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How to Buy Solar Panels

Switching to solar panels or solar tiles to meet your home's energy requirements can prove to be a valuable investment. Solar power can help you reduce your electric bill and contribute to saving the environment. It can also increase the value of your property.

On the flip side, the US Government notes that "Generally, the cost of [solar]... energy is higher than energy bought from your local utility."

Solar panel modules can be installed or integrated on to your roof or on the ground. When the sunlight comes in contact with the solar panels, it is converted into power. The power goes through a solar inverter, which converts it into alternating current and passes it on to your home through a service panel. If you produce more energy than you need, the excess can be run back through your meter into your electric company's grid and directly reduce your electric bill!

Collect Some Basic Information

Before making any major investment, you need to do some basic research. In this case, you need to collect some basic information:

  1. How much electricity do you use on a daily basis? Include your refrigerator, TV, lights, and other appliances.
  2. How many hours of direct sunlight do you get each day?
The contractor that you hire to design and install your system will help you with these calculations. However, this page explains how to calculate how much electricity you use and this page explains how to calculate how much direct sunlight you receive.

Another issue to consider is the risk of hail damage. If hail is common where you live, there are some basic tactics you can use to minimize your risk.

How much Solar Power do you Want?

Most residential solar panel installations are designed to offset a portion of the electricity that your home or office consumes -- but not all. That's because it is often dramatically more expensive to generate 100% of your electricity needs than to generate 80% of them.

Consider the following: suppose that in an average month, you can meet 110% of your electrical needs from 20 meters of solar panels. However, every couple of years, you have an odd month where the weather conspires against you and the combination of snow and clouds means that you can only generate 30% of your electrical needs. If you are designing a system to meet 100% of your needs, you now must look into battery backups, or dramatically larger arrays of solar panels. Your costs have increased substantially just to handle the odd month every couple of years.

The Payback Period

The payback period is the amount of time it will take for your system to pay for itself in energy cost savings. Payback is calculated based on the current energy bill and the cost of your system. This will vary among systems. Small systems may have a payback period of 15 years while larger systems may have a 12-year payback period. The life of your solar panels typically ranges from 20 - 40 years, with manufacturers offering a 25-year warranty across the industry.

Hiring a Contractor to Install your Solar Panels

As is probably clear to anyone that has read this far, the contractor you choose will have a substantial impact on the success of your installation. Here are several suggestions for how to choose the best contractor:

If you aren't sure who to hire, the Roofery has partnered with HomeAdvisor to provide a network of solar panel installers in the US and Canada. ServiceMagic has an extensive screening process for all of its contractors. Their service is quick and free, and you are under no obligation to use the contractors that they refer you to.