Solar Knowledge - Shenzhen Jinjijia Technologies Co., Ltd.

Solar Knowledge

Why Solar
      Environmentally friendly and cost-effective energy supply is one of the great challenges of the future . People have to find a better economic ,clean ,renewable energy , this is very important for the future energy demand .At present , solar energy and wind energy etc. green energy are already a fast-growing world market.
      Solar power is both a financially intelligent investment as well as an environmentally conscious one. It provides the following benefits:
Positive Financial Returns
      Many solar power projects are cash-flow positive from day one, based on creative and widely-available financing vehicles
Hedge against Rising Electricity Prices
      Solar electric power is not dependent on the existence, development or maintenance of a fuel delivery infrastructure, nor is it dependent on the cost of fossil fuels
      Renewable Power Generation
      Solar electric power is a 100% renewable energy source. It provides the advantages of other distributed generation systems without dependence on fossil fuels.
        Reliable and Low Maintenance
      With no moving parts, solar generation systems reliably power residential, commercial, public sector and power plant applications
Zero Emissions
      Solar power produces no emissions and no noise. As a result, it can be easily sited in densely populated urban areas on rooftops, parking structures or on the ground.

How PV Modules Work
      Put simply, photovoltaics (PV) are the direct conversion of sunlight into electrical power.
      It’s a process that involves the release of positive and negative particles as a result of the introduction of light into solar cells.
      The electrical circuit is created by many solar cells connected in series within special PV modules.
     The consequent physical reaction in the solar cells generates direct current, which can be converted to alternating current, depending on requirements.
      As the PV modules that perform this function have no moving parts, the system requires only minimal maintenance, and is silent in operation. Best of all, they generate electricity – without generating any of the harmful emissions currently threatening our environment and climate.

Types of PV Systems
      PV technology was first applied in space, by providing electricity to satellites. Today, PV systems can be used to power just about anything on Earth. PV systems operate in two basic forms.

      Grid Connect PV Systems - These systems are connected to a broader solar electricity network. During the day, the solar electricity generated by the system is either used immediately or sold off to electricity supply companies. In the evening, when the system is unable to supply immediate power, electricity can be bought back from the network.

       Stand-Alone PV Systems - These systems are used in isolation of solar electricity grids, and may be used to power radio repeater stations, telephone booths and street lighting. There is also a growing market for mobile PV in the boat and caravan leisure market. Stand-alone PV systems also provide invaluable and affordable electricity in the developing world, where conventional electricity grids are unreliable or non-existent.

Solar - Frequently Asked Questions
1. What is solar photovoltaic (PV)?
Photovoltaic means electricity from light.
A solar PV system uses the natural energy from daylight in the form of solar radiation to generate electricity. This is different technology to solar thermal systems used for heating and hot water.
2. Why should I install a PV system?
By installing a solar PV system you will be generating your own clean green electricity from the free energy of the sun. This will not only reduce your electricity bills but since energy use associated with buildings accounts for around 50% of the CO2 emissions, installing a PV system will also help reduce greenhouse gases.
3. What is a PV system made of?
Solar PV systems are most commonly made from silicon, the second most abundant element in the planet crust, usually in crystalline form. The modules (sometimes referred to as a “panel”) are made from PV cells usually behind glass that are linked together in series like batteries in a torch to generate power output in the form of direct current (DC). A number PV modules can be connected together to give the desired electrical output.
4. How does it work?
A charge is placed across the cell and as the energy from the sun hits the silicon, an electron is released from the atom. Due to the charge across the cell, this electron then flows towards the positive layer. Once you have an electron flow, a current is generated. This direct current is converted by an inverter in the system to an alternating current (AC) at the same level as the national grid.
5. Will it still work on a cloudy day?
As the electricity generation is dependant on light intensity and not direct sunlight it will work in cloudy conditions but the greater the intensity of the light the greater the flow of electricity. Hence you generate more on sunnier days but the system will still produce electricity on cloudy days.
6. How much will it cost?
There is initial capital outlay to install your system which can be subsidised by a grant under the low carbon buildings programme. Once installed, since daylight is free, the system generates free electricity that requires very little maintenance with no moving parts.
7. Will it produce greenhouse gases?
PV systems generate electricity without producing emissions of greenhouse or any other gases. Based on the current electricity mix, every kWh of electricity delivered to your premises from the national grid will have produced 0.43 grammes of CO2. At 800kWh per kWp this will save approximately 344g of CO2 emissions every year.
8. How much space do I need?
Sharp 175W modules are approximately 1m x 1.6m. Therefore a 1kWp system will require around 6 Solar modules or a space of approximately 8m2.
9. Where can I install a PV system?
A PV system should not be installed in shade such as from other buildings or large trees since this will decrease the output from the system. However, although generally installed on a roof, they can be installed on any surface such as facades, sunshades, garages or ground mounted. They are normally installed in locations that receive sunshine through most of the day i.e. from East through South to West. However, maximum output will be facing due south and between 30-40 degrees from horizontal.
10. Do I need planning permission?
Some authorities require planning permission especially for listed buildings or within a conservation area. Although planning permission for solar PV is not generally required, Sharp recommends that customers should always check with their local authority before having a system installed.
12. How much will a system cost?
There are a number of factors that contribute to the cost of a system including the size of the system, module type, component parts, whether new build or retrofit, accessibility such as scaffolding requirements and labour costs.
13. How do I get a PV module from SinoSola and Where can I get further information??
Please visit our website and send us email or call us.