12.8V 100Ah LiFePO4 Battery Bluetooth - Deep Cycle 100A BMS

In this review the KEPWORTH 12.8V 100Ah LiFePO4 battery is evaluated for anyone needing a reliable deep cycle battery for marine, RV, solar or backup use; the single biggest reason to buy is its combination of a built-in 100A BMS and smart Bluetooth monitoring, which makes it easy to track cell and system health while delivering stable 12.8V power. The reviewer found the battery well suited to continuous loads up to 100A and appreciated the simplified installation options for series and parallel expansion.

Key Features

• Built-in 100A BMS: protects the battery from overcharge, overdischarge and excessive current, providing safer operation for boats and RV systems.
• Smart Bluetooth monitoring: lets users check battery status, cell information and charging or discharging state from a phone for quick troubleshooting.
• 100Ah capacity: provides about 1.28 kWh of usable energy, suitable for trolling motors, small inverters and off-grid loads.
• High discharge capability: supports a continuous 100A draw and a brief inrush of 200A for 3-5 seconds to handle motor starts and surge loads.
• Series and parallel flexibility: supports series and parallel connections up to 4S4P so systems can be expanded to higher voltages or capacities.
• Automotive grade cells: manufactured from grade A LiFePO4 cells for stable performance and longer cycle life compared with generic lead options.

Who It's For

This battery is a strong match for boat owners running trolling motors, RV owners needing a compact 12V house battery, off-grid solar users who want a small bank with monitoring, and anyone needing a lightweight deep cycle replacement for Group 24 lead batteries. The Bluetooth monitoring and built-in BMS make it particularly useful for users who want remote status checks and straightforward system integration.

Those who need engine starting or high-cranking automotive starter power should look elsewhere, since the product is specified as a deep cycle LiFePO4 and not intended for use as a car starting battery or golf cart starter service. Also, users requiring very large single-battery capacities should plan a parallel bank or choose higher-capacity modules.

Pros & Cons

Pros

• Integrated 100A BMS provides useful protection for daily cycling and charging routines.
• Bluetooth monitoring gives clear visibility into cell voltages, state of charge and charging/discharging status.
• Compact Group 24 size with 100Ah capacity offers a good energy-to-size ratio for boats and RVs.
• Supports series and parallel connections, enabling flexible system design for 12V to 48V setups.

Cons

• Not suitable as a starter battery for engines; it is designed as a deep cycle LiFePO4 unit rather than a cranking battery.

Specifications

Nominal voltage	12.8V
Capacity	100Ah (1.28 kWh)
Max continuous discharge	100A
Peak inrush current	200A for 3-5 seconds
Recommended charge voltage	14.6V
Recommended max charge current	<50A
Dimensions (LxWxH)	10.24 in x 6.61 in x 8.46 in

Our Verdict

The KEPWORTH 12.8V 100Ah LiFePO4 battery is a practical, value-oriented deep cycle option for marine, RV and small off-grid systems that need reliable 12V power and convenient Bluetooth monitoring. Its 100A BMS and support for series/parallel expansion make it a flexible building block for larger banks, and it delivers good performance compared with same-size lead alternatives. Buy it if you want a compact, monitored LiFePO4 Group 24 replacement for house loads; do not use it as an engine starter battery.

Frequently Asked Questions

Can multiple batteries be connected in series or parallel?
Yes, the battery supports series and parallel connections up to 4S4P, allowing expansion to higher voltages or greater capacity when configured properly.

What charging voltage should be used?
The recommended charging voltage is 14.6V and the recommended charging current is less than 50A for safe charging.

Is this battery suitable for starting a car?
No, this unit is designed as a deep cycle LiFePO4 battery and is not intended for use as a car starting battery or golf cart starter battery.