Recently the state has introduced to support distributed generation policies and measures to encourage units , communities and families to install, use photovoltaic systems, photovoltaic power station construction orderly . From a global perspective, countries with good development of photovoltaic systems , such as Germany , Italy, USA , Australia and other countries, distributed PV PV development has been the main form , accounting for more than 80%.

Solid Dulwich PV inverters have been used in tens of thousands of distributed generation systems worldwide , has accumulated a wealth of experience. Based on in-depth analysis of the global distributed generation and forward looking projections , I think distributed generation system has five pillars:

The conversion efficiency , such as photovoltaic systems, converting sunlight into direct current through the solar panels ( panel conversion efficiency is 15 % -18 % ) , and then through the sine wave inverterdirect current into alternating current and connected to the grid ( inverter conversion efficiency , typically 96% -98.8 % ) ;

Inverter MPPT tracking efficiency. Conversion efficiency reflects a certain point , the system output power capability. MPPT tracking efficiency is reflected any point in time , the inverter system can track the maximum power point , to achieve maximum power output of the system 's capabilities.

Efficiency ( ie, conversion efficiency and the efficiency of MPPT tracking the organic combination of both ) is a distributed generation system to consider the primary factors that determine the ROI of the system , is the focus of the industry . Distributed power generation system has therefore become the first pillar . Solid Dulwich in this index reached world- class level. Latest ( December 2012 ) of the PHOTON test report shows solid Dulwich GW4KW-SS in the same power  wind grid tie inverter ranked first in the world , the whole world's top three series , the first Asia-Pacific region , the absolute leader in the domestic industry .

Renewable energy generally have intermittent characteristics, power instability, poor power quality , so wind power , photovoltaic power generation and even become "junk electricity" , or even abandoned or refused access. Measure power quality is an important indicator THDi, the total current harmonic distortion , distortion more powerful , power quality is worse. Accordance with international norms and requirements , THDi not exceed 5 %, otherwise the grid can be refused access. The industry standard is generally 2 % -3%. Dulwich solid indicators in this international leading level , the whole series is less than 1%. As follows :

In accordance with the dynamic view , if the current harmonic distortion power plant 2% -3 %, 5 years later may decay to 3% -4% , after 10 years may exceed 5% , so there may be banned plant connected to the grid ( and as a distributed system generating capacity in the power grid to increase the proportion , the grid is likely to improve THDi standard ) . So , THDi is distributed generation systems need to focus on the second pillar .