Aims Power Auxiliary 12V Lithium Battery 420 Amp – 5.58 kWh - AIO-12V-BAT1

Aims Power Auxiliary 12V Lithium Battery 420 Amp – 5.58 kWh - AIO-12V-BAT1

This battery can be used as a 12V powerful lithium battery or as an extra add-on for the ONBOARD All in One Solar Generator.

5.58 kWh Lithium Battery 12V, 420A.The AlO Solar Generator can use up to 8 aux batteries for large amounts of stored power, up to whopping 50,274 WH (50.27 KWH)! The solar generator recharges the batteries using solar, alternator, grid, generator or a combination. 

Specifications

What our Experts Think

• High-capacity 420Ah (5.58 kWh) lithium storage delivers strong energy reserves for off-grid, RV, marine, and backup power systems.
• Lithium iron phosphate (LiFePO₄) chemistry provides superior cycle life, thermal stability, and safety compared to traditional lead-acid batteries.
• Consistent voltage output under load ensures stable performance for inverters, appliances, and sensitive electronics.
• Deep-cycle capability supports frequent discharging and recharging without significant capacity loss over time.
• Integrated Battery Management System (BMS) protects against overcharge, over-discharge, over-current, and temperature extremes.
• Lightweight design vs lead-acid equivalents makes installation easier while improving overall system efficiency.
• Ideal for solar energy storage systems where long-term reliability and high usable capacity are essential.
• Strong fit for serious off-grid users needing scalable lithium power for cabins, mobile systems, or whole-home backup setups.

                   
Q&A        

Q: What is the AIMS Power AIO-12V-BAT1 used for?
A: Aims Power Auxiliary 12V Lithium Battery 420 Amp – 5.58 kWh - AIO-12V-BAT1 is a high-capacity LiFePO₄ auxiliary battery designed to expand energy storage in AIMS Power all-in-one solar and off-grid power systems.

Q: How much energy does this battery store?
A: It provides approximately 5.58 kWh of usable energy, offering long runtime for off-grid homes, RV systems, cabins, and backup power setups.

Q: What systems is this battery compatible with?
A: It is designed specifically for AIMS Power all-in-one systems but can also be used in compatible 12V lithium-based off-grid solar power systems.

Q: Can this battery be expanded?
A: Yes. Multiple 420Ah auxiliary batteries can be added in parallel to significantly increase total storage capacity for larger energy needs.

Q: What type of battery chemistry is used?
A: It uses lithium iron phosphate (LiFePO₄), known for long cycle life, stable performance, and improved safety compared to lead-acid batteries.

Q: Is it suitable for solar energy storage?
A: Yes. It is ideal for storing solar energy in off-grid and hybrid systems, especially when paired with compatible MPPT controllers and inverters.

Q: What are the benefits of a lithium auxiliary battery?
A: It offers higher usable capacity, faster charging, lighter weight, and deeper discharge capability compared to traditional lead-acid batteries.

Q: What applications is it best for?
A: It is commonly used for backup power systems, remote installations, RV/van builds, and expanding industrial-grade solar generator setups.

           
Maintenance Tips    

• Store and operate in a cool, dry environment (15–30°C ideal) to preserve lithium cell life and BMS performance.
• Keep battery away from direct sunlight, moisture, and heat sources to prevent thermal stress and degradation.
• If stored long-term, charge every ~3 months to prevent deep sleep or capacity loss.
• Avoid leaving the battery in a fully discharged state for extended periods; recharge promptly after use.
• Ensure all connections are tight, clean, and corrosion-free to support high current (up to 420Ah system loads).
• Do not exceed manufacturer-recommended charge/discharge limits; rely on the built-in BMS protection.
• Keep battery surface clean and dry; avoid conductive debris or metal contact near terminals.
• Maintain proper ventilation around the unit, even though lithium systems produce minimal gas.
• Inspect cables and busbars regularly for heat marks or insulation wear under heavy load.
• Do not attempt disassembly or repair—service only through qualified technicians to avoid voiding warranty.
• If part of an AIO system, ensure firmware/monitoring system is checked periodically for fault codes and balancing status.