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मराठी 
12.8V314Ah Wall Mounted LiFePO4 Battery
The 12.8V 314Ah Wall Mounted LiFePO4 Battery is a high-capacity 12.8V 314Ah lithium battery designed for residential solar storage, backup power, and off-grid energy systems. With a total usable energy of 4.01kWh, this battery delivers stable, long-lasting performance in a compact, wall-mounted metal enclosure.
Built with BYD LiFePO4 cells, the battery offers exceptional safety, durability, and a cycle life exceeding 6,000 cycles (70% EOL). Integrated Bluetooth and RS485 communication allow real-time monitoring and system integration, making it ideal for modern solar and hybrid energy setups.
This model is commonly searched and applied as a 12V 300Ah LiFePO4 battery, 300Ah 12V lithium battery, or 3.5–4kWh lithium battery for home and commercial energy storage.
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Key Features
- High Energy Capacity – 12.8V314Ah Delivers reliable energy storage equivalent to a 4kWh lithium battery, suitable for extended runtime applications.
- BYD LiFePO4 Battery CellsPremium lithium iron phosphate chemistry ensures long service life, thermal stability, and consistent performance.
- Smart BMS with Bluetooth & RS485Built-in Battery Management System provides protection against overcharge, over-discharge, overload, short circuit, and temperature extremes, with mobile App monitoring.
- Wall-Mounted Sheet Metal HousingDurable metal enclosure with waterproof and dustproof design, optimized for indoor or protected outdoor installation.
- Long Cycle Life≥6000 cycles at 70% EOL, making it a true deep cycle 12.8V 314Ah lithium battery for daily use.
- OEM & ODM CustomizationFactory-direct customization options including branding, communication protocols, and enclosure design.
Core Advantages
Quick Installation
Wall-mounted design significantly reduces installation time and saves floor space.
Smart Battery Management System
Advanced BMS with real-time monitoring improves safety, performance, and system visibility.
High Cycle Life
Designed for long-term use, outperforming AGM and gel batteries in lifespan and depth of discharge.
Optimized Internal Structure
High-density cell layout maximizes usable energy while maintaining compact dimensions.
Deep Customization Capability
OEM/ODM services available for integrators, distributors, and project developers.
99.99% Device Compatibility
Compatible with most 12V inverters, solar charge controllers, and hybrid systems.
Applications (Typical Use Cases)
- Off-grid and hybrid solar systems
- Residential solar energy storage
- Telecom and monitoring equipment
- RV, marine, and mobile power systems
- Backup power for homes and small businesses
Parameters
| Shell Material | Sheet Metal |
| Rated Capacity | 4019Wh |
| Battery | BYD LiFePO4 |
| Lifespan | ≥ 6000 Cycles @70%EOL |
| Nominal Capacity | 314Ah |
| Nominal Voltage | 12.8V |
| Communication Mode | Bluetooth |
| Operating Temperature | -10℃~60℃ |
| Dimensions | 420×350×155mm |
| Weight | 31.25Kg |
Certificate
About us
A decade of energy storage manufacturing excellence.
Residential Solar Energy Storage Battery Solution Manufacturer
TURSAN is a high-tech enterprise integrating R&D, manufacturing, and global sales of lithium battery–based energy storage systems. Founded in 2016, we operate a 20,000+m² production facility producing reliable LiFePO4 power solutions for residential, commercial, and outdoor applications.
Through a strategic partnership with BYD, we co-manufacture larger-capacity, safer, and more environmentally friendly portable power stations and home battery backups. Today we serve global brand owners, distributors, EPC contractors, and project developers in over 60 countries — saving OEM clients up to 20% in annual sourcing cost while meeting the toughest international safety standards.
OEM&ODM Process
Confirm Requirements and Finalise the Solution
We collect all customer specifications: voltage, capacity, dimensions, communication protocol, etc. Then we decide if it is a pure OEM job (build exactly to your drawings) or an ODM job (we provide the design). We issue a clear BOM (bill of materials) and 2D/3D drawings for both parties to sign off, avoiding any later misunderstandings.
Procurement and Incoming Inspection
We purchase all materials according to the BOM: cells, enclosure, brackets, screws, wiring, BMS boards, etc. When goods arrive, we do sampling or 100% inspection. For cells, we measure voltage, internal resistance and check appearance. For structural parts, we check dimensions and hole sizes. Any non‑conforming items are rejected and never go into our warehouse.
Cell Sorting and Matching
We group cells from the same batch by voltage and internal resistance values. We then match cells with the closest parameters into one set (for example, if a string uses 4 cells, the voltage and resistance differences among those 4 must stay within our set limits). This directly affects how long the battery pack will last without performance decay.
