Solar panel efficiency
Solar panel efficiency is expressed as a percentage. The current industry average is around 18%. High-performance solar panels can produce efficiency rates of over 22%, while budget products come in at around 16%. But that’s only part of the equation.
Long-term solar panel efficiency ratings measure how much a panel degrades over time. Less expensive solar panels often degrade faster and to a greater degree than higher-quality but more expensive panels.
The efficiency of solar panels is affected by a variety of factors including the type, size, location, temperature, and amount of sunlight.
panel power
For solar panels to be useful, they must generate at least as much energy as they replace. While efficiency ratings reflect how well a panel converts energy, its wattage measures the result in terms of energy. Most modern residential solar panel systems generate between 250 and 400 watts per hour while producing energy. In general, panels with higher wattage are preferred over panels with lower wattage. However, your needs and budget are factors when determining the output power of each panel.
temperature coefficient
This is especially important for those living in warm climates. A panel’s temperature coefficient rating measures the loss of efficiency as the temperature increases and is expressed in negative percentage numbers. A lower temperature coefficient rating depicts a solar panel performing better in hot weather than a panel with a higher coefficient rating. While panels with a lower coefficient rating may be critical in hot weather locations, they can also show remarkable results in locations that experience extreme temperature swings.
Your home’s energy needs
Depending on your household’s energy usage, you may need a system that generates more or less electricity. Make sure your system will generate enough electricity during the day and, if you want, provide enough power to get you through the night. Some solar users choose systems large enough to generate enough power to meet their needs, while others choose systems that allow them to live off the grid or even sell power to a local power provider.
Check Solar Panel Warranties
The typical product warranty for solar panels is 25 years. System components, such as batteries, inverters, and other vital parts, often have warranties that vary widely between products and manufacturers. Pay attention to these warranties and the 10- and 25-year warranty for the panels, especially if you plan to stay in the same home for a long time. Watch for performance warranties and manufacturer warranties.
Installation company availability and reputation
In addition to availability where you live, make sure the installation company you choose offers the panels and system components you want or their equivalent. Check reviews, references, and online quotes when choosing a company that can meet your solar needs. Look for quality assurances from the installer as well as manufacturer warranties. You can explore all of your options and find a local solar installer in your city or discover national solar companies that offer services in your state.
Available surface area
Planning your solar space depends on several factors. For example, how much space you have available on your roof or patio and whether you can orient the panels in the optimal direction are both critical factors that can limit your panel options. Smaller spaces benefit from fewer panels with higher wattage and efficiency, while homeowners with larger spaces available can benefit from having more panels and power options.
Solar Installation Recommendations
Solar energy systems are constantly evolving and improving. When making purchasing decisions, ask others who have experience owning a system what they have learned. Online reviews of solar panels, stabilizers, systems, storage, and other components are readily available, so you can find a well-reviewed product or service. Also, be open to recommendations from solar companies regarding your energy needs. In an ever-changing industry, there is always new information that can be helpful.
