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Solar Panel Installation -- How To Do It

By John Greenspan

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Solar panel installation may be a daunting task for many people. On top of common DIY skills, you are required to know where and how to site your photovoltaic panels. There are also potential dangers involved. While installing on roofs, you are exposed to the danger of falling. You are also at risk of electrocution as wire your inverters.

But we do not have to be discouraged. Knowing what to do can help us tremendously and keep us away from danger. Some important installation know-how can make your job much safer and easier. Here are some points to consider before you install your solar panel...

In the northern hemisphere, we'd like our photovoltaic panels to tilt towards to south so that it can receive the most sunlight throughout the year. If we have a south-facing roof, all we need to do is line the solar panels along the surface of the roof. Otherwise we'll need additional brackets to tilt the photovoltaic panels toward the south.

The roof is usually the best place to site your solar panels, but there are exceptions. Therefore you have to do a thorough survey to know where is the best place to locate your panels.

During the survey, you'll have to take into consideration shading from plants and nearby structures. Shading has an adverse effect on solar energy production. The amount of electricity generated by photovoltaic cells reduces by a significant percentage with slight shading.

Through different seasons of the year, the position of the sun changes. So you'll have to take this into consideration. An easy way to find the location that receives the most sunlight throughout the year is to use a Solar Pathfinder. This instrument shows you at a glance where shadows will be at different times of the day and different seasons of the year.

If the ideal location is on your rooftop, you'll have to find out the maximum loading your roof can withstand. If the solar panels are too heavy, you will need to provide additional reinforcement to the roof structure before installation.

After the location is finalized, actual work can begin. You'll have to get the correct solar panel mount to fix them at the ideal place -- there are pole mounts, roof-ground mounts and flush mounts.

When installing on roofs, we frequently use flush mounts. This is the cheapest and easiest way to mount small solar panels. These are metal brackets that support both ends of a solar panel. It elevates the solar panels a few inches away from the roof to form a gap in between. This allows air to flow through, cooling the solar panels. It is vital to moderate the solar panel temperature so as to maintain the efficiency of photovoltaic cells.

Roof-ground mounts are grid-like structures that are used primarily for large panels. They can be installed on the ground or on roofs. A pole mount is used mainly for supporting a small, single solar panel.

After the solar panels are fixed, you'll have to run and connect the electrical cables. The actual connections depend on whether you want a grid-tied or off-grid system.

With proper solar panel installation, each panel will be able to withstand strong winds and work efficiently for decades. You can also expect your property to increase in value with a solar energy system installed.

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