日前，诸侯快讯自主研制的500kw光伏并网逆变器顺利通过了由国家太阳能光伏产品质量监督检验中心进行的“中国效率”测试。

在太阳能转换为电网可用电力的过程中，光伏逆变器承担着“桥梁”的作用，其转换效率的高低直接影响到系统发电量。欧美发达国家早在1990年与2004年已分别颁布实施了相关的技术标准及法规，而我国一直以来使用最大逆变效率来评价逆变器的性能。实际工作中，逆变器不会一直工作在“最大转换效率”负载点，其输入电压以及负载点会随辐照度和温度的变化而变化，用最大逆变效率来评价逆变器的性能显然不够准确。

“中国效率”综合考虑了中国典型地区的日照资源分布情况、气温等影响因素，还考虑了不同负载点的权重系数，该系数体现了太阳能资源的分布情况，是更加科学、权威的效率评价体系，也是更贴合中国实际情况，更有说服力和参考价值的评价体系。

此次埃菲生根据光伏制造行业规范的新要求，率先进行了中国效率测试，测试结果优于行业标准，这不仅是对埃菲生研发实力的认可，也标志着埃菲生逆变器产品技术水平的进一步提高，更为埃菲生在光伏逆变器市场从价格竞争转入性能竞争时代提供了强有力的技术保障。

A few days ago,500kw grid tie inverter developed by Zhejiang Eifesun Energy Technology Co.,ltd passed  “China efficiency” test,which hold by National solar PV product quality supervision and inspection certer.

In the process of solar energy converted into available electric for grid,photovoltaic inverter act as the role of “bridge”,its conversion efficiency directly affects the system capacity.

The European and American developed country have been issued respectively by relevant technical standards and regulations as early as in 1990 and 2004,but the biggest inversion efficiency has long been used to evaluate the performance of the inverter in our country.In practical work,inverter will not working at the load point maximum conversion efficiency,its input voltage and load point will be with the  change of irradiance and temperature change,it’s not accurate enough to evaluate the performance of the inverter with the maximum conversion efficiency.

“China efficiency” considering the sunlight resource distribution,temperature etc in typical areas of China,also considered the weight coefficient of different load point,this coefficient reflects the distribution of solar energy resources,and is more scientific and authoritative system efficiency,and more fit the actual situation of China,also more convincing and the reference value of the evaluation system.

This time Eifesun according to the new requirements of the photovoltaic manufacturing specification, pioneered the efficiency test,and the test results better than the industry standard,this is not only recognition of Eifesun’s research and development,also marks the technology of Eifesun’s inverter is further improve the level of product,even more provides strong technical support for Eifesun from price competition into performance competition era.