Felicity Solar FLM500-125/261 261.2kWh Energy Storage System

Felicity Solar FLM500-125/261 832V 261.2kWh LiFePO4 Battery

A liquid-cooled 261.2 kWh LiFePO4 system, the FLM500-125/261 delivers 125 kW AC through a 3P4L connection and parallels 6 to 20 units for up to 5224 kWh.

Nominal Energy: 261.2 kWh
Nominal Capacity: 314 Ah
Nominal Voltage: 832 V
Cycle Life: ≥8000

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Full Specifications Download datasheet (PDF)

Felicity Solar FLM500-125/261 832V 261.2kWh LiFePO4 Battery features

261.2 kWh nominal energy from a 1P260S string of LiFePO4 3.2V/314Ah cells rated 314 Ah at 832 V

125 kW AC nominal power on a 3P4L connection at 400 V nominal, 50/60 Hz, across a 360-440 V range

Cycle life rated at ≥8000 cycles, with depth of discharge specified at 95% and a 0.5P charge and discharge rate

Operating window of 728-936 V, with a 728 V cut-off voltage and a 936 V maximum charging voltage

Liquid cooling, IP55 protection and a C4 anti-corrosion grade for -25 to 55 °C service at 0-95% humidity

6 to 20 units in parallel for 1567.2-5224 kWh of system capacity, supervised over RS485 and Ethernet

About the Felicity Solar FLM500-125/261 832V 261.2kWh LiFePO4 Battery

The Felicity Solar FLM500-125/261 is a liquid-cooled LiFePO4 energy storage system rated at 261.2 kWh nominal energy and 125 kW AC nominal power, connected through a 3P4L AC interface at 400 V nominal and 50/60 Hz. Its 1P260S configuration of LiFePO4 3.2V/314Ah cells gives 314 Ah at 832 V nominal. Operating voltage spans 728-936 V, between a 728 V cut-off and a 936 V maximum charging voltage, and the charge and discharge rate is 0.5P. Depth of discharge is specified at 95%, and cycle life is rated at ≥8000 cycles. Maximum system efficiency reaches ≥90%, total harmonic distortion stays under 3% and the DC component under 0.5%, while the power factor is adjustable from -1 to 1 and unbalanced load capacity is 100%. Six to twenty units run in parallel for 1567.2-5224 kWh. Liquid cooling, IP55 protection, a C4 anti-corrosion grade and an aerosol fire extinguishing system with water fire protection, smoke and heat detectors support -25 to 55 °C service at 0-95% humidity, below 2000 m and under 75 dB. The 2670 kg unit reports over RS485 and Ethernet. We are an authorised Felicity Solar distributor, and the FLM500-125/261 ships with a warranty of 5 Years.

Specifications last updated 17 August 2026

Felicity Solar FLM500-125/261 832V 261.2kWh LiFePO4 Battery full specifications

Electrical

AC Connection Type	3P4L
AC Nominal Frequency	50/60 Hz
AC Nominal Power	125 kW
AC Nominal Voltage	400 V
AC Voltage Range	360-440 V
Battery Type	LiFePO4
Charge/Discharge Rate	0.5P
Cut-Off Voltage	728 V
Cycle Life	≥8000
DC Component	<0.5 %
Depth of Discharge	95 %
Max Charging Voltage	936 V
Max Parallel Units	6-20
Max System Capacity	1567.2-5224 kWh
Max System Efficiency	≥90 %
Nominal Capacity	314 Ah
Nominal Energy	261.2 kWh
Nominal Voltage	832 V
Operating Voltage	728-936 V
Power Factor Range	-1 to 1
System Nominal Energy	261.2 kWh
System Nominal Voltage	832 V
System Operating Voltage	728-936 V
Total Harmonic Distortion	<3 %
Unbalanced Load Capacity	100 %

Mechanical

Cell Type	LiFePO4 3.2V/314Ah
Communication	RS485, Ethernet
System Battery Configuration	1P260S

Environmental

Anti-Corrosion Grade	C4
Charging Temperature Range	-25 to 55 °C
Discharging Temperature Range	-25 to 55 °C
Fire Suppression System	Aerosol fire extinguishing equipment, Water fire protection, Smoke detector, Heat detector
Humidity Range	0-95 %
Noise Level	<75 dB
Operating Altitude	<2000 m
Protection Degree	IP55
Temperature Control Method	Liquid cooling

Certifications

UN38.3
EN 50549
IEC 61000
IEC 62109
IEC 62477
IEC 62619
IEC 63056

Frequently Asked Questions

261.2 kWh is the nominal energy of the FLM500-125/261, and the same 261.2 kWh is quoted as its system nominal energy. Depth of discharge is specified separately at 95%. Nominal capacity is 314 Ah at 832 V nominal.

125 kW AC nominal power, delivered on a 3P4L connection at 400 V nominal and 50/60 Hz, over an AC voltage range of 360-440 V. Power factor is adjustable from -1 to 1, total harmonic distortion stays under 3% and unbalanced load capacity is 100%.

6 to 20 units run in parallel, for a maximum system capacity of 1567.2-5224 kWh. Each unit runs at 832 V nominal within a 728-936 V operating window, and maximum system efficiency is ≥90%.

IP55 protection with a C4 anti-corrosion grade, liquid cooling, and an aerosol fire extinguishing system with water fire protection plus smoke and heat detectors. The 2670 kg unit runs from -25 to 55 °C at 0-95% humidity, below 2000 m and under 75 dB, and ships with a warranty of 5 Years.