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Solar panels have been around for over half a century. Now, as the technology of solar electric panels has advanced over recent years, they are seen as one of the principal [link widoczny dla zalogowanych] sources of alternative energy.
What are the benefits of solar panels?
?·They are a source of renewable energy
?·They provide an independent source of electricity
?·Solar panels are non-polluting and cause no harm to the atmosphere
?·Once a solar energy system has been installed it is a free energy source
?·Solar cells require very little maintenance as they have no moving parts
?·Solar panels can last a lifetime.
?·In some countries government grants are available to encourage the fitting of renewable energy sources for your home
The only real downside is the initial cost. Solar panels are not cheap to purchase and have installed. The savings gained by having a solar energy system installed in the home accumulate over about 10 years to repay the cost of the solar energy system. After that your energy is free.
How do solar panels work?
They work by absorbing sunlight and converting it into useful energy. The panels are made up of solar cells (photovoltaic cells) arranged in a grid, which collect the sun???s rays during daylight [link widoczny dla zalogowanych] hours and convert their energy into electricity. The solar cells within the panel function in a similar way to semiconductors. The energy generated from light photons hitting the surface of [link widoczny dla zalogowanych] the solar panel knock electrons out of their orbit and releases them. The electric fields in the solar cells pull these free electrons in a directional current to the metal contacts in the solar cell which can generate electricity. The greater the number of solar cells in a panel, the greater the electrical output the [link widoczny dla zalogowanych] solar panel can produce.
How much power do [link widoczny dla zalogowanych] solar panels produce?
The efficiency of a solar [link widoczny dla zalogowanych] panel, and how much energy it produces, depends on [link widoczny dla zalogowanych] the climate, weather and number of [link widoczny dla zalogowanych] daylight hours of the location where it is installed. They produce most energy when exposed to direct sunlight in clear skies but will also produce a reduced amount under cloudy skies. All PV solar panels are affected by [link widoczny dla zalogowanych] heat. The hotter the solar panel, the lower the power output (20% to 40%). This means that power generation can be higher in winter than summer despite the fact that the sun is lower in the sky.
The maximum power a solar panel can produce [link widoczny dla zalogowanych] and the actual power it delivers are not at the same - the actual power depends upon the amount of light energy falling on the panel.
Most solar panels are labelled with their peak power output - this is the maximum power (measured in watts) [link widoczny dla zalogowanych] that the panel can generate in full sunlight. Work out the power produced by finding out the number of ???peak sun [link widoczny dla zalogowanych] hours??? your location receives each day, then multiply the watt rating [link widoczny dla zalogowanych] of the solar panel [link widoczny dla zalogowanych] by the number of peak sun hours. Sun hours will vary [link widoczny dla zalogowanych] by season with the lowest being in the winter.
Solar panels are an investment in the future. You can look forward to your own independent power supply and once you have paid off the cost of installing your solar power system you will effectively have free electricity. With ever rising electricity prices that can't be bad.
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For lots more information on solar panels and how investing in a solar energy system can benefit you, visit at William is a solar power enthusiast and has been for many years.