Ultra Slim 12V 300Ah LiFePO4 Battery
The LINEX Ultra Slim 12.8V 300Ah LiFePO4 battery provides 3.84kWh in a 944 × 336 × 81mm low-profile enclosure for RV, marine, 4WD, solar and off-grid systems. It supports 150A maximum continuous discharge, 100A maximum charging, more than 6,000 cycles, Bluetooth monitoring and passive balancing. Its 35kg case suits restricted-depth installations where system voltage, current, charger settings, mounting and cable protection have been verified. Final selection should follow the published technical specification.
Key Features
- ✓3.84kWh rated energy at 12.8V and 300Ah
- ✓Ultra-slim 944 × 336 × 81mm enclosure
- ✓150A maximum continuous discharge
- ✓100A maximum charging current
- ✓Bluetooth monitoring and passive balancing standard
- ✓Built-in BMS for voltage, current, short-circuit and temperature protection
- ✓More than 6,000 published cycles
- ✓Optional GPS, CAN, RS485, UART, self-heating and active balancing
Technical Specifications
| Model | 12.8V 300Ah |
| Capacity | 300Ah |
| Cell Type | Prismatic LiFePO4 cells |
| Nominal Voltage | 12.8V |
| Energy | 3840Wh |
| Cycle Life | >6000 |
| Discharging Cut-off Voltage | 9.2V |
| Charge Cut-off Voltage | 14.6V |
| Max. Charge Current | 100A |
| Max. Continuous Discharge Current | 150A |
| Dimensions (MM) | 944*336*81 mm |
| Weight | 35KG |
| BMS Functions | Overcharge / Overdischarge / Overcurrent / Overvoltage / Low Voltage / Over Temperature / Short Circuit |
| Max. Modules in Series/Parallel | 4S/4P |
| Discharge Temperature | -20°C~60°C |
| Charge Temperature | 0°C~55°C |
| Storage Temperature | -20°C~60°C |
| Storage Humidity | 0~90% |
| Standard Feature | Bluetooth, Passive Balancing |
| Optional Feature | GPS, CAN, RS485, UART, Self-Heating, Active Balancing |
| Certification | UN38.3, MSDS, CE |
Product Details
The ultra slim 12V 300Ah LiFePO4 battery stores 3.84kWh in a 944 x 336 x 81mm case and weighs 35kg, so it fits under a van floor or a bench seat without a raised battery box. The 150A BMS covers a 1,500W inverter for short runs.
| Specification | Value |
|---|---|
| Nominal voltage | 12.8V |
| Nominal capacity | 300Ah |
| Rated energy | 3.84kWh |
| Dimensions | 944 x 336 x 81mm |
| Weight | 35kg |
| Max continuous discharge | 150A |
| Max charge current | 100A |
| Charge voltage | 14.6V fast |
| Discharge cut-off | 9.2V |
At 81mm tall this pack fits where two 100Ah cases would need stacking. It suits full-time van builds and off-grid cabins with 400W to 800W of solar. Mount it flat, keep 30mm of air gap under the case and fuse the positive cable within 300mm of the terminal.
The Ultra Slim 12V 300Ah LiFePO4 battery provides 3.84kWh in a 944 × 336 × 81mm low-profile enclosure weighing 35kg. It supports 100A maximum charging, 150A continuous discharge, Bluetooth monitoring, passive balancing and more than 6,000 published cycles. It is designed for projects with restricted installation depth.
Common FAQs
The battery is intended for restricted-depth RV, marine, 4WD, solar and off-grid systems. It provides 3.84kWh of rated energy and up to 150A continuous discharge. Confirm system voltage, load current, operating time, installation space, charger settings and cable protection before selection.
Start with 3.84kWh of rated energy, then apply usable depth of discharge, conversion losses, temperature, cable losses and reserve capacity. Divide usable watt-hours by the measured load in watts for an initial estimate rather than relying on Ah alone.
Confirm the published 944 × 336 × 81mm enclosure and 35kg weight, then allow clearance for terminals, cables, mounting, ventilation and service access. The supporting structure must safely carry the installed battery.
Replacement requires checking nominal voltage, charger profile, alternator or DC-DC charging, inverter settings, low-voltage protection, terminals, dimensions and maximum current. A similar physical shape does not confirm electrical compatibility.
Only when the model specification and BMS support the planned configuration. Use identical batteries with matched age and state of charge, equal cable paths and correctly sized protection. Confirm the maximum supported configuration before installation.
Use the charging, discharge and storage ranges published for the selected model. Charging below the minimum specified temperature is not supported unless the battery provides suitable low-temperature charging protection.
Compare the application load and surge current with the published 150A continuous-discharge limit and any model-specific peak limit. The BMS does not replace correctly sized cables, fuses or breakers and charger settings.
Documentation for UN38.3, CE, RoHS and applicable model certificates is available, with a 5-year warranty. Confirm destination-market requirements and provide the application, quantity and destination with the inquiry.
RV, Marine & Trolling Resources
Use these application pages and guides to check voltage, energy use, charging compatibility, current limits and installation space before selecting a battery.