5KWH 25.6V FIRMAN LITHIUM BATTERY

The FIRMAN 5kWh 25.6V Lithium Battery (model B2520002) is a high-capacity energy storage unit specifically designed for 24V solar and inverter systems. Marketed under the PentaWall series, it is a wall-mounted solution intended for residential or small office backup power. 

Technical Specifications

According to manufacturers and retailers like Sumec Plaza and Zit Nigeria, the battery features the following parameters:

Model Number: B2520002

Nominal Energy: 5.12kWh (5120Wh)

Nominal Capacity: 220Ah

Rated Voltage: 25.6V (compatible with 24V inverter systems)

Charging Voltage: 27.6V – 28.8V

Max Charge/Discharge Current: 150A (continuous)

Weight: 50.4kg

Dimensions: Designed for space-saving wall-mount installation 

Key Features & Performance

LiFePO4 Chemistry: Uses Lithium Iron Phosphate cells, which are widely regarded as the safest and most stable lithium technology.

Long Cycle Life: Rated for 6,000 cycles at 80% Depth of Discharge (DoD), which translates to an estimated 15-year service life under standard conditions.

Intelligent BMS: Features a built-in Battery Management System that monitors temperature, voltage, and current to prevent overcharging, short circuits, and overheating.

Scalability: Supports parallel connection of up to 6 units, allowing you to expand your total storage capacity to 30.72kWh as your power needs grow.

LCD Display: Includes an integrated screen for real-time monitoring of battery status, current, and voltage levels. 

Warranty and Availability

The battery typically comes with a 6-year warranty. It is available through several Nigerian retailers, including Sumec Plaza, Zit Nigeria, and Ifesolox. 

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