15kWh Felicity FLA48300TG2 48V 300Ah Lithium Battery with Built-In WiFi Module

The 15kWh Felicity FLA48300TG2 is a high-capacity 48V 300Ah lithium battery built for compatible solar and backup systems where substantial energy storage is required from a single battery unit.

Its 15kWh capacity gives it a clear advantage for larger homes, businesses and solar installations requiring more stored energy for evening consumption, overnight use or extended power backup.

A major feature of the FLA48300TG2 is its built-in WiFi module, providing integrated connectivity without requiring WiFi to be added as a separate external module.

With 48V, 300Ah and 15kWh combined in one lithium battery, this model is positioned above smaller 5kWh and 10kWh storage options for customers with greater energy-storage requirements.

Technical Specifications

Key Features

• Large 15kWh energy-storage capacity
• High-capacity 48V 300Ah configuration
• Lithium battery technology
• Built-in WiFi module
• Single-battery high-capacity storage solution
• Designed for compatible 48V solar systems
• Suitable for larger home and business backup requirements
• 50% more nominal storage than a 10kWh battery
• 3× the nominal storage of a 5kWh battery
• Exact Felicity model FLA48300TG2

15kWh Storage for Bigger Energy Demands

The defining advantage of the FLA48300TG2 is its 15kWh battery capacity.

This provides significantly more stored energy than smaller batteries, making it particularly useful where the objective is to extend backup duration or store more daytime solar generation for later consumption.

Compared with a 10kWh battery, the FLA48300TG2 provides:

15kWh − 10kWh = 5kWh additional nominal storage

That represents a 50% increase in nominal energy capacity.

48V 300Ah Lithium Configuration

The FLA48300TG2 combines:

48V | 300Ah | 15kWh

in a single lithium battery.

The 300Ah capacity makes this model particularly relevant to larger 48V energy-storage systems where a 100Ah or 200Ah battery would provide less stored energy.

Exact inverter compatibility should still be determined from the inverter’s battery-voltage range, charging requirements and communication requirements.

Built-In WiFi Module

The FLA48300TG2 comes with a built-in WiFi module, giving this exact model integrated connectivity.

This is particularly useful for installations where compatible connected battery functionality is required without adding a separate WiFi module.

The exact monitoring application, displayed battery information, remote functionality and WiFi setup procedure should follow Felicity’s documentation for the FLA48300TG2.

15kWh vs 10kWh vs 5kWh

For systems where storage capacity is the deciding factor:

The FLA48300TG2 therefore provides:

• 10kWh more nominal storage than a 5kWh battery
• 5kWh more nominal storage than a 10kWh battery
• 3× the nominal capacity of a 5kWh battery
• 50% more nominal capacity than a 10kWh battery

This makes the 15kWh model particularly attractive where greater stored energy is required from a single battery.

15kWh Storage vs Inverter Power

The battery’s 15kWh rating represents energy capacity, not inverter output.

🔋 15kWh = Stored energy

⚡ kW = Power delivered at a given time

A 15kWh battery therefore should not automatically be assumed capable of supplying a 15kW load. The battery’s permitted discharge power/current and inverter requirements must be confirmed when designing the system.

Applications / Use Cases

🏠 Large Home Solar Systems – substantial lithium storage for appropriately calculated household energy requirements.

☀️ Day-to-Night Solar Storage – stores daytime solar generation for use when production reduces.

🏪 Business Backup – higher-capacity storage for appropriately sized essential business loads.

🏢 Commercial Solar Systems – suitable for compatible 48V installations requiring increased stored energy.

⚡ Extended Backup – 15kWh capacity for installations where smaller 5kWh or 10kWh batteries may provide insufficient storage.

Battery & Inverter Matching

Before installing the FLA48300TG2, verify:

• Inverter supports a compatible 48V battery platform
• Inverter battery operating-voltage range
• Required charge current
• Required discharge power
• Battery communication compatibility
• Expected maximum load
• Required backup duration
• Correct DC cable sizing
• Appropriate DC protection and isolation
• WiFi configuration requirements

The supplied specifications do not state cycle life, DOD, charge current, discharge power or communication protocol for this exact model. These should be confirmed from Felicity’s FLA48300TG2 documentation rather than assumed from another Felicity battery.

Usage & Installation Notes

• Match with a compatible 48V inverter
• Configure charging according to the battery’s specified requirements
• Confirm discharge capability before determining supported loads
• Use appropriately sized battery cables
• Install suitable DC protection and isolation
• Observe correct polarity
• Protect battery terminals against short circuits
• Follow Felicity installation requirements
• Configure the built-in WiFi according to the manufacturer’s instructions

Mini FAQ

What is the exact model?
Felicity FLA48300TG2.

What type of battery is it?
It is specified as a lithium battery.

What is its storage capacity?
15kWh.

What is the voltage and Ah rating?
48V and 300Ah.

Does it have WiFi?
Yes. The FLA48300TG2 has a built-in WiFi module.

Is it LiFePO₄?
The supplied specification confirms lithium battery, but does not specify the exact lithium chemistry. LiFePO₄ should only be stated if confirmed for this exact model.

How much larger is it than a 10kWh battery?
It provides 5kWh more nominal storage, equivalent to 50% more capacity.

Why Buy from Macire

• Exact Felicity FLA48300TG2 model
• Large 15kWh energy storage
• High-capacity 48V 300Ah configuration
• Lithium battery
• Built-in WiFi module
• 50% more nominal storage than 10kWh
• Professional battery and inverter matching support

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