Felicity Solar FLS48100SG2 51.2V 5.12kWh LiFePO4 Battery

A 51.2 V LiFePO4 stack that grows one 5.12 kWh, 100 Ah module at a time to 40.96 kWh across eight modules, managed end to end by an S16 BMS on RS485 or CAN.

System Nominal Energy (1-8 packs): 5.12-40.96 kWh
System Nominal Voltage: 51.2 V
Cycle Life: ≥6000 Cycles

3,626 AEDincl. VAT

In stock

Full Specifications Download datasheet (PDF)

Felicity Solar FLS48100SG2 51.2V 5.12kWh LiFePO4 Battery features

5.12 kWh to 40.96 kWh in one stack

Begin with one 100 Ah, 5.12 kWh module and add up to eight in parallel; the FLS48100SG2 stays at 51.2 V whichever size you build.

≥6000 cycles, with ≥95% depth of discharge

The LiFePO4 cells are rated for ≥6000 cycles with a depth of discharge of ≥95%, so nearly all of the 40.96 kWh is usable every day.

400 A continuous, 800 A peak for 15 seconds

Continuous charge/discharge climbs 60, 120, 180, 240, 300, 360, 400 and 400 A as modules are added, with a 15-second peak ladder from 100 A to 800 A.

S16 BMS reporting over RS485 or CAN

The S16 battery management system holds the FLS48100SG2 inside 44.8~57.6 V, floats at 57.6 V and cuts off at 48 V, reporting over RS485 or CAN.

IP21 cabinet with breaker, fuse and under-voltage protection

A built-in smart BMS, breaker and fuse guard the IP21 enclosure, which carries under-voltage protection and runs at 5% ~ 95% relative humidity up to 2000 m.

46 kg modules, 414 kg fully stacked

Every 600 x 450 x 180 mm module weighs 46 kg and the complete 600 x 1620 x 450 mm FLS48100SG2 weighs 414 kg, wall-mounted or floor-mounted.

About the Felicity Solar FLS48100SG2 51.2V 5.12kWh LiFePO4 Battery

The Felicity Solar FLS48100SG2 is a stackable 51.2 V LiFePO4 battery system that starts at 5.12 kWh with a single 100 Ah module and scales to 40.96 kWh with eight modules in parallel, delivering up to 400 A continuous charge or discharge, an 800 A peak for 15 seconds, and ≥6000 cycles, with a depth of discharge of ≥95%. Each module measures 600 x 450 x 180 mm and weighs 46 kg, so a fully populated FLS48100SG2 stands 600 x 1620 x 450 mm and weighs 414 kg, wall-mounted or floor-mounted as the room allows. The S16 BMS holds the stack inside 44.8~57.6 V, floats at 57.6 V, cuts off at 48 V and reports over RS485 or CAN, while an LCD on the control module and four LEDs on every battery module show status at a glance. A built-in smart BMS, breaker and fuse cover under-voltage and the rest of the protection set. The IP21 enclosure is made for indoor rooms at 5% ~ 95% relative humidity and altitudes up to 2000 m: charge between 0°C and +55°C, discharge from -20°C to +55°C, store between 0°C and +35°C. We are the authorised Felicity Solar distributor for the FLS48100SG2.

Specifications last updated 23 July 2026

Felicity Solar FLS48100SG2 51.2V 5.12kWh LiFePO4 Battery full specifications

Electrical

Elevation	Operating environment: Suitable for indoor
Depth of Discharge (DoD)	≥95 %
Max. Charging Current	60A*N(Max=400A)
Max. Charging Voltage	57.6V
Max.continuous charge/Discharge current	60A 120A 180A 240A 300A 360A 400A 400A
Overcurrent Protection (A)	Over
Peak Charge/Discharge Current(15s)	100A 200A 300A 400A 500A 600A 700A 800A
Power/Running	on, press and hold for 3 seconds to turn off; 2. A green light indicates normal status,
Recommend Charge/Discharge Power	50A 100A 150A 200A 250A 300A 350A 400A
Battery Type	LiFePO4
Cycle Life	≥6000Cycles
Display type	Control Module:LCD/Battery Module:LED*4
Module Nominal Capacity	100Ah
Module Nominal Energy	5.12KWh
Module Nominal Voltage	51.2V
System Nominal Energy	5.12 – 40.96 kWh (1–8 modules)
System Nominal Voltage	51.2V
System Operating Voltage	44.8~57.6V
Number of Battery Modules	1-8
Recommended Charge/Discharge Current	50 / 100 / 150 / 200 / 250 / 300 / 350 / 400 A
Max Continuous Charge/Discharge Current	60 / 120 / 180 / 240 / 300 / 360 / 400 / 400 A
Peak Charge/Discharge Current (15s)	100 / 200 / 300 / 400 / 500 / 600 / 700 / 800 A
Scalability	Max 8 packs in parallel (40.96 kWh)
Communication	RS485 / CAN
Max Charging Voltage	57.6 V
Floating Charging Voltage	57.6 V
Cut-off Voltage	48 V
BMS Version	S16

Mechanical

Installation	Wall-Mounted / Floor-Mounted
Package Dimension	712x562x298mm
Control Module Weight	46 kg
Control Module Dimensions	600 x 450 x 180 mm
Battery Module Weight	46 kg
Battery Module Dimensions	600 x 450 x 180 mm
Protection Level	IP21
Protection	Built-in smart BMS, Breaker, Fuse

Environmental

Relative humidity:	5% ~ 95%
Storage temperature:	0°C~+35°C
Storge Temperature Range	0°C~+35°C
Working Temperature Range	Discharge:-20°C~+55 °C
Working temperature:	-20°C~+55°C
Altitude	≤2000m
Humidity	5%~95%
Working Temperature (Charge)	0°C to +55°C
Working Temperature (Discharge)	-20°C to +55°C
Warranty	10 Years
Over Voltage Protection	Built-in smart BMS, Breaker, Fuse
Under Voltage Protection	Yes

Certifications

CE
ISO9001

Frequently Asked Questions

5.12 kWh to 40.96 kWh. One 100 Ah module holds 5.12 kWh at 51.2 V, and the FLS48100SG2 takes up to eight modules in parallel for 40.96 kWh. Because the depth of discharge is ≥95%, almost all of that energy is usable.

400 A maximum. Charging runs at 60 A per module up to a 400 A ceiling, and the continuous charge/discharge ladder is 60, 120, 180, 240, 300, 360, 400 and 400 A as modules are added, with a 15-second peak of 100 A to 800 A.

600 x 1620 x 450 mm and 414 kg for the complete stack. Each battery module and the control module measure 600 x 450 x 180 mm and weigh 46 kg, and the package measures 712x562x298mm. Wall-mounted and floor-mounted installation are both supported.

0°C to +55°C for charging and -20°C to +55°C for discharging. The IP21 enclosure suits indoor rooms at 5% ~ 95% relative humidity and altitudes of ≤2000m, and the FLS48100SG2 should be stored between 0°C and +35°C.