12.8V 100Ah LiFePO4 Battery - Long-Life Deep Cycle for RV & Solar

In this review of the 12.8V 100Ah LiFePO4 Battery, the bottom line is simple: this is a lightweight, long-life replacement for Group 24 lead acid deep-cycle batteries aimed at RV owners, campers, small off-grid solar systems, and anglers running 30-70 lb trolling motors. The single biggest reason to buy is the battery's combination of high cycle life and low weight: at just 22.57 lbs it replaces bulky lead acid units while promising thousands of cycles under normal use, making it a practical, low-maintenance energy storage option.

Key Features

• Group24 Size: Built to BCI Group 24 dimensions so it fits most G24/G27/G31 battery boxes without modification.
• Long Cycle Life: Deep cycle LiFePO4 chemistry and 100A BMS deliver up to 4,000 cycles at 100% DOD and significantly more at reduced DOD for many years of service.
• Lightweight Portability: Weighing about 22.57 lbs with a handle, it is roughly one third the weight of comparable lead acid batteries, easing installation and transport.
• Expandable Configurations: Can be connected up to 4 in parallel and 4 in series, enabling larger capacity or higher voltage systems for modular solar or backup setups.
• Water-Resistant Case: IP65 rating improves durability for marine and outdoor use where splashes or damp conditions occur.

Who It's For

This battery is best for RV owners, campers, small off-grid solar users, and boaters who need a reliable deep-cycle energy source that is lighter and more compact than lead acid. It suits anyone who values portability and long-term cycle life for repeated daily use, such as running refrigerators, electronics, trolling motors up to about 70 lb thrust, or charging devices while off-grid.

It is not intended for engine starting in cars or for powering golf carts; buyers needing a high-cranking marine start battery or a dedicated starter battery should look elsewhere. Also, users requiring very high instantaneous discharge beyond the specified 1C continuous rate should confirm compatibility with their equipment.

Pros & Cons

Pros

• High cycle life provides excellent longevity and lower lifetime cost compared with lead acid.
• Lightweight and compact Group 24 form factor makes it easy to install and store.
• 100A built-in BMS adds safety and protects the cells during normal operation.

Cons

• Designed as an energy storage battery only; not suitable for automotive engine starting or golf cart propulsion.
• Maximum continuous discharge is 1C, so extreme high-current applications may be limited.

Specifications

Nominal Voltage	12.8V
Capacity	100Ah (approx 1280Wh)
Size (BCI Group 24)	10.23 in x 8.30 in x 6.61 in
Weight	22.57 lbs
BMS	Built-in 100A
Cycle Life	Up to 4,000 cycles at 100% DOD; 8,000+ at 80% DOD; 15,000+ at 60% DOD (proper use)
Ingress Protection	IP65

Our Verdict

The 12.8V 100Ah LiFePO4 Battery is a sensible choice for users who need a durable, lightweight deep-cycle battery that fits Group 24 compartments and delivers long service life for RVs, campers, small solar systems, and trolling motors. Its combination of portability, built-in 100A BMS safety, and scalability offers good value for those replacing lead acid batteries, provided the 1C discharge limit and non-starter designation match the intended use.

Frequently Asked Questions

Can this battery be used to start a car?
No. This unit is an energy storage deep-cycle battery and is not designed for engine starting or high cranking current applications.

Can multiple batteries be combined for larger systems?
Yes. The battery supports up to 4 in parallel and 4 in series for expanded capacity or higher voltage systems when installed correctly.

What charging voltage should be used?
Use a lithium-compatible charger, typically in the 13.8V to 14.6V range, to fully charge the battery safely.