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The AIMS Power 12V 300Ah LiFePO4 Battery (LFP12V300A) is a 12.8V lithium iron phosphate battery that stores 3840 watt hours in a Group 8D case. It handles 200A of continuous charge and discharge current and adds a built-in heater for cold-weather charging, a push-button wake-up, Bluetooth monitoring through the AIMSBATC app and a state of charge LED panel.
It's built for demanding RV systems, commercial vehicles, boats, solar and off-grid setups, and battery backup. Each battery measures 21.46 x 10.35 x 10.59 inches with terminals and weighs 71.7 lb. You can order one battery, two batteries with a 1/0 AWG 1 foot cable set, or three batteries.
With 300Ah at 12.8V, one battery holds 3840 watt hours. AIMS rates it for 200A continuous discharge, 230A for 15 seconds and 300A for 2 seconds. Continuous charge current is also rated at 200A, and the battery label lists a recommended charging current of 100A.
AIMS explains that lithium cells can't accept as much charge current at low temperatures without risking capacity loss. When the battery is below 32°F (0°C) and a charger is connected, the BMS turns on the internal heater and turns it off at 50°F (10°C). The heater uses 10A of the charger's current, not battery power, and needs no external wiring.
If the battery is over-discharged, hold the button for 3 seconds to activate the wake-up feature. You don't need to parallel another battery or use a special charger to wake it. AIMS notes that if the battery has dropped below 7V, you'll need a 12V jumper battery to wake it before you connect a charging source.
The AIMSBATC app for Android and Apple devices shows voltage, current, state of charge, charge or discharge state, cycle count, temperature, remaining and full charge capacity, and average time to empty or full. On the battery, an LED panel shows state of charge at 25%, 50%, 75% and 100%, with alarm and run lights next to the power button.
The BMS protects against short circuit, over charge, over discharge, low and high temperature, over current, and low and high voltage, and it balances the cells. AIMS says each cell is fused, so a failed cell is isolated and the battery can keep operating safely. The cells are certified to UL1973, RoHS and UN38.3.
The ABS+PC case is rated IP65, which AIMS describes as splash and dust proof. You can install the battery in any orientation because it won't leak or spill, and AIMS's photos show rope carry handles on the ends of the case.
RV power systems. Run a large 12V inverter and house loads from a single battery, with a heater for charging on cold trips.
Commercial vehicles and equipment. AIMS designed the 300Ah for RV, commercial vehicle and off-grid systems that need steady power over long run times.
Solar and off-grid storage. Store solar energy for a cabin or remote site, using the 2 or 3 battery options for more capacity.
Battery backup. Keep essential loads running through an inverter during outages.
Boats. Use it for house loads on a boat. AIMS says not to use it as a starting battery.
AIMS designed its 12V LiFePO4 batteries as a lighter alternative to lead acid, AGM or gel batteries, with a longer cycle life and a steady output voltage that delivers close to full power until the battery is nearly empty. Don't mix it with other battery types in the same bank.
A single LFP12V300A gives you 3840 watt hours at 12V. The 2 battery option adds a second battery plus a 1/0 AWG 1 foot cable set, and the 3 battery option gives you three matched batteries for a larger bank. Buying them together makes it easier to meet AIMS's rule that connected batteries share the same age and cycle life.
Use a charger made for LiFePO4 batteries. For a single 12.8V battery the maximum charge voltage is 14.6V, and AIMS recommends 14.4V. Constant current chargers are recommended; a constant voltage charger may trip from inrush current, so reset it and keep charging. Hold the end-of-charge voltage until the current drops almost to zero. Don't connect it to an alternator or non-smart charging system unless you're using a voltage regulator.
AIMS supports parallel and series connections. Fully charge each battery first so their states of charge are within 10%, and use only AIMS batteries of the same age and cycle life. Size copper cables and fuses for your system, crimp (or solder and crimp) the cable ends, and torque the M8 terminals to 7.7 Nm. Ask the Outbound Power team to confirm the bank layout for your system voltage.
