Leonardo is an energy consultant with experience in many solar projects funded by the Inter-American Development Bank, in large commercial and industrial buildings. He specializes in feasibility analysis for solar power, which includes calculating the payback period and return on investment offered by solar panels.

Two solar installers installing a large set of solar panels to the roof of a house

Why are Solar Panels so Expensive?

Why are Solar Panels so Expensive? Solar panels are expensive because they use large amounts of high-purity silicon, and they require qualified installers. They must also be complemented with inverters and electrical protections to provide a reliable power supply. However, the savings achieved by solar panels during their service life are normally much higher than …

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An image showing the difference between a monocrystalline and polycrystalline solar cell

What Are the Differences Between Monocrystalline and Polycrystalline Solar Panels?

What Are the Differences Between Monocrystalline and Polycrystalline Solar Panels? The main differences between monocrystalline and polycrystalline solar panels are their efficiency, color, shape, and material composition. Monocrystalline panels have solar cells made from a single silicon crystal, characterized by their black color and higher efficiency. Polycrystalline panels have cells made from multiple silicon crystals, …

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two different solar panels installed on a roof

The Different Types of Solar Panels

What Are the Different Types of Solar Panels? Most solar panels used in homes and businesses can be classified into three types: polycrystalline, monocrystalline, or thin film. There are many ways to manufacture solar panels, and this determines their final appearance. The different types of solar panels are easily identified based on their appearance, and …

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the stacked up solar panels with an energy efficiency chart on top

Understanding Solar Panel Efficiency

Understanding the Fundamentals of Solar Panel Efficiency Typical solar panel efficiency ranges from 15% to 20%, and the most efficient solar panels commercially available are slightly above 22%. Some laboratory prototypes have reached efficiency values over 40%, but they are still very expensive and not viable for commercial use. In simple terms, solar panel efficiency …

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a small diagram to show the different parts and operations of solar cells

What are Solar Panels Made Of?

What Are Solar Panels Made Of? Most solar panels are manufactured from silicon. Depending on how silicon is processed, it can be monocrystalline, polycrystalline, or amorphous. Crystalline panels are the most common, while amorphous silicon panels are part of the “thin-film” category, which is used less. Solar panels generate electricity without moving or producing noise, …

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man checking on the status of his solar panels

How Long do Solar Panels Last?

How Long Do Solar Panels Last? High-quality solar panels last more than 25 years, and their payback period is only between 4 and 8 years. If you purchase panels with a solid warranty, the return on investment is assured. However, keep in mind that warranties are only valid if the panels are installed properly. Working …

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solar panels on a house and a man with a calculator

Are Solar Panels Worth It?

Are Solar Panels Worth It for Your Home? If you have a good site for solar panels then they will be worth the investment. Every $1,000 invested upfront will yield over $3,000 in savings during the next 25 years. Solar panels are like any other investment, where capital is spent in exchange for a greater …

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a small diagram showing how solar panels work

How do Solar Panels Work?

How do Solar Panels Work? Solar panels work by converting sunlight into electricity at the atomic scale. When solar cells are struck by light, they produce a flow of electrons, or electric current. Since this process happens at such a small scale, it is invisible for humans. Compared with other renewable energy systems, panels are …

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