We previously discussed what rooftop solar is, the pros and cons of solar power installation, and how to determine if rooftop solar is a good fit for your home. But it’s a big commitment; we’re sure you still have questions, as many people do.
We’ve compiled commonly asked questions about solar energy for homes and hope these answers will help you decide about rooftop solar.
Question #1: How long do rooftop solar panels last?
According to the Department of Energy (DOE), most rooftop solar power systems should maintain at least 80% of their initial power output for 25 years or longer. The National Renewable Energy Laboratory (NREL) states that the industry standard for manufacturing warranties is 25 years on a solar module. This should provide peace of mind that the investment will last a long time without surprise out-of-pocket costs.
Note: Panel quality can impact a rooftop solar system’s lifespan and long-term performance. If you get multiple estimates for a solar panel system, ask what the annual degradation rate of the panels being quoted is. This will help you evaluate quotes and make apples-to-apples comparisons.
Question #2: How do I maintain a solar panel rooftop?
Solar panels don’t typically require much maintenance. They just need to be kept free of dirt and debris so the panels can provide maximum output. In many cases, Mother Nature will help with this task. However, it’s also recommended to turn the system off a few times a year and spray the panels down with lukewarm water from a hose.
Remember that if you own your solar system, you’re responsible for its maintenance. Your system should come with specific instructions on maintenance and upkeep. But if you’re leasing your system, the solar company that owns it may maintain it per the leasing agreement.
Question #3: Will rooftop solar panels work on cloudy days?
Solar panels collect sunlight, not heat. This means that even on partly cloudy, rainy, or slightly snowy days, they can still generate some electricity. It’s estimated that panels will produce between 10% and 25% of their typical power capacity on partly cloudy days.
However, direct sunlight is always the best to maximize output.
Question #4: How will my home get electricity on overcast days and at night?
Homeowners have two main options for powering their homes when their solar panels aren’t producing electricity: using a solar backup battery and connecting to the grid.
During installation, you can add a solar backup battery to your rooftop solar system. This battery can store excess energy your system produces during the day, so you can use it to power your home at night or on overcast days.
Connecting to the electricity grid is another option. This allows you to use energy from a traditional electricity plan when your system doesn’t generate enough electricity to cover your needs.
Question #5: What if my rooftop solar panels produce more electricity than I need?
Producing more energy than you need is an excellent problem to have. If and when this happens, you can store excess energy in a solar backup battery for later use.
Another option is net metering. With net metering, any surplus electricity your rooftop solar system produces gets returned to the grid in exchange for bill credits applied to your monthly electricity bill. That means your net metering bill credits would be used before you pay a penny when you need electricity from the grid (such as at night or on overcast days).
Reliant Energy (Reliant Solar Payback Plus plan) and Green Mountain Energy (Renewable Rewards Buyback Plan) are two retail electricity providers that offer net metering options in Texas.
You can even combine the two options: fill your battery backup and then sell any additional electricity generated back to the grid.
Conclusion
As their popularity and affordability increase, rooftop solar will likely become a sustainable choice for more and more homeowners. By addressing frequent questions and common concerns, we hope we’ve given you information that will help you make an informed decision about investing in solar energy for your home.
After learning more about rooftop solar, you may be ready to have professionals provide estimates for solar power installation. Be sure to ask more questions during the process!
Or, you may have determined that solar panels aren’t suitable for your home yet. If that’s the case, you can still power your home with solar (or wind) energy by choosing a renewable energy plan. Visit EverythingEnergy.com to start shopping today.