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The AIMS Power 12V 400Ah LiFePO4 Auxiliary Battery stores 5.12kWh of rated energy in sixteen 3.1V 100Ah prismatic LiFePO4 cells arranged 4S4P. AIMS built it to expand the AIMS Power Onboard All-in-One Solar Generator (AIO-12V), and it can also work as a standalone 12V power source.
It's made for demanding off-grid systems, backup power installations and mobile energy platforms such as large RVs and mobile businesses. With 300A of continuous discharge, a built-in battery management system and CAN and RS485 communication ports, it gives installers and owners a large 12V bank that can grow.
AIMS uses Grade A LiFePO4 prismatic cells rated 3.1V 100Ah, sixteen of them in a 4S4P configuration. That adds up to 400Ah and 5.12kWh of rated energy for stable storage and long operating life.
The battery delivers 300A continuous discharge current, with 440A for 30 seconds and 480A for 5 seconds. That supports demanding DC loads and high-power inverter systems. The 300A discharge runs through an SB350 connector.
The integrated battery management system protects against short circuits, overcharge, over-discharge and high and low voltage, with temperature protection and automatic cell balancing. AIMS lists the overcharge protection voltage at 14.6V.
The front panel has an on/off switch, battery state of charge lights for 25%, 50%, 75% and 100%, plus Alarm and On lights. CAN and RS485 ports let the BMS communicate with monitoring software, and AIMS lists a remote on/off function.
AIMS rates the battery for parallel connection of up to 8 batteries, so you can grow storage for a large solar system or backup bank. A labeled battery expansion port on the front handles the connection.
AIMS rates the battery for 3500 cycles at 80% depth of discharge and 6000 cycles at 60% depth of discharge, with no venting or gassing.
Onboard solar generator expansion. Add 5.12kWh of storage to an AIMS Power Onboard All-in-One Solar Generator through its battery expansion connection.
Large RVs and mobile businesses. Give a mobile power platform more stored energy for appliances, tools and equipment on the go.
Backup power. Build a large 12V LiFePO4 bank for emergency backup and remote installations.
Standalone 12V systems. Run the battery on its own to supply a high-power 12V inverter or large DC loads.
Compared with building a bank from lead-acid batteries, this battery puts 5.12kWh in one LiFePO4 unit with a built-in BMS, automatic cell balancing, virtually no maintenance and no venting or gassing.
One auxiliary battery adds 5.12kWh. Paralleling more batteries adds capacity for larger systems. With several batteries, AIMS has you turn the power switches on one at a time, and off one at a time after the inverter is off.
For the add-on battery, AIMS recommends a battery-to-battery SB350 grey 4/0 AWG cable, which is not included. Connect the battery expansion SB350 to the expansion battery first, then to the AIO-12V. At start-up, turn on the main battery first, then the expansion battery. If you're adding more than one battery to an Onboard Solar Generator, check your plan with our team before you order.
AIMS lists the auxiliary battery at 125 lbs and rates it IP21. Store and operate it indoors in a cool, dry, well-ventilated area on a flat surface, away from extreme weather, and don't install it upside down. Frequent exposure to harsh temperatures may shorten battery life.
Yes. AIMS says the battery can operate as a standalone 12V power source or expand the Onboard All-in-One Solar Generator.
AIMS lists a max charge voltage of 14.2V, overcharge protection at 14.6V and a charge current of 200A.
It discharges from -20°C to 65°C (-4°F to 149°F). Charging starts at 0°C (32°F), so don't charge it below freezing.
AIMS lists the recommended SB350 grey 4/0 AWG battery cables as not included. Our team can help you choose the right cables.
The AIMS Power 12V 400Ah LiFePO4 Auxiliary Battery pairs 5.12kWh of prismatic LiFePO4 storage with 300A continuous discharge, a built-in BMS and CAN and RS485 communication. If you'd like help planning your connection or sizing a battery bank, the Outbound Power team is happy to help.
AIMS Power 12V 400Ah LiFePO4 Auxiliary Battery for Onboard Solar Generator | 5.12kWh Specifications |
|
|---|---|
| Electrical | |
| Nominal Voltage | 12V |
| Capacity | 400Ah |
| Rated Energy | 5.12kWh |
| Chemistry | LiFePO4, Grade A prismatic cells |
| Cells | 16 x 3.1V 100Ah prismatic |
| Cell Configuration | 4S4P |
| Charge and Discharge | |
| Continuous Discharge Current | 300A |
| Peak Discharge Current | 440A for 30 sec, 480A for 5 sec |
| Max Charge Voltage | 14.2V |
| Overcharge Protection Voltage | 14.6V |
| Charge Current | 200A |
| Cycle Life | 3500 cycles at 80% DoD, 6000 cycles at 60% DoD |
| Parallel Connection | Up to 8 batteries |
| Temperature | |
| Discharge Temperature | -20°C to 65°C (-4°F to 149°F) |
| Charge Temperature (Low Limit) | 0°C (32°F) |
| BMS and Monitoring | |
| BMS | Built-in, with automatic cell balancing |
| Protections | Short circuit, overcharge, over-discharge, high and low voltage shutdown, temperature |
| Communication Ports | CAN and RS485 |
| Indicators | State of charge LEDs (25%, 50%, 75%, 100%), Alarm and On |
| Controls | Power switch and remote on/off |
| Physical | |
| Battery Connection | SB350 connector (battery expansion port) |
| Recommended Cable | SB350 grey 4/0 AWG battery to battery (not included) |
| Dimensions | 26 x 32 x 14 in |
| Weight | 125 lbs (163 lbs shipped) |
| IP Rating | IP21 |
| Installation | Indoors, on a flat surface, not upside down |
| Other | RoHS compliant, no venting or gassing |
| Compatibility | |
| Expands | AIMS Power Onboard All-in-One Solar Generator (AIO-12V) |
| Standalone Use | Yes, as a 12V power source |
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