Distributed generation policies will favor micro-inverter

In Europe and other countries photovoltaic applications earlier, "distributed" grid PV market has become mainstream, and look back at our country in recent years, more emphasis on large-scale popularization and application of large-scale power plants, related to statistics more than 70% of the photovoltaic installed capacity comes from large-scale photovoltaic power plants, "distributed" equipment accounted for only two percent. Relative to the large-scale photovoltaic power plants, distributed photovoltaic equipment mainly installed in homes, factories roofs fine, because the grid, tariffs, subsidies, and many other uncertain factors, therefore the popularity and development of distributed, will was recently a long way to go in the process.

Not long ago the relevant state departments in 2012 officially released "on the good services of distributed photovoltaic power generation and network views of the work" and other relevant policy documents, efforts to promote the domestic development of distributed photovoltaic power generation, to encourage units, communities and families Installation , the use of photovoltaic systems. Domestic "distributed" smooth opening of the market will undoubtedly become the PV production capacity to digest a new outlet.

Distributed photovoltaic power generationmicro-inverter to become the focus of much attention, the DC power conversion from a single solar module exchanges, each solar cell module is equipped with an inverter and converter function, each component can be individually currents conversion, and can level the panel maximum power point tracking (MPPT), beyond the central inverter has advantages, to optimize the output power of the module, the overall maximum output power.

Micro-inverters generally use reverse isolation topology, not inject DC bias current to the grid, DC side and AC side of the isolation, machine damage, solar panels will not affect the power grid; Second, each photovoltaic panels with a micro-inverter , no DC high voltage, there will be no risk of electric shock, no arc; each individual photovoltaic panels generate electricity, anti-shadow characteristics, the inverse of amicro-inverter is damaged, does not affect the power generation system; ease of installation, which for the United States and Europe expensive PV installation cost is a huge advantage.

It is reported that since 2009 Micro-inverter massive sales in the U.S. market has been gradually occupy the country with 30% of rooftop PV market share, this share continues to increase. And because micro-inverters are easy to install and use transformer isolation, Western countries have very broad market prospects.