On the Roof of the Photovoltaic Business Opportunities, Chinese Dream

Recently, China lowered GDP growth triggered a lot of discussion, a lot of people on the Chinese economy whether is in the healthy operation of generating a lot of questions, even lose confidence in the future economic trends. In this regard, "Economic half-hour" deep into the first line of the socio-economic production, to present you the real Chinese economy. New energy solar photovoltaic power industry is considered to represent the new economy, but mention the photovoltaic industry and solar photovoltaic power generation, many people first reaction is this vocabulary of lower price competition, export-restricted and so on. If someone tell you, there will be a lot of families to install their own roof solar photovoltaic power systems in the future. Lying at home, not only can freely free use electricity, and even to use up the electricity sold to the national grid, do you believe it?　

First,Their power for their own use，rooftop solar power Supplying the national grid

Chunjiang Zhao is the director of Solar Energy Research Institute of Shanghai University of Electric Power, 2006 year he set up 22 pcs solar panels on their own roofs, built the first China personal home solar power station.

Chunjiang Zhao said his home solar power system is equivalent to a small 3 million watts of power plants, although compared to the hundreds of thousands kilowatts of large thermal power plants, it is very small, but his home solar power system is a very complete small power plants, from his home and sent to the conventional power plants firepower AC 220 volt power to issue and quality are the same.

As early as in a few years ago, Chunjiang Zhao is in their own roof built solar power station. 2012 years after he moved to the new home, then built a a new roof solar power station. Chunjiang Zhao said, in fact, family photovoltaic power generation principle is extremely simple: after the sun light irradiation, the series of solar battery assembly send out a DC power, through the inverter into 220V, 50Hz current can directly use. While the power equipment is particularly simple, only consisting of solar module, inverter, AC protection switch and a bidirectional ammeter.

Chunjiang Zhao believes that the future of these devices can be packaged together, like to buy a TV set, wait for professional personnel to install, we only need to calculate the site.

Family photovoltaic power generation cost is not actually high, Chunguang Zhao studied in Japan for many years, 2006 before he come back, Japanese family power station has reached 60 million. At that time caught up with Shanghai proposed 10 million solar roofs plan, annual household electricity in Shanghai hope to reach at least 330 million degrees. After returning Chunguang Zhao flew into RMB 120,000 to buy the solar power system components,. 2012 years he moved to Xinzhuang new home, also built their new photovoltaic system components and with the integration of the roof construction, with a total investment of only RMB 50,000.

Chunjiang Zhao now the solar power generator is 3.5 kilowatts, is theoretically per hour capacity will reach 3.5 degrees. Over the past year, this new system is generating more than 4100 degrees, his wife happily told reporters, now the home appliance use electricity casually, before the tank, air conditioning and TV is used with the mark, and now all opened. Before electricity need to be paid, in order to save one family all crowded in a room blowing air conditioning, but now no longer. She is feeling to feel the benefits of solar power, which makes their quality life has been a leap increase. In addition to their own home use, the remaining about 2000 kwh of electricity can enter the national grid. 

Chunjiang Zhao pointing to their own solar generator said, the weather is good today, now the power is 2500 kilowatts. Less than 11:00 has made more than seven degrees electric, today at least to generate 20 degrees, even are likely to 22-23 degrees electricity.

Now speaking of family photovoltaic power generation, Chunguang Zhao and his wife are smile, but 2006 when newly built home power plant, has attracted a lot of trouble. Remember when power station was built, the electricity sector were soon at the door, not to learn, but to send electricity payment bill. That had made Mrs. wife unhappy, she felt her husband lie her for their own power.

Because Chunjiang Zhao had promised his wife, installation home solar equipment, electricity almost don’t pay money. The power company who told them that electricity did not decrease, but also pay more than RMB 100 per month. Originally, this solar power system which electricity didn’t used up, then into the grid daytime. At night the station can not generate electricity, to get electricity from the grid. At that time, the power sector was one-way ammeter, unable to identify the direction of current, which causes both the current inflow or outflow, will be counted into electricity. That means more power generation, flowed into the electricity would be more ,so more payment. Moved to Shanghai Xhenzhuang new home, Chunjiang Zhao learned a lesson, directly to the Power Grid Corp apply for the installation of the bidirectional ammeter. 

