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Frequently Asked Questions About Solar Panels

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Common FAQs About Solar Panels

In recent years, solar panels have gained popularity as a sustainable and cost-effective source of renewable energy. As the world moves towards cleaner energy solutions, many people have questions about solar panels. In this article, we will address some of the most frequently asked questions to provide a better understanding of this eco-friendly technology.

Some of the Questions are as follows:

Frequently Asked Questions About Solar Panels

Solar panels work by allowing photons, or particles of light, to knock electrons free from atoms, generating a flow of electricity. This process is known as the photovoltaic effect.

Yes, solar energy is renewable. It is a vast and inexhaustible source of energy that comes from the sun.

Solar energy works by converting sunlight into electricity using solar panels. This is achieved through the photovoltaic effect, where solar cells create an electric field that converts sunlight into usable electrical power.

Solar panels typically last between 25 to 30 years. However, they don’t stop producing electricity after this time; their energy production simply decreases to less than what manufacturers consider optimal.

The cost varies widely depending on the type and size of the system, but on average, residential solar panels cost between $15,000 and $25,000 before tax credits and incentives.

Most solar panels are made of crystalline silicon cells, which can be either monocrystalline (more efficient and expensive) or polycrystalline (less efficient and cheaper). Some are made from thin-film technologies using materials like cadmium telluride.

Some government programs, grants, and solar companies offer lease agreements or Power Purchase Agreements (PPAs) that might allow you to install solar panels with no upfront cost. However, terms and conditions apply.

In Arizona, the average solar panel installation costs between $13,000 and $18,000 after federal tax credits.

Pros: Renewable, reduces electricity bills, low maintenance, diverse applications. Cons: High upfront cost, dependent on weather, requires space, energy storage is expensive.

In California, solar panel installation typically ranges from $12,000 to $18,000 after federal tax credits, depending on the system size and other factors.

The size of the solar system you need depends on your electricity usage, the size of your roof, and sunlight availability. The average U.S. home requires a 6 to 8 kW system.

To fully charge a Tesla, you’d need approximately 8 to 12 solar panels, assuming each panel produces around 300 watts of power. However, this depends on the model of Tesla and the type of solar panel.

The average U.S. household needs about 20 to 25 solar panels to fully offset utility bills. This can vary based on energy usage and solar panel efficiency.

The federal solar tax credit allows you to deduct a percentage of the cost of installing a solar energy system from your federal taxes. As of my last update, this percentage was 26%.

The national average cost is between $15,000 and $25,000 for a residential solar panel system before tax credits and incentives.

The cost for solar panels installed varies but typically ranges from $15,000 to $25,000 for a residential system before incentives.

A typical LED TV uses about 1 to 2 amps. The exact value depends on the size and model of the television.

An average fridge uses between 100 to 400 watts of power. Over a day, it typically consumes about 1 to 2 kWh.

In Texas, the average cost of a solar panel installation ranges from $11,144 to $15,096 after the federal solar tax credit.

Charging time varies by model and the type of charger used. With a home charger, it can take between 6 to 14 hours to fully charge a Tesla.

The average cost of solar panels in Arizona is $12,300.


The installation of commercial solar panels typically takes several weeks to a few months, depending on factors like system size, complexity, and permitting. The timeline may vary, so consult with a solar installation company for an accurate estimate based on your project’s specifics.

About Wattmasters

With nearly 20 years experience as solar panel installers, and electricians for over 100 years and 4 generations – both on residential and commercial projects from small to very large – we very well may be the most experienced solar panel installers & electricians in Phoenix and all of Arizona.​

Although Watt Masters was founded in Phoenix, AZ in August of 1999, the history of our family’s company goes all the way back to the early 1900’s when our great grandfather, Gustav Bühler was installing the first electrical systems into homes in Germany! Over 100 years later, our commitment still remains the same – “Exceeding our customers’ expectations with a quality they can depend on.”


-Thomas Buehler, Owner

Rated "Best solar company in Arizona"

Since our start in 1999, Watt Masters has remained a Top-Rated Solar Installer in Phoenix, AZ.

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