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:
- How much electricity do you use on a daily basis? Include your refrigerator, TV, lights, and other appliances.
- How many hours of direct sunlight do you get each day?
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:
- Get bids from several contractors
- Ask each contractor if they have experience installing grid-connected solar systems. (A grid-connected system is one where you can sell-excess power back to your utility company.)
- Ask how many years of experience they have installing solar panel systems (not just solar hot water systems)
- Make sure that the contractors have appropriate licenses. Check with your Town Hall for local requirements.
- Ask for references, and then check them.