Solar panel installations can be a very eco-friendly source of power for your home. But you'll want to know all you can about the process of getting them installed before the day of installation arrives. For example, you may want to know how long the installation is likely to take.

Your contractor can likely give you an estimate, but the job details and other variables may affect the actual job time. Here are four things that may affect how long your solar panel installation process may take.

1. Location of your solar installation

The location is the first potential variable. For example, if your solar installation will be on a roof, the process may take more time. The workers will have to use safety precautions and walk carefully to avoid damaging your roof and will have to take extra time hauling materials up and down from the rooftop. Or if you're installing solar panels in a spot far from the road with no vehicle access, the job may take longer because workers will have to haul all the materials a long way to the site.

2. Preparation and method of attachment

Some types of solar panel installations are easier and quicker than others. For example, if you have a standing seam metal roof, you can use solar panel installation brackets that simply snap into place on the roof seams. Once these are in place, adding the solar panels is relatively easy. If your installation will require drilling through the roof to anchor the panels, on the other hand, it may take longer. This method may be necessary with roofs such as asphalt shingle roofs.

3. Type of solar panels you choose

Some types of solar panels may take longer to set up than others. Several different styles and types of solar arrays are available for residential installation. For example, you can have a traditional array made of raised panels, or you can choose solar shingles or even flat panels that roll out onto your roof (called thin-film solar panels).

4. Expertise and number of workers

As with any project, a solar panel installation may be quicker if plenty of people are involved. If only one worker is available for the project, it could take longer. You can talk to your solar installation contractor beforehand to discover how many workers will be available for the project. The expertise and technical ability of the workers are important as well. Well-trained workers are less likely to make mistakes that will set back the project, and they can work quickly and efficiently.

These are a few of the factors that can affect the length of your solar installation project. Contact your local contractor today to learn more.