Frequently Asked Questions – Solar power system Photovoltaics
We have answered a range of questions frequently asked about the Swed Solar Systems. If your Question is not answered below, contact us via email.
The sun has produced energy for many millions of years and will do so for many millions more. It is estimated that there is still enough hydrogen in the sun's core to last another 4.5 billion years. Solar energy as we refer to it is the solar radiation (light and heat) that reaches the earth. Every day the sun radiates enormous amounts of heat and light energy. The planet and the atmosphere absorb some of this energy with the remainder being reflected back out into space.
The amount of solar energy reaching the earth's surface is 6000 times the amount of energy used by all human beings worldwide.
Unlike fossil fuels, renewable energy sources will never run out. Renewable energy facilities generallyrequire less maintenance than traditional generators. As their fuel is derived from natural and available resources, it reduces the costs of operation. Even more importantly, renewable energy produces little or no pollution such as carbon dioxide or other gases, and so has minimal impact on the environment.
The strength of the solar energy available depends on the time of year, the time of day, and the latitude of the generation point. The amount of energy generated can be further affected by the amount of dust and water vapors in the air, and the amount of cloud cover.
A solar module is a device which converts sunlight into direct current (DC) electricity. It produces electricity suitable for use in your home and for charging batteries.
Yes, there are various modules with different power ratings measured in Watts. Swed Solar Systems using Poly & Mono range of modules that cater for a variety of applications.
There are two types of solar systems, standalone and grid connect. Grid connect systems, often located in built up areas, supply solar electricity through an inverter directly to the household or the electricity grid if the system is providing more energy than the house needs. Standalone systems usually operate in remote areas, away from power supply lines or where supply can be unreliable. The electricity generated by the system is usually stored in a battery bank consisting of deep cycle batteries which are suited for repeated partial charge and discharge.
A simple standalone system would typically consist of a few solar modules, a solar controller, an inverter and a battery bank. Sometimes they work in conjunction with other forms of generators, for example wind or diesel, to charge the battery bank. A simple grid connect system consists of a few solar modules and an inverter which converts the DC electricity into AC and is connected to the power grid through the electricity meter.
This can be achieved by installing an inverter into the system. The inverter converts DC electricity into AC volts. Solar systems are versatile and can be designed for both AC and DC, or can be converted at a later date. Solar systems can also be expanded to grow with your needs.
There are various batteries which can be used. Car batteries are not very suitable for solar applications. Only solar batteries designed for repeated cycling (partial discharge, then recharge) should be used. Swed Solar Systems recommend batteries which are specifically designed for use with solar power systems.
Your total electrical demand (Load) can be calculated by your installer. You will need to provide them with information such as the number of lights, appliances etc. you wish to run off the solar system. You will need to state your average daily use which is listed in many electricity bills. The installer will then be able to calculate the kilowatt hours per day, or ampere hours per day, that the system will need to provide to generate complete supply.
Each system cost will be individually calculated by your installer according to your needs. Small solar power system costs start at around $1.5/w and a system to provide basic of the electricity for an average for home for on-grid. If you are installing a standalone system, the cost will be higher due to battery backup.Applications; however Customers in Western countries are still eligible for the Government Rebate which offers a rebate of up to 35%(Sweden) of system, which can also connected to the grid in Sweden.