Chunjiang Zhao, pointing to the bidirectional ammeter carefully explain to reporters, that when the meter display is the reverse active, means it is the outward transport power, is in delivering power to the grid. Now the reverse power is 0.05 kilowatt, home electricity is very large, TVU part are for home use, leaving only 0.05 kilowatt for outward transporting. Power reverse power is 2004.37 kW, the meaning is already to grid conveying the 2004 more electricity.

A little more than 2004 degrees, this is a total number of transmission power to Power Grid Corporation when reporters interviewed Chunjiang Zhao. If with their own electricity, then from 2006 to now, Mr. Zhao two sets of home solar photovoltaic power generation system, have a total generating 2.5 million degrees. The electricity in addition to the majority for home use, the rest have all been conveying into the grid.

Chunjiang Zhao said that before January 1, 2013, his two power plants generated the electricity are all free fed to the national grid. After, power grid company and he signed the network agreement, provisions of the electricity base price is RMB 0.4773 per kWh, but subsidies this piece has not clear. Although the power grid company year after year are talking about green electricity buyback, the price has not been finalized. Now the repurchase is not a problem, more important is to introduce a specific price policy. So, how much is the tariff exactly? Mr. Zhao is still waiting for relevant policies and implementation.

Beginning in 2013, Chunjiang Zhao whose home power also began to re accumulation, waited for the settlement. He also calculated an account, in accordance with the prices level of Shanghai, the investment a kilowatt of power plant is about 1.3 million, according to Shanghai sun's radiation, 1000 watts of annual power generating capacity is 1050 degrees, and the price of Shanghai should be set at about RMB 1.4, such 8 years could be guarantee recovery. Even countries bring the price down to RMB 1.25-1.3, 10 years can also be completely recycled. So, if the network price is the right, home power generation prospects are very broad.

Second,100,000 Solar Roofs Plan to implement Decade, Shanghai only six families to attend

Use the roof of home electricity, the remaining can send into the grid, but they did not think it would like to pay to the grid, Chunjiang Zhao embarrassing encounter were laughed by many people. 2006 Shanghai raised 100,000 solar roofs program, after five years the implementation of response was still a handful. Of course, that led to this plan failed for many reasons, the most important factor is easy to generate electric but hard to sell, but now the situation is changing. This year, March 19, Shanghai resident Jilin Chen from Power Grid Corporation got RMB 116, become the first person to self-built power plant in Shanghai to earn "extra money" .

Jilin Chen’s home power generation stations built in the third floor building on their own balcony, handmade wooden support above 11 solar panels, the panels are to be linked together, through the inverter to adjust and stable, the maximum output power is 2.5 kW and is 2.5 degrees per hour electricity. Mr. Chen told reporters that on and off grid solar power system device procurement were RMB 10000, plus the inverter assembly is total of RMB 15000, the cost is not high, now many families can accept.

Today, Shanghai's weather is cloudy, basically there is no big sun, in such a light conditions of power generation amount can reach 8.2 degree. If the weather is good, every day can send 15 degrees , every year can generate 2500 degrees. Remove their own electricity, the remaining electricity through bidirectional measurement meter input state grid, In this sense, Jilin Chen regard him as a supplier of power grid.

Then on March 26, Jilin Chen got the first sum subsidy from power company . The residents electricity balance sheet, is the collection of receipt display: Shanghai residents spontaneous self power the remaining send into grid which electricity settlement price standard temporarily is RMB 1 kwh, waiting for the relevant state policy clear, approval in accordance with the national Internet price to liquidation, retreat more fill less. Mr. Chen told reporters that contract temporarily according to the benchmark price, in fact, execution is by RMB 1 kwh because the power grid companies have no right over desulfurization benchmark electricity price contract on display, then they gave him fill RMB 127 price difference.

Get RMB 1 per kWh on-grid power tariff, Jilin Chen saw an opportunity, he told reporters that such a tariff, seven years will be able to recover the full investment, the life of photovoltaic power plants are more than 25 years. He gave his family a calculation, in previous years, a year in use electricity at home are about RMB three thousand, now his family installed a 2.5 kilowatts of photovoltaic power generation device, a year the basic unit of electricity can generate 2500 degrees, that is probably income RMB 2,500, can offset each year to pay RMB 3000, he can save 70% of electricity annually.

