NK SERIES SOLAR HOME INVERTER
Category: Solar Energy
- MPPT to track solar MAX power
- Pure sine wave output.
- Can power all kinds of appliances in-home or office environment.
- Technical parameters are conveniently displayed on the LCD.
- Have capacity cumulative function, can view real-time accumulated generating capacity.
- Have overcharge, over-discharge, overload, short-circuit, low voltage, overheat protection function.
- Can choose Wind & Solar Energy Hybrid power supply system (Optional).
- Can set charge voltage, current, switch-point, etc through LCD.
- Have AC first and DC first running modes, and can also work into standby mode.
- Have perfect protection mechanism and self-starting function.
Basic System Architecture:
The following illustration shows the basic application for this inverter.It also includes the following devices to have a complete running system:
This inverter can power all kinds of appliances in-home or office environments, including motor-type appliances such as tube lights, fans, refrigerators, and air conditioners.
The Principle Diagram:
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 AC Output form（Fig 1）.
When the Battery Bank has been discharged up to a certain level（default 48V） and the Grid is available, the system will switch to AC working mode(Bypass). If however, Grid is not available the Battery Bank will continue to discharge until the protection level(Fig 2).
When the battery voltage is recovered to the Recovery point(default 55V), the system will switch to Inverter mode automatically.
2.AC first mode(Fig 3):
Whenever AC input is normal, the system will run into AC working mode(Bypass), when AC input is abnormal, the system will work as Inverter mode.
3.SAVER mode(Fig 4):
The front panel
If the SAVER switch turns on, the system will work into SAVER mode, at the same time, the output will be shut, and the solar will charge the battery.
①AC indicator(GREEN=Grid Normal; OFF=Grid Abnormal)
② Solar indicator(GREEN=PV normal;OFF=PV abnormal)
③ Wind indicator(Only available in NKW series)
④ Battery indicator(GREEN=Battery Voltage Normal; RED=Battery Voltage Low)
⑤Inverter indicator(GREEN=System Working Normally; OFF=No Output)
⑥ Fault indicator(RED=System At Fault; OFF=No Fault)
⑦ Power on/off button(Long press 2 seconds or more to turn on, and long press 2 seconds
until the buzzer ring to shut down. If solar or Grid is normal this button will not work)
⑧ Setting button
⑨ Select button
⑩ Flip-screen button
NOTE: Having solar or mains input, the system will start automatically
|Input voltage waveform||Pure Sine Wave(mains or generator)|
|Working voltage range||(165–265)Vac|
|Bypass output Voltage waveform||Same as Input Waveform|
|Overload protection||Breaker On|
|Short circuit protection||Breaker On|
|Switching time (AC to DC)||5ms|
|Switching time(DC to AC)||5ms|
|Bypass Max input current||17A/28A|
|MAX charge BAT current||20A/32A|
|Output voltage waveform||Pure sine wave|
|Rated output capacity(VA)||3000||5000|
|Rated output power(W)||3000||5000|
|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|
|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 input OC voltage range||(75–150)Vdc|
|MAX input current||40A|
|MPPT output current(MAX)||60A||100A|
|Charging Battery Current||(20–60)A||(20–99)A|
|Auto temperature compensation||Setting value-（MAX -25℃）*0.018|
|Output voltage lines wave-peak||200mV|
|Type||Wall Mount||Wall Mount|
|Net Weight (kg)||32||45|
|Operating Temperature||0℃–55℃; within 35℃–55℃, the rated output power had to reduce 2% when the temperature increase 1℃|
|Altitude||<3000m(more than 1000m, the rating power of each increase of 1000m decreased by 10%)|