattCycle 12.8V battery and a 120V ac output inverter Keeps area 600 sq ft area 76-78 degrees overnight even with it being 116 degrees outside yesterday. Still have 40-50 percent state of charge left in batteries in the morning when the battery bank is charged up again. I will definitely buy more WattCycle batteries. Have been using for several months now, extremely reliable for me. Highly recommend the WattCycle batteries.
Batteries arrived in good shape & well packed. Came with short & longer bolts which was helpful. I installed 4 of them in a boat as the primary house side. They replace 4 each 210 AHr AGM batteries that were half again bigger and twice as heavy (120 lbs each) as these ~60 lb 314 AHr LifePO4 batteries. This tripled my house capacity & removed 240 lbs of the weight. I added 250A MRBF Fuses to each +positive battery, as well as a 350A Class-T fuse on the overall DC+ side. Additionally, I added a Victron 500A Waterproof SmartShunt to monitor the charge/discharge levels. For charging, I added a Victron Orion XS 50A DC to DC charger for the alternator, and a 40A LifePO4 AC to DC Charger with a remotely activated plug. So far, the batteries seem to be working as advertised.
Had a few issues with shipping due the batteries being so heavy, may have been dropped by FedEx but WattCycle shipped out a replacement. Can’t fault the customer service. Just finished putting my server rack together before wiring it to the inverter.
I needed longer battery life, my old 100ah battery just wasn’t cutting it. With this battery I can run my fridge/freezer 3 times longer without worrying about running low on battery life.
This harness takes all the guess work out of linking your batteries in a series. Just connect all the wires up and plug the ends in and it’s done. They also come with really nice heat shrink connectors to hook up to your main power wires. 100% a must have for a 36v system.
Use to charge Wattcycle 280. Charges in reasonable time. Helpful display to match my Victron shunt and Bluetooth from battery. Added inline heavy duty on/off power switch to better control charging cycle.
Very well constructed, packaged, and documented battery.
