With more and more people installing solar power these days, solar panels are the most critical part of any solar system installation. So how to choose solar panels is what we need to consider, mainly through the following factors.
1. Solar panel efficiency
Solar panel efficiency refers to the ratio (expressed as a percentage) of the solar energy hitting the surface of the panel to the electrical energy produced by the module.
For example, if a solar panel captures half of the energy in sunlight, the conversion efficiency of the module will be 50%. Under real-world conditions, the efficiency of conventional solar panels varies from about 15 percent to just over 21 percent. The higher the efficiency, the more power the panel gets per square meter. So the higher the efficiency - the smaller the solar panel becomes for the same power output, the less roof space is required.
2. Solar panel cost
When calculating the cost of a solar panel, the obvious calculation you need to make is: How many watts of power do you get per $1 module, or how many dollars per watt?
For example, premium solar panels can cost anywhere from $67c to $1.60 per watt. This is for panels only and does not include other mounting system bracket components or mounts.
3. PV module quality and warranty
Generally, the quality of solar panels can be used for more than 20 years, and the warranty period is at least 10 years. So choosing a solar panel for its quality and warranty is an important consideration.
4. Solar Panel Specifications
Like most products, solar panels can have different specifications to indicate their technical attributes. These specification attributes require special attention when making your choice:

• Power tolerance (ie do you get 300W or 300W +/-10%?).
• Rated voltage and temperature coefficient. For safety, the panel should be rated for a minimum of 100V DC. A good temperature coefficient rating can indicate that the solar panel will perform slightly better at higher temperatures.

These are some of the key factors to consider when purchasing a solar panel. Since a solar system is a complex system, including modules, inverters, solar mounting brackets and cables, each component requires careful consideration.

Wintop is a professional manufacturer of solar mounting brackets, including solar panels ground mounts, solar panel roof mounting brackets, solar carport structures, agricultural solar system, solar tracking system components.