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NK Serise 3KW/5KW solar home inverter

Item No.: BK-NK-(3KVA-5KVA)
Input :165VAC—265VAC   50Hz/60Hz ±5Hz
PV  range  :  75VDC --- 150VDC             
Battery Voltage:48VDC
Payment terms: T/T, L/C, Western Union
Lead time: 18 days
Warranty: 1 year
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Description Main Features Specifications

NK Series Working Principle

1、DC first mode:
    When the solar energy is sufficient,it will charge the batteries and at the same time power the load in Pure Sinewave.
When the Battery Bank has been discharged up to certain level(default 48V) and Grid is available,the system will switch to AC working mode(Bypass).If not the Battery Bank will continues to discharge until the protection level.
When the battery voltage is recovered to the Recovery point(default 55V) , the system will switch to Inverter mode automatically .in this mode inverter will be taking advantage of solar max.
2、AC first mode:
    When AC input is normal,the system will run into AC working mode(Bypass) ,if AC input is abnormal,the system will work as Inverter mode.in this mode inverter has high efficiency
3、SAVER mode:
    If the SAVER switch turn on,the system will work into SAVER mode,at the same time, the output will be shut down ,and the solar will charge the battery only
Main Features:

_
Using industrial-grade intelligent design .
_ Pure sine wave output, suitable for TV sets, refrigerators, induction cooker, electric fans, microwave ovens, air conditioning and other household equipment .
_ Technical parameters are conveniently displayed on the LCD.
_ Can choose LCD touch screen interface system (Optional).
_ Have Intelligent agenda management function.
_ Have capacity cumulative function, can view real-time accumulated generating capacity .
_ Have overcharge, over-discharge, overload, short-circuit, low voltage, over heat protection function.
_ Can choose cloud data system(Optional)
_ USB interface setting adjustment via software.
_ Can setting charge voltage,current,switch-point etc through LCD.
_ Have perfect protection mechanism and self starting function.
Model BK-NK-3KW BK-NK-5KW
3000W 5000W
DC48V DC48V
Size (mm) 600*310*180 650*360*180
Weight(KG) 30±1 40±1
Grid (Mains) parameters
Input voltage  waveform Pure Sine Wave(mains or generator)
Input voltage 220Vac
Working voltage range (165--265)Vac
Frequency range (45-65)Hz
bypass output
voltage waveform
Same as Input Waveform
Overload protection Breaker On
Short circuit protection Breaker On
Power efficiency >95%
Switching  time (AC to DC) 5ms
Switching time(DC to AC) 5ms
Bypass Max input current 17A/28A
MAX charge BAT current 20A/32A
Inverter parameters
Output voltage waveform Pure sine wave
Rated output capacity(VA) 3000 5000
Rated output power(W) 3000 5000
PF 0.9~1.0
Rated output voltage(V) 220Vac
Rated output frequency (Hz) 50Hz ± 0.1Hz
Auto track main frequency(Hz) Yes (from the first start)
50Hz @45-55Hz
60Hz @55-65Hz
Output voltage range ±2% rms
Efficient >80%
Overload protection (100%
Peak capacity 6000VA 10000VA
Rated DC input voltage 48V
Min DC voltage 40V
Low DC Alarm Voltage (44.0±1)Vdc
Low DC Cut-off Voltage (40--44)Vdc
High DC Cut-off Voltage (63.0±1)Vdc
High DC Recovery Voltage (61.0±1)Vdc
No Load Power consumption ≤5%
Standby Power Consumption ≤0.5%
PV parameters
PV input OC voltage range (75--150)Vdc
MAX input current 40A
MPPT output current(MAX) 60A 100A
charging bat current (20--60)A (20--99)A
Temperature coefficient -18mV/℃/12V
Auto temperature compensation Setting value-(MAX -25℃)*0.018
Output voltage lines wave-peak 200mV
Environment
Humidity <90%
Operating Temperature 0℃--55℃; within 35℃--55℃,the rated output power had to reduce 2% when the temperature increase 1℃(if overload,the system maybe reduce the power automatically,even shut down)
Storage Temperature -15℃--60℃
Altitude <3000m(more than 1000m,the rating power of each increase of 1000m decreased by 10%)