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Solar Panels on Roof | How does rooftop solar panels work?

Solar panels on roof

Solar panels on the roof can help to reduce the cost of electricity. Installing a solar array on the roof can be a great way to save money on electricity bills. This article will discuss how rooftop solar panels can help to reduce electricity costs.

How do solar panels work?

Solar panels work by converting sunlight into electricity. The sunlight is converted into electrical energy when the photons in the light strike the solar panel and create an electric field. This electric field causes electrons to flow through the solar power cells, which creates electricity.

Solar roof panels should be installed on a sunny, south-facing roof in order to get the most sunlight. Panels on roofs can also be installed on an east- or west-facing roof, but you will not get as much benefit from them as you would from panels installed on a south-facing roof.

Roofs are a great place for solar panels

solar panels on roof

Roofs are a great place for solar panels. They can be installed in the attic, on the roof, or even outside on shingles.

In order to install solar panels on a roof, you need to have an existing roof. In case the roof is asphalt shingles, then it can be replaced with solar shingles that look just like regular roofs. This will not affect how much light gets in and can make your rooftop more efficient.

There are a few things you need to consider before installing solar panels on your roof.

Is your roof ready for solar panels?

Before solar panel installation on your roof, you need to make sure the roof is ready for them. The roof should be in good condition and have no leaks. If you are replacing your roof, it might make sense to install solar panels at the same time. You also need to make sure there is enough space on your roof for the solar panels.

How old is your roof?

The average life of a roof is about 20 years. If your roof is more than 20 years old, you might want to consider replacing it before installing solar panels. Solar power systems can add an extra 10-15 years to the life of your roof.

What is the square footage of your roof?

The size of the rooftop solar system you need will depend on how much power you use. If your home uses an average of 800 kWh each month, then a 2 kW system would be enough to cover your usage. If your home is smaller or larger than that amount, you can adjust the size accordingly.

What type of roofing material do you have on your house?

The type of roofing material you have will determine the type of solar power system that works for your home. Most solar systems can be installed on asphalt shingles, tile, metal, or concrete roofs.

Types of solar panels

There are three major types of solar panels that extract renewable energy from the sun, they are:

Monocrystalline solar panels.

Monocrystalline solar panels are more efficient and stylish than polycrystalline solar panels, but they cost more. Monocrystalline panels offer higher performance, making them suitable for houses with limited roof space. Because monocrystalline panels are more efficient, you’ll need fewer of them to produce the electricity you require.

Polycrystalline solar panels.

Polycrystalline solar panels cost less expensive but are not as efficient. The lower efficiency ratings are due to the way electrons flow through the solar cell. Because polycrystalline solar cells contain numerous silicon cells, it’s more difficult for electrons to move, decreasing panel efficiency. The decrease in efficiency also makes mounting more panels to your roof necessary for generating enough electricity.

Thin film (amorphous) solar panels.

Thin film solar panels are the least expensive, but also the least efficient type of rooftop solar panel. Thin film photovoltaic panels are made of less-pure silicon, the process of producing them is cheaper. Amorphous cells don’t produce as much electricity as crystalline cells, but low costs make them a good choice for budget-minded consumers.

The size and number of solar panels will depend on how much electricity you want to make. It may also depend on your budget and the space available for installation.

How to install solar panels on roof?

To install solar panels on your roof, you will need to have an idea of how much sunlight reaches your home. If you live in a sunny area, then installing solar panels on the roof is a great option.

If you live in an area with limited sunlight, then installing solar panels on the roof may not be a good idea.

Bury Conduit and Build a Platform.

The first step in installing solar panels on your roof is to bury the conduit. This will allow you to run the wires from the solar arrays down to your electrical panel. You can either do this yourself or have a contractor do it for you.

Mount the Panels.

The next step is to mount the panels on your roof. This can be done either by yourself or a professional. You will need to make sure that the panels are facing south so that they can get the most sun exposure.

Secure the Rear Legs.

Secure the rear legs of the solar panel with roofing nails. Once you have completed this step, you are ready to connect the solar panel to your home’s electrical system.

Wire the Solar Modules.

Now it is time to wire the solar panel system. You will be wiring each solar panel together in a series, and then you will run the wires through your buried conduit into your electrical panel.

Understand the Wire Connections.

Before making any wire connections, be sure to understand how they work. There are three main types of wire connections: series, parallel, and series-parallel.

Connect the Cables to the Control Panels.

Once the solar panels are wired together, you will need to connect them to a control panel. This panel will allow you to monitor the performance of your solar panel system. You can either buy a pre-made panel or build your own.

Ground the System.

Be sure to ground your solar panel system according to the National Electrical Code. This will help to ensure the safety of you and your family.

Make the Electrical Connections Inside.

Make the electrical connections to your solar panel system inside. That way, you will be able to monitor the output of your system and make any changes that are needed.

Buying Options for Rooftop Solar

Cash Purchase

A cash purchase is the simplest way to buy solar panels for your roof. You can easily buy them in cash if you have enough money to afford them. Cash purchases are the best options when you need immediate solutions for your energy crisis. However, this option will not be beneficial when you want to save money on electricity bills in the long term.


Borrowing money from your bank to buy solar panels is a good option for those who need immediate solutions and can’t afford to spend that much money. By doing this, you will be able to save enough money that