we have produce on grid inverter for more than 10 years, it have good quality, low price and frist class service.

1. Controlled by CPU, steady and reliable;
2. Inverter check the utility grid that can normal work in 3 seconds, the inverter began to utility grid work ,and make sure inverter not to be damaged by frequency wave;
3. Inverter at utility grid work will lock automatically in 10 seconds when utility grid appear interrupt, over-voltage and low-voltage;
4. When the wind power is overtop or the sunshine intensity, bring about the DC over-voltage, inverter will lock automatically; when the DC restore work, and then inverter restore work and began to output with utility grid;
5. It have short-circuit, overload protections, etc.

Specification

Model	NB-S,NB-W Series
Power range	30kw
DC voltage range	300V-360V
THD	≤3%
Power factor	≤0.99
DC to AC transfer efficiency	90~95%
Allowable electric net voltage range (AC)	175V~265V(single phase)
	304V~450V(three phases)
Allowable electric net frequency range	50/60HZ
DC access type	Group terminal block+DC switch
AC access type	Group terminal block+AC switch
Night power expenditure	0W
Communication ports	RS232,RS485,USB(optional)
Protections	Short-circuit,reverse polarity,lone-island            domino effect and over-load protection
Operational environment temperature	-10°C~+40°C
Electric net control	According to UL1741 and IEEE-2000 standards
Electromagnetism compatibleness	EN50081,PARTI EN50082,and PARTI
Utility grid disturbance	EN61000-3-2
Utility grid test	DIN VDEI126