Laser Welding and Module Assembly
We fix cells into holders, then laser‑weld the tabs (connectors). We do pull‑force tests on sample weld spots to check strength. After that, we fasten the welded sub‑modules into the enclosure or tray, using torque‑controlled tools to apply the correct tightening force.
BMS Installation and Wiring Connection
We mount the main BMS and slave boards in their designated positions, then plug in all voltage sampling wires and temperature sensors. We always have a two‑person verification of the wiring sequence – this prevents reverse connections that could burn the boards when we power up.
First High‑Voltage Safety Test
We apply high voltage between the positive/negative terminals and the enclosure to measure insulation resistance and withstand voltage. We check for any leakage or breakdown. If this test fails, the module goes back for rework immediately – it does not move forward.
High‑Temperature Standing and Self‑Discharge (K‑Value) Check
We place the modules in a 45 °C room for 24–48 hours. We measure voltage before and after the standing period, then calculate the daily voltage drop (K‑value). Units with excessive drop are rejected because they indicate internal micro‑shorts that could cause early failure later.
Charge/Discharge Aging and Capacity Calibration
We connect the modules to charge/discharge equipment and run several full cycles at the current specified by the customer. During the process, we record actual discharge capacity, charge/discharge efficiency, and the temperature/voltage differences among individual cells. If all data stay within our acceptance limits, we calibrate the final rated capacity. If not, we isolate and analyse the failed units.
Final Inspection, Labelling and Packaging
We re‑measure total voltage, internal resistance and insulation performance. We check appearance for scratches, gaps, or damaged screws. We attach a permanent nameplate (with serial number), UN38.3 hazardous‑goods label, and all required operation warning labels. Then we package the battery with foam or cardboard for shock protection, as per customer requirements, and record the final weight.
Shipment and Document Handover
We verify the shipping quantity, address and consignee. We prepare all accompanying documents: factory test report, MSDS, UN38.3 test summary, and transport condition certificate. We arrange pickup with our logistics partner, and after dispatch we send the tracking number and estimated arrival time to the customer.
Quality Control
FAQ SECTION
Q1: How long will a 314Ah battery last?
A 12.8V 314Ah lithium battery can last anywhere from several hours to multiple days depending on load. With light usage, it can provide power for 1–2 days.
Q2: How long will a 314Ah battery run a refrigerator?
A typical 12.8V or inverter-driven refrigerator can run 24–48 hours on a fully charged 314Ah LiFePO4 battery, depending on efficiency and duty cycle.
Q3: Is a 314Ah lithium battery good for solar systems?
Yes. A 12.8V 314Ah LiFePO4 battery is excellent for solar energy storage due to high cycle life and deep discharge capability.
Q4: How many kWh is a 12.8V 314Ah battery?
This battery provides approximately 4019.2kWh, often rounded and searched as a 4kWh lithium battery.
Q5: Is a 314Ah battery enough for a home?
It is sufficient for partial backup or essential loads. Full-home backup usually requires multiple batteries.
Q6: Can a lithium battery run an air conditioner?
Yes, for short periods. Runtime depends on AC power consumption and inverter capacity.
Q7: Which 12V battery lasts the longest?
LiFePO4 batteries last significantly longer than AGM or gel batteries, often 5–10 times longer.
Q8: What is the downside of lithium batteries?
Higher upfront cost and the need for lithium-compatible chargers, though lifecycle cost is lower.
Q9: What is the 80/20 rule for charging?
Charging between 20% and 80% can help extend lithium battery lifespan, though full charges are safe when needed.
Q10: Is it safe to leave a lithium battery charging overnight?
Yes, when using a compatible charger and BMS-protected LiFePO4 battery.
Q11: How many solar panels are needed to charge a 300Ah battery?
Typically 600W–1000W of solar panels depending on sunlight hours and charging time expectations.
Q12: Do higher Ah batteries last longer?
Yes. Higher Ah means more stored energy, resulting in longer runtime at the same load.
Q13: What is better, AGM or lithium battery?
Lithium batteries offer longer life, lighter weight, faster charging, and deeper discharge capability.
Q14: Can a lithium battery catch fire when not in use?
LiFePO4 batteries are among the safest lithium chemistries and have a very low fire risk when properly managed.
Q15: Is it bad to keep lithium batteries fully charged?
Long-term storage at 100% is not ideal. For storage, 40–60% SOC is recommended.
Q16: How long will a lithium battery hold a full charge?
LiFePO4 batteries have very low self-discharge and can hold charge for months.
Q17: Do I need a fuse between the battery and inverter?
Yes. A properly rated fuse or breaker is strongly recommended for system safety.
Q18: How long will a 4 kWh battery last?
A 4kWh lithium battery can power a 300W load for about 10–12 hours or a 1kW load for around 3–4 hours.
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