Is the core facility of solar power plant and wind turbine power plant.To sure the power plant can run stability,it highly require for the reliability of the grid-connected inverter.For the scurviness environment of the solar and wind turbine,the stability of DC supply is very bad,that more require to consummate the defencive function of grid-connected inverter and strong capability to resist all kinds of impact. 
EHT grid-connected inverter,with top-ranking technology,is developed by our experienced engineers.Since put into production for oneyear,has exported a great deal to Sweden,England and Germany.(mainly 1KW,2KW,3KW,5KW,15KW,25KW,60KW)Up to now there still zero defects. 
EHT Grid-connected Inverther Characteristics:
1,controlled by CPU,to keep the stability of the unit.
2,inverter grid-connected output,can follow up the utility grid in millisecond,completeness synchronization to the utility grid.
3,when utility grid test by inverter in three seconds is normal,grid-connected inverter start to work.make sure the inverter will not damage by frequence wave. 
4,it will lock the unit automatically in less than 10ms when the utility grid interrupted or over-voltage or under-voltage. 
5,protectin against short-circuit and overload. 
6,outout power invariablenes.(normal DC voltage) 
7,when wind power or solar power shortage,DC voltage drop,grid-connected inverter output power will reduce.When DC over low achieve inverter Dc protect point,inverter will automatically lock and stop work,when DC restores,it will start the unit automatically again. 
8,when wind power over-voltage(such as typhoon),or solar intensity over strong,DC overvoltage,inverter will automatically lock itself.When DC restores,inverter will start to work automatically again. 
9,communication ports:RS232,RS485,USB(optional) 
10,DC to AC high transfer efficiency up to 90---96%
Model Explain:NB-S6KW1 
NB:stand for grid-connected inverter 
S:stand for inverter special for solar sysem,W:stand for inverter special for wind power system 6KW:stand for inverter efficiency 
1:stand for single phase 
3:stand for three phases

1 Grid-Connected Inverter Special for Solar System
Renewable energy resources solar grid system is use the PV modules produce energy,across grid-connecter inverter give feedback to utility grid directly,do not through the battery.
2 Grid-Connected Inverter Special for Wind Turbine 
wind turbine system have single unit and multi-units connecting to utility grid.single wind turbine system is used in single wind turbine system connected to the utility grid,multi-units connecting to utility grid is used inlarge-scale wind electric fied group.for an example,in a -large wind electric fied group,there are 100pcs 30KW wind generators,so 100pcs30KW inverter connecting in parallel merging into the utility grid,total capacity is 100*30=3000KW.any one is faulty,it won't affect other equipment working.
Because of renewable energy resource input to utility grid directly without battery,spare the battery stored energy and release process.We can fully use the electric power produce by renewable energy resource.Reduce energy wastage and system cost. Wind turbine systemcanuse main and renewable energy resource by way of local AC load electrical source.reduce the whole system power load shortage rate.At he same time, wind turbine system can peak moluation of public use utility grid.Due to wind turbine system cost much lower than solar sysem,it practicabiliy boost up.Grid-connected inverter is the development aspect of solar and wind turbine.It represent the most attraction energy utilizatin technic of 21century.

EHT grid-connected inverter special for solar system working principium:

EHT wind turbine grid-connected inverter working principium: