Sunday, August 23, 2015

Emerging micro solar inverter technology

Discussion on solar energy systems tend to focus on itself, in the system the most obvious part of the solar cell module, and often overlooked another important part of the hardware is an solar inverter . The inverter is the solar panels into AC power of a component, which is home to what can actually use the DC power generated.


Some would say that the choice of the inverter is actually more important decisions than the solar module, since the solar cell module has played under the irradiation of sunlight gathered little "passive" role, while the inverter more actively manage it, while tracking data Record how much power is being produced.


There are two types of inverters: the classic central inverter and the emerging micro-inverter. Which one do you think is better. Central inverters have been used for more than 40 years. Micro-inverter is still a fairly new technology, only in commercial use for the past 10 years. Central inverters are usually installed on one side of the home near the main electrical panel, and micro-inverter is mounted on the back of the individual solar panel roof.


Central inverter required panel is divided into "string" or circuitry. If a panel strings with sun, causing it to lose production, all also affected in the string panel. However, with the micro-inverter system affects only pigmented shade single module; adjacent, unshaded panels still produce full functionality. Each micro-inverter is basically to manage their own independent solar cell module, rather than groups.

micro solar inverter



Similarly, the central inverter power of the entire solar system, and therefore, if the drive fails, the whole system to stop working until the inverter for repair or replacement. If the individual micro-inverter fails, the rest of the system is still working and productive forces.


About Inverter The most common question is about the warranty. Central inverter has a standard 10-year warranty, usually based on the size of the system, cost a little less; however, you can usually purchase an extended warranty. Micro-inverter is equipped with a standard 25-year warranty.


Not all brands of solar panels is compatible with micro inverter, due to its unique technology. It is very important to check with an experienced solar installation companies who can recommend the best system to meet your needs, both in terms of equipment and funds.


Stellar carry a variety of brands of central solar inverters and tingling micro-inverter, and since 1998 has been in the business, supporting the installation of commercial and residential solar energy systems, so we can at the right price with the right financing for home and recommend appropriate enterprise systems throughout San Diego.

Monday, August 10, 2015

Bullish the USA solar development - while the policy is not optimistic

Sharply reduce the price of PV systems in the past few years, but in 2012 and 2014 the cumulative effect of the decision of the Ministry of Commerce is to reverse the trend of cost reduction. If you look back to the spring of 2012, you will find the price of silicon component in the range of $ 0.80 to achieve the forecast price 85 / watt and modules at $ 0.55 to 6 yuan / watt range of analysts do not end in 2014, he said, We are nowhere near $ 0.55 to 6 yuan / W, in the United States in July 2014!


Currently, the cost of making the Ministry of Commerce, the US solar industry about $ 0.18 / W - and probably spend more at the beginning of next week. Now passed to the west coast of Mexico line Chinese module costs $ 0.58 / W. Delivered to the US West Coast same module cost American solar installation $ 0.76 / W. If not for a trade war, we can today buy silicon component in the US $ 0.58 / W or less!


A new report by the US Energy Information Administration forecast, by 2040 the new maximum generating capacity in the United States will come from natural gas and renewable energy. 830,000 kilowatts of new renewable energy capacity is forecast, nearly half are expected to come from PV systems.


 solar pv system




Today, solar energy is the fastest-growing US renewable energy sources, because the report confirms that this will continue to be years and years to come. Rapid deployment of a national solar energy will create thousands of new American jobs and pump billions of dollars into the US economy, and help to significantly reduce pollution.


Equally important, it will also provide the United States are free to decide how their homes, businesses, schools and government facilities to provide power in the future. The report predicts 60 percent in the next few years all new rooftop solar PV installation will be created to save significantly when it comes to future energy costs.


If there is no trade war with China, the US solar industry will be in a great location by the 2016 end of year trade war with the ongoing cost-competitive with grid power supplied to the grid by 2016 cost-competitive in serious danger in. Lost 30% of the solar investment tax credit is set to achieve cost-competitive solar energy industry back years.



Congress of the International Trade Centre provides the solar industry has proven to be an excellent catalyst for many years to allow a significant industry growth and fantastic cost reduction. Now, with the line of sight of the target industry, and the other branches of government action it is frustrating efforts to reduce costs, and could seriously damage the development of the industry forward. It is time for the government to get collective action to solve this problem before it causes irreversible damage US solar industry. I hope that parents solar Obama can lead the effort to solve this problem.

Sunday, August 2, 2015

Focus on the development of solar pv power plant

While most people who have embraced the use of sunlight to generate electricity idea, this particular approach is beginning to receive some reviews, today we look at the development of concentrating solar power plants and photovoltaic power plants, both concentrated solar power plant will have a greater share than that distributed solar systems.


When it comes to solar power generation from solar photovoltaic panels will also help in photovoltaic power plants, whether CSP or PV plant will prevail in the debate has been debated for several years, due to the lower prices of photovoltaic PV LCOE of CSP in years past It is about half the cost, and will continue to do so until 2030.


Solar energy is distributed better account of damage to the environment will provide the same energy is important to compare the same technology is very important. Bird death was caused by an electricity tower, distributed solar is considering PV. In fact, the photovoltaic power generation does not cause the death of birds, often, but still large-scale photovoltaic power plants and distributed relatively very interesting.


solar photovoltaic panels


Of course, the advantage of economies of scale photovoltaic power plants. On a global scale, multi-megawatt photovoltaic power station is to achieve less than 1 euro per peak watt. Largest photovoltaic power plant from the top 50 list of 50 megawatts to 300 megawatts or more can be found here. For the price of private housing investment may be a factor 1.5 higher, but in the field of digital capability has also been doubled recently.


On the other hand, the photovoltaic power plant without storage CSP plants like no challenge to its power grid produced a large amount of power is fed to the storage surface in. In this scale it on the electricity market competitive energy prices are often lower than the production cost. Each household can consume on their own, and may the subsidy, in order to obtain adequate remuneration for their produce electricity, but the utility to do so.


If the distribution of photovoltaic power generation is not evenly distributed, network integration issues will arise earlier, which should deal with the case-by-case, distributed PV can easily reach the size of a large power plant, but the optimal solution is not focused on having as many PV better. Renewable energy needs a clever mix of, among other factors, including solar, wind, biomass, energy storage will be necessary to overcome intermittent renewable energy production seasonality legacy.