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WattCycle 12V 314Ah Lithium LiFePO4 Leisure Battery
Cold Weather Protection for UK Campervans & Motorhomes：Designed for UK off-grid living, this 12V 314Ah LiFePO4 battery features built-in low-temperature protection, automatically stopping charging below 0°C to protect battery performance during winter camping and cold weather conditions.
200A High Output Lithium Battery for Inverters & Off-Grid Systems：Supports 200A continuous discharge, making it ideal as a high-power 12V lithium battery for motorhomes, caravans, solar power systems, and inverter-based off-grid setups.
12V 314Ah LiFePO4 Battery (4019Wh) for Campervan & Caravan Power Storage：High-capacity 4019Wh lithium leisure battery designed for UK campervans, caravans, and off-grid solar storage systems, offering stable and reliable deep cycle power in a compact form factor.
Built-in Smart BMS Protection System for Safe Lithium Battery Use：Integrated 200A Battery Management System (BMS) with full protection including overcharge, over-discharge, short circuit, temperature protection, and low-temperature cut-off for safe long-term use.
Compact Mini Design for Campervan Battery Compartments：Space-saving 12V lithium battery designed to fit tight motorhome and caravan battery compartments, with dimensions L384 × W194 × H248 mm for easy installation in UK leisure vehicles.
Long-Life Deep Cycle Lithium Battery with EV-Grade Cells：Built with high-quality EV-grade LiFePO4 cells, delivering up to 10,000–15,000 deep cycles for long-term energy storage in solar systems, RVs, and off-grid applications.
Expandable Lithium Battery System for Off-Grid Energy Storage：Supports up to 4P4S configuration, allowing scalable expansion for larger solar battery storage systems, home backup power, and off-grid energy setups.
Multi-Purpose Leisure Battery for Campervans, Caravans & Marine Use：Versatile lithium leisure battery suitable for campervans, caravans, boats, marine systems, solar power storage, and off-grid home backup applications across the UK.
Local UK warehouse, more details in
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: Warranty Policy
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Fast, Free Shipping
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Buy now, pay later
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Hassle-Free Warranty
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Lifetime Customer Support
Independently Tested by MarineHowTo (Rod “RC” Collins) — an ABYC Certified Marine Electrical Systems Specialist with extensive experience in marine energy management systems.
In real-world marine testing, RC found the WattCycle 314Ah BT Mini to be well suited to boating applications, highlighting its strong balance of safety, construction quality, and value for money. He also noted the battery’s solid internal design and build quality, particularly given its entry-level price point.
We appreciate RC’s independent testing and detailed feedback, which help provide customers with practical insights and transparent performance data.
Smarter Monitoring, Wherever Your Battery Is Installed
With Bluetooth 5.0 connectivity, the WattCycle app for iOS and Android allows you to monitor voltage, temperature, and state of charge in seconds.
Wireless monitoring is particularly useful for remote solar systems, off-grid setups, and under-seat or enclosed RV battery installations, making it easier to check battery status without accessing difficult-to-reach compartments.
Simpler Setup. Higher Capacity.
Enjoy 314Ah in a single battery, with less wiring, easier installation, and a more space-efficient design compared with multiple batteries in parallel.
Built Stronger. Runs Cooler.
Designed with reinforced construction, improved cooling, and upgraded copper wiring for greater durability and dependable performance under demanding use.
Scalable Energy Storage
Expand your system as energy demands grow, with support for up to 4S4P configurations (64.3kWh) — suitable for large solar installations and whole-home backup applications.
