The AIMS Power 12V 300Ah LiFePO4 Battery is a high-capacity lithium iron phosphate battery designed for RVs, boats, golf carts, commercial vehicles, off-grid systems, battery backup power, and other properly sized 12V stored-power applications. With 12.8V nominal voltage, 300Ah nominal capacity, and 3840 watt hours, this battery supports larger energy storage needs while maintaining a compact Group 8D format. It includes a built-in heater, wake-up function, Bluetooth monitoring, state-of-charge LED indicators, smart BMS protection, and an IP65-rated splashproof design. The built-in heater is triggered when a charger is connected in low-temperature conditions, helping support cold-weather charging. This battery is not intended for use as a starting battery and should be used with approved LiFePO4 charging equipment.
This AIMS Power lithium battery provides 300Ah capacity and 3840 watt hours for properly designed 12V power systems. Its LiFePO4 chemistry supports stable output voltage, long cycle performance, and lighter weight compared with many traditional lead-acid battery options.
The built-in heater supports charging in cold conditions when an external charger is connected, while the wake-up function helps recover the battery from low-voltage protection conditions when used according to AIMS instructions. These features help support cold-weather use and battery recovery without relying on unsupported charging methods.
Bluetooth monitoring allows users to review battery status through the AIMSBATC app, including voltage, current, state of charge, cycles, temperature, remaining capacity, and other battery data. The LFP12V300A model includes state-of-charge LED indicators for quick battery status visibility.
The integrated smart BMS supports cell balancing and protection against short circuit, overcharge, over-discharge, low and high temperature, over-current, and high-voltage conditions. The ABS+PC battery case and IP65 rating provide added splash and dust resistance for suitable installations.
This 12V 300Ah LiFePO4 battery is designed for larger stored-power applications where lithium capacity, built-in cold-weather charging support, Bluetooth visibility, and smart BMS protection are important system considerations.
With 3840 watt hours, a Group 8D footprint, IP65-rated housing, ABS+PC case construction, and built-in state-of-charge indicators, the LFP12V300A supports properly designed RV, marine, commercial vehicle, and off-grid battery systems.
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Contact Us for a Quote| Brand | AIMS Power |
| Model / SKU | LFP12V300A |
| Product Type | LiFePO4 Lithium Battery |
| Nominal Voltage | 12.8V |
| Nominal Capacity | 300Ah |
| Watt Hours | 3840 watt hours |
| Expected Cycle Life | >3500 cycles with 1C charge and discharge rate at 77°F, 80% DOD |
| Charge Method | Smart charger, constant current, constant voltage |
| Charge Voltage Range | 14.2V–14.6V, max 14.6V |
| Continuous Charge Current | 200A continuous |
| Continuous Discharge Current | 200A continuous |
| Discharge Current | 230A for 15 seconds; 300A for 2 seconds; 200A continuous |
| Charge Temperature | 32°F to 113°F; built-in heater activates in low temperatures when charger is connected |
| Discharge Temperature | -4°F to 131°F |
| Storage Temperature | -4°F to 131°F |
| Self-Discharge | <3% per month when stored at 50% SOC |
| High Voltage Cut-Off | 14.8V +/- 0.2V |
| Discharge Cut-Off Voltage | 11.2V +/- 0.5V; no power below 10V; wake-up feature may allow charging below 10V; below 7V requires applying a charge |
| Group Size | 8D |
| Battery Post Size | M8 5/16" |
| Dimensions | 21.46" L x 10.35" D x 10.59" H with terminals |
| Weight | 71.7 lbs |
| Shipping Weight | 73.5 lbs |
| Communication | Bluetooth |
| Display | State-of-charge LED indicators |
| Heater | Built-in, triggered when charging in low temperatures |
| Sleep Mode | Yes, optional |
| Cell Balancing | Yes |
| Protection Features | Short circuit, overcharge, over-discharge, low and high temperature, over-current, low and high voltage protection |
| IP Rating | IP65 |
| Battery Case | ABS+PC, extra strong |
| Cell Certifications | UL1973, ROHS, UN38.3 |
| UPC | 840271008776 |
| Shipping Note | Ships freight due to DOT regulations |
| Applications | RVs, boats, golf carts, commercial vehicles, off-grid systems, battery backup power, and compatible stored-power applications |
| Warranty | 10 year limited warranty against manufacturing defects for eligible purchases from AIMS Power or authorized resellers |
AIMS Power LFP12V104A, LFP12V135A & LFP12V300A LiFePO4 Manual