Now, Jilin Chen are intending to put the unused roof to install solar panels, expanded 2.5 kwh power to 3 kilowatt hours. So in addition to their own electricity were available, the annual power generation also make some money. He felt under this policy remains unchanged, this model can also be continuously replicated copies. He pointed to the nearby villa roof said, now there are a lot of empty roof, to install solar power system for electricity on the roof which market potential is huge

Home Distributed Solar Generator Power Station

Household distributed solar  generator power station, also known as distributed power plants, photovoltaic power generation, solar power generation, PowerOAK Newener Co., Ltd. regularly provide the new subsidies policy . Household distributed power plant is a new high-tech product, install household distributed power station not only save their own money but also earn more, to install you can contact the PowerOAK manufacturer, the price of distributed power stations will be changed with the power plant size . Generally each watt is about RMB 8-9.
　　
The calculation method of domestic distributed power plant cost:

First,To understand the solar power system composition price
Distributed home solar power system cost is generally calculated in accordance with the total package price. Therefore the price includes: preliminary design, procurement, construction and installation, grid service etc. That is to say photovoltaic companies to provide product equipment and artificial. It includes the declaration, program design, equipment procurement, installation and construction of the project, with the grid.

Second,To understand the influence factors of the price
Before said the price is the main contractor. Many factors influenced the main contractor price. More common is the transport, roof property, owners demand. Sometimes long distance construction, for the accommodation problem need into be accounted. Home distributed power prices have a bottom line, but also elastic.


Third,The cost of domestic distributed power plant
Nationwide, the distributed home solar power plant cost is RMB 8-12 per Watt for calculation. For example, a 100 square meters of the roof, you can do 10 kW, according to calculate with RMB 10 per Watt , finally the main contractor is RMB 100,000. The price includes design, equipment, construction and network. Specific price still need to unify the demand and installed capacity to determine.

PowerOAK experts warm tips: the cost of distributed home solar power plant is more flexible, which is affected by many factors, so want to more accurately understand it is had better communicate with PowerOAK company.




Posted by Sarah Hwong,Feb. 23,2016

The Advantage Of Solar PV Power Generation

Solar pv power generation means through absorbing the solar radiation to generate electricity, if only there is sunlight ,it can install the solar power system. The generate electricity process and principle of solar pv power generation are very simple, it doesn’t like the fuel generator to mechanical motion, or consume the fuel, even generate any hazardous substance or gas. Recently years, which is the new energy source using project strongly promoted all over the world. 

Why solar pv power generation become more and more popular in the world ? Specifically speaking, there are three main advantages as below :

First, energy source are free, and have a sustainability. Solar pv power generation via absorbing the sun radiation to generate electricity, the solar energy is the most precious free source which the universe present to our human being. According to the statistics, exposure to the earth solar energy is much bigger than our wasting energy about 6000 times, this source all around the earth, do not subjected to geographical and altitude factors limit.

Second, convenient to use. If there is sun light , it can install the solar power system to power supply. Flexible distributed, solar power system can be eight big or small, large to the solar power plant, small to our Poweroak portable solar generator, both can nearby power supply. That is to say, it is suitable for tourism, exploration, household lighting, pasturing area, field working, forestry home, island fishing boat, border posts and other areas without or lack of electricity power.

Third, no pollution, no pressure on the environment. All process of solar generating are physical, don’t burn the fuel, and will not generate any substance, no pollute the air, don’t make the noise, either. It is really a green environmental renewable energy source.

Besides, with the improvement technology of solar power system utilization, generating efficiency will be great progress, and these advantages will be more and more appeared. What’s more, The home solar power system will take a good market opportunity and have a great development.

Written by Sarah Hwong , Jan 22,2016

The Solar Photovoltaic Power System Disadvantage

Recently years, solar energy have been great promoted and developed. In western country many households and organization have installed solar power system to power supply. Solar photovoltaic power system advantage have become more and more acceptance. In China, government also come on the policy to encourage people to use the solar pv system. However, when choose the solar pv system, need to consider the using solar photovoltaic system disadvantage.