Technical Specifications
General
| Battery Technology | LiFePO4 |
| Dimensions | With Handles: L384 × W194 × H248 mm Without Handles: L340 × W194 × H248 mm |
| Weight | 27 kg |
| Terminals | M8 Bolts |
| Casing Material | ABS |
| Waterproof Rating | IP65 |
| Certifications | ECE R10, IEC, FCC, CE-EMC, CE-RoHS, CE-Battery, CE-RED, UN 38.3, PSE, METI, |
| Hazard Class | 9 |
| Warranty | 5＋2 Years |
Technical Data
| Nominal Voltage | 12.8V |
| Nominal / Usable Capacity | 314Ah |
| Energy | 4019Wh |
| Cell Balancing | Yes, passive balancing |
| Bluetooth | Bluetooth 5.0 |
| Monthly Self Discharge | ≤ 3% / month |
| Series & Parallel Configurations | Max. 4 in series / 4 in parallel |
Battery Management System (BMS)
| BMS Rating | 200A |
| Max Continuous Output Power | 2560W |
| Over-charge Detection Voltage | 14.4V ± 0.2V |
| Over-discharge Detection Voltage | 10V ± 0.2V |
| Standard Continuous Charge Current | 62.8A (0.2C) |
| Max Continuous Charge / Discharge Current | 200A (1C) |
| Over-current Charge Protection | 210A ± 10A |
| 1st Discharge Over-current | 210A ± 10A @ 10 ± 0.5s |
| 2nd Discharge Over-current | 250A ± 10A @ 1 ± 0.5s |
| BMS High Temperature Cut-off | Charge: 55°C ± 5°C Discharge: 65°C ± 5°C |
| BMS Low Temperature Cut-off | Charge: 0°C ± 5°C Discharge: -20°C ± 5°C |
| High Temperature Recovery | Charge: 50°C ± 5°C Discharge: 60°C ± 5°C |
| Low Temperature Recovery | Charge: 2°C ± 5°C Discharge: -15°C ± 5°C |
Temperature Range
| Charging Temperature | 0°C – 55°C |
| Discharging Temperature | -20°C – 60°C |
| Storage Temperature | 0°C – 45°C |
FAQ
Yes. Our 200 A BMS protects against charging or discharging in unsafe temperatures.
- Charge cutoff: 0 °C – 45 °C
- Discharge cutoff: –20 °C – 60 °C
We recommend using a WattCycle LiFePO4 battery charger, which is specifically designed to meet the unique charging needs of LiFePO4 batteries. Alternatively, you can also charge the battery using photovoltaic solar panels through MPPT or use an inverter with a built-in AC to DC charging function.
Absolutely. LiFePO4 is the most stable lithium chemistry on the market. WattCycle cells are UL-certified and housed in an IP65-rated case. Our internal BMS guards against:
- Over Charge & Over Discharge
- Under Voltage & Over Voltage
- Over Current & Short Circuits
- High Temperature
- Low-temperature Cut-off
No. WattCycle 12V 314Ah LiFePO4 lithium batteries are not intended to be used as starting batteries but energy storage, please do not use them to start any devices.
For engine starts, can use WattCycle 12V 100Ah dual purpose battery, but only for marine. For the car generator, please use a purpose-built starting battery.
Yes—our 12V 314Ah LiFePO4 Battery is designed for seamless solar charging. Simply pair it with an MPPT charge controller and a 1.200W PV array to top up in one sunny day (≈4.5 hrs of peak sun).
Optimal Setup: A 1.200W solar panel bank feeding an MPPT regulator ensures efficient charging of your 12V 314Ah solar battery.
Charge Profile: MPPT controllers adjust voltage/current to maintain the ideal 14,2V – 14,6V range, protecting cell health and maximizing cycle life.
Scalable: Whether you’re building out 12V 314Ah batteries for solar panels in parallel or keeping it simple with one pack, the WattCycle system adapts—no special wiring or firmware tweaks required.
1. Recommended Storage Conditions
- To achieve optimal storage results, LiFePO4 batteries should be kept in a cool, dry place.
- Ideal Storage Temperature: 15°C – 25°C.
Humidity: Keep humidity as low as possible to avoid moisture buildup.
2. Recommended Charge Level During Storage
LiFePO4 batteries should be stored at a partial state of charge (SOC) between 50% and 80%.
Why Avoid Full Charge/Discharge?
- Storing the battery fully charged or fully discharged can stress the cells and lead to gradual capacity loss over time.
- A partial charge helps preserve battery health during storage.
Additional Tips:
- Check Periodically: If storing for extended periods (>3 months), check the SOC every 3–6 months and recharge to 50–80% if needed.
- Avoid Extreme Temperatures: Never store in freezing (<0°C) or excessively hot (>60°C) environments.
Zero maintenance—no watering or equalizing. Just install, register your 7-year warranty, and enjoy consistent, long-lasting power for years to come.