No. AIMS says the heater only runs when a charger is applied at low temperatures, and it uses charger power, not battery power.
No. AIMS lists Bluetooth communication for the LFP12V300A. CAN and RV-C communication, the digital display and the mounting feet are on the LFP12V135A only.
AIMS describes the two pack as including 1/0 AWG cables, and its photo shows a red and black 1 foot set with ring terminals.
The Bluetooth chip may be asleep to save power. Apply a 10A charge or discharge, then close and reopen the app. The app connects to one battery at a time.
The 2 x Batteries With Cable option includes two batteries and a 1/0 AWG 1 foot cable set, and the 3 x Batteries option includes three batteries. AIMS notes the terminal bolts are packed in a separate bag inside the box.
The AIMS Power 12V 300Ah LiFePO4 Battery gives you 3840 watt hours, 200A continuous current, a built-in heater, push-button wake-up and Bluetooth monitoring in one Group 8D case. If you'd like help choosing between one, two or three batteries or matching a LiFePO4 charger, the Outbound Power team is happy to help.
AIMS Power 12V 300Ah LiFePO4 Battery | Wake-Up Feature | Internal Heater | Bluetooth Monitoring Specifications |
|
|---|---|
| Electrical | |
| Model | LFP12V300A |
| Chemistry | Lithium Iron Phosphate (LiFePO4) |
| Nominal Voltage | 12.8V |
| Nominal Capacity | 300Ah |
| Energy | 3840 watt hours |
| Expected Cycle Life | >3500 cycles with 1C charge and discharge, at 77°F, 80% DOD |
| Self-Discharge | <3% per month (stored at 50% SOC) |
| Charge and Discharge | |
| Charge Method | Smart charger, constant current, constant voltage |
| Maximum Charge Voltage | 14.6V |
| Recommended Charge Voltage | 14.4V |
| Charge Voltage Range | 14.2V to 14.6V |
| Continuous Charge Current | 200A |
| Recommended Charge Current | 100A |
| Continuous Discharge Current | 200A |
| Peak Discharge Current | 230A for 15 seconds, 300A for 2 seconds |
| Discharge Cut-Off Voltage | 11.2V +/- 0.5V |
| High Voltage Cut-Off | 14.8V +/- 0.2V |
| Wake-Up | Push button, hold 3 seconds (below 7V, use a 12V jumper battery) |
| Temperature | |
| Charge Temperature | 32°F to 113°F (built-in heater turns on in low temps) |
| Discharge Temperature | -4°F to 131°F |
| Storage Temperature | -4°F to 131°F |
| Heater | Built-in, triggered with charger |
| Heater On / Off | On below 32°F (0°C), off at 50°F (10°C) |
| Heater Power Source | 10A of the supplied charge current |
| BMS and Monitoring | |
| Protections | Short circuit, over charge, over discharge, low and high temp, over current, low and high voltage |
| Cell Balancing | Yes |
| Cell Fusing | Each cell fused |
| Communication | Bluetooth |
| Monitoring App | AIMSBATC (Android and Apple) |
| Display | State of charge LEDs (25%, 50%, 75%, 100%), alarm and run lights |
| Sleep Mode | Yes, optional |
| Cell Certification | UL1973, RoHS, UN38.3 |
| Physical | |
| Dimensions | 21.46 x 10.35 x 10.59 in (L x D x H, with terminals) |
| Weight | 71.7 lb |
| Shipping Weight | 73.5 lb |
| Group Size | 8D |
| Terminal Post Size | M8 (5/16 in) |
| Terminal Torque | 7.7 Nm |
| Battery Case | ABS+PC |
| Ingress Protection | IP65 (splash and dust proof) |
| Installation Orientation | Any orientation |
| Options on This Page | |
| 1 x Battery | LFP12V300A |
| 2 x Batteries With Cable | LFP12V300A2PK-1/0 1ftset (2 batteries and a 1/0 AWG 1 foot cable set) |
| 3 x Batteries | LFP12V300A3PK |
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