First, the energy density is low, solar panels floor space are large. Although the sun is a tremendous source energy, deliver the total energy of the earth is also great, really exploited is little, the energy density is relatively low. At present, conversion efficiency of the solar panels are still too low, which requires using a large area of solar panels to absorb solar radiation to produce a certain amount of electricity.

Second , it has a great effected by weather change for the electric consumption.
Solar photovoltaic energy source is the sun light radiation, greatly affected by cloudy, rainy and fog days . Due to different geographical location, resources of sunshine is also great difference , and subject to geographical restrictions.

Last ,the home solar power system cost is relatively too high. Using the sun light is free, but a complete set of the system device is too high. For consumer, use the solar pv generation cost is much higher than the public supply system, so there is no cost advantage. It also has been the biggest obstacle to troubled people to install solar power systems. Whether it can save electric charge to Install home solar power system, many people think that is. For the large pv system that is, but for the ordinary households, to invest solar pv power generation have no cost advantage.

Although solar pv power system still have many insufficient, with the increasingly seriousness of energy crisis problem, it will be an effective way to great develop and use the new energy. With the government support and technology development, the advantage will be more and more significant.

Design Home Solar Power Generator System Need to Consider These Factors

Written by Sarah Hwong ,Jan. 15,2016

Home solar power system can be either big or small, small to one or two hundred Watt, big to tens of kilowatts. For household, a too small system the power is not enough, too big is very waste , which requires according each household's actual demand for electricity to design suitable solar power system. In generally, Home solar power generator system designed mainly to consider the following factors:

1.Where is the solar power system used?

Climate conditions across the country are not the same, there is a great difference for the sun's light conditions, the amount of solar radiation directly affect the solar panels generated electricity.

2. How much load power to be used? how many hours per day to work??

The load power refers to the use electrical power, know the working hours can calculate the power consumption a day. Such as notebook computer power is 100 watts, if used 8 hours a day, the power consumption will be 800W . Each electrical power consumption plus together, can calculate a day’s total electricity consumption.

3. How many days does it need to be powered by a solar generator for homes, if it is to meet a rainy day without sunlight?

Solar power system can not generate electricity in rainy weather, which need to save the excess power in the light time, the number of days to use in the rainy days to determine the number of batteries will be used.

4.DC output or AC output ? What is the output voltage of system?

According to the using different environment of solar power system, output current can be AC and DC, the output voltage also have many kinds. In China, all household electricity are 220V AC output.

In a word, there are some differences for components and functions of the composition of solar power system, choose what kind of specifications must consider these above factors, and you can design a suitable home solar power generator system.

The cost of home solar generator system is too high to affordable

Installed a solar panels on the roof of our house, this home solar generator system is becoming the renewable energy solutions which have a prospect market. However, for the present  general public, to buy a home solar power system is very difficult as like a marrying pretty girl.

Nowadays, human beings are facing with the problem of energy crises, particularly in remote areas of many countries ,which have restrictions on the use of household electricity, frequent power outage is a very common thing. while for the power grids of the citizen, rising electricity charge also has become a big problem. Now thanks to advances in solar technology, people can use home solar power system to power-up . That could be a good thing for us. but the higher cost installation of solar panels has become a problem,too. The current situation is: home solar power system for the general public is too costly.

At present, the main reason of solar generator kit high cost installation is the solar panel modules which price are too high. As someone said, monthly electronic bills have already too high, so want to install a home solar generator system on the roof. Whereas , when knew the needed installation cost, he have found that could not pay for it. That is to say, for a general family, to install that system is not cost-effective.

Maybe you will say, the government should take a subsidy policy for the purchasing solar panel modules families. There is nothing wrong with it, many countries have done that. But we need to know only depends on the government support is not enough, especially in the difficulty economic period. In fact, all we hope that the researchers keep trying to improve the solar technology.

Use the technology to reduce the cost of solar panels. Only in this way, home solar generator system can be able to become a people affordable renewable energy solutions. Solar power system will Improve efficiency of energy utilization.