What is Solar Panel Efficiency

When you look at solar panels, you will notice numbers like 15% efficiency or 30% efficiency panels. Some types of solar panels are thought about high efficiency panels, such as panels made from multi-junction solar cells.


Multi-junction solar cells can absorb a wider range of the spectrum of solar light. Each cell is layered with different materials, and each layer of the cell can absorbe a specific frequency of light.

Some solar specialists say that a solar panel with 30% efficiency will be able to pay for itself within seven years. These types of high efficiency panels can help make solar energy more affordable, because the average life expectancy of a solar panel in ten years.

That means in case you use a high efficiency solar panel, you'll be enjoying free electricity after your sixth year.

Another factor to think about is the longevity of the solar panel. How long is it expected to last? Some important things to find out are:



Does your panel have a warranty?

Is it made from sturdy ingredients that are likely to last?

Is the manufacturer of the solar panel likely to still be in business in 15 ot 25 years when your solar panel warranty expires?