Integrated Reverse Control Unit

FEM Series 8.5/11 kW 220 V / 230 V AC Output

Product Features

Dual-input MPPT
Pure Sine Wave Off-Grid Inverter
Output power factor PF = 1.0
Maximum PV input voltage: 500 Vdc
Built-in MPPT 140A/160A charge controller
Supports battery-free operation mode
Removable dust‑proof mesh cover, suitable for harsh environments.
Optional Wi‑Fi remote monitoring
Supports multiple output priority modes: SUB, SBU, SUF
Equipped with a built‑in lithium battery and dual activation functionality, it can be triggered simply by connecting either mains power or photovoltaic power; the lithium battery can communicate via RS485.
Built-in battery equalization charging function optimizes battery performance and extends service life.

Parameter Table

Model	FEM8500-48L	FEM8500-48L
Power	8.5KVA/8.5KW	11KVA/11KW
Maximum Photovoltaic Input Power	10KW	11KW
Parallel operation	Not supported	Not supported
Input
Rated Voltage	230VAC	230VAC
Voltage range	170-280VAC	90-280VAC
Frequency	50/60 Hz (Auto Detection)	50/60 Hz (Auto Detection)
Output
Rated Voltage	220/230/240VAC	220/230/240VAC
Instantaneous power	17000VA	22000VA
Frequency	50/60 Hz	50/60 Hz
Output waveform	Pure sine wave	Pure sine wave
Conversion Time	10 ms; 20 ms	10 ms; 20 ms
Peak Efficiency	94%	94%
Overload protection	5s @ >140% load; 10s @ 101%–140% load	5s @ >140% load; 10s @ 101%–140% load
Power factor	0.6–1 (capacitive or inductive)	0.6–1 (capacitive or inductive)
battery
Battery voltage	48VDC	48VDC
Maximum discharge current	180A	220A
Float Charge Voltage	54VDC	54VDC
Overcharge protection	63VDC	63VDC
Charging Mode	CC/CV	CC/CV
Lithium‑ion Communication	Support	Support
Lithium battery activation	Support	Support
Photovoltaic Charging & Mains Power Charging
Charging Mode	MPPT	MPPT
Maximum Photovoltaic Input Power	5000W*2	5500W*2
Maximum Photovoltaic Open-Circuit Voltage	500VDC	500VDC
MPPT Voltage Range	60VDC–500VDC	60VDC–500VDC
Maximum Photovoltaic Input Current	18A*2	18A*2
Maximum Photovoltaic Charging Current	140A	160A
Maximum Mains Charging Current	120A	120A
Maximum Charging Current	140A	160A
Physical Properties
Size	Length × Width × Height (mm): 540415122	540415122
Net Weight (kg)	14	15
Communication Interface	RS232/RS485/Dry Contact	RS232/RS485/Dry Contact
LCD	Yes.	Yes.
Application Environment
Operating temperature range	-10°C to 50°C	-10°C to 50°C
Storage temperature range	-15°C to 60°C	-15°C to 60°C
Humidity	5% to 95% relative humidity (no condensation)	5% to 95% relative humidity (no condensation)