Power Queen 2 Pack 12.8V 100Ah LiFePO4 Battery Pack - High Cycle Solar

In this review the Power Queen 2 Pack 12.8V 100Ah LiFePO4 Battery is evaluated as a compact, high-cycle energy option for off-grid and mobile power users; the single biggest reason to consider it is its combination of long cycle life and light weight that makes it practical for RVs, solar home systems and portable setups without the handling and capacity loss of lead-acid batteries. The reviewer found the 2-pack configuration especially useful for building larger banks via series or parallel connections, and the built-in 100A BMS simplifies protection and maintenance when used as a deep-cycle energy storage solution.

Key Features

• Built-in 100A BMS: Protects the pack from over-charge, over-discharge, over-current, high temperature and short circuit for safer everyday use.
• High cycle life: Rated up to 15000+ cycles at 60% DOD, offering years of repeatable capacity and lower long-term replacement cost.
• Extensible configuration: Can be connected in series up to 4S or parallel up to 4P to reach higher voltages or larger capacities for diverse installations.
• Fast charging: Charges in roughly five hours with a recommended 14.6V 20A charger, cutting charging time compared with typical lead-acid chemistry.
• Lightweight design: At about 24.25 lbs per battery, it delivers roughly double the usable capacity of a similar lead-acid unit while remaining easy to install and move.
• UL2271 certified: Certification for micromobility devices indicates adherence to recognized safety standards for lithium battery design.

Who It's For

The 2-pack Power Queen LiFePO4 set is aimed at homeowners building small solar storages, RV owners who need a lighter deep-cycle option, and hobbyists who require flexible series/parallel expansion for off-grid applications. Its long cycle life and 100% usable capacity make it attractive where daily or frequent cycling is expected.

It is not designed to be a starter battery or to power vehicles that require high cranking currents, and those needing a dedicated starting solution or specialized golf cart batteries should look elsewhere. Users should also ensure they match recommended chargers and follow wiring guidance for series/parallel builds.

Pros & Cons

Pros

• Excellent longevity and cycle life that lowers lifetime cost compared with lead-acid alternatives.
• Lightweight and compact, making installation in tight RV or home battery bays straightforward.
• Built-in 100A BMS provides essential protections without separate hardware.
• Flexible expandability in series or parallel for 48V or higher-capacity systems.

Cons

• Not suitable as a starter battery; the design is for energy storage rather than high-current cranking.
• Requires adherence to recommended charging parameters and occasionally a same-brand charger if charging issues appear.

Specifications

Our Verdict

The Power Queen 2 Pack 12.8V 100Ah LiFePO4 batteries are a solid choice for anyone building a small solar storage bank or upgrading RV power to a lighter, longer-lived chemistry. They deliver reliable deep-cycle capacity, a useful built-in 100A BMS, and clear expandability - making them good value for users who need dependable, compact energy storage and expect frequent cycling over many years.

Frequently Asked Questions

Can these batteries be connected in series or parallel?
Yes. They support series up to 4S for higher voltage and parallel up to 4P for larger capacity, allowing flexible system design.

Are these batteries suitable for engine starting?
No. These LiFePO4 units are intended for energy storage and deep-cycle use, not as starter batteries for engines or golf carts.

How long does it take to charge one battery fully?
With the recommended 14.6V 20A charger a 100Ah battery typically charges in about 5 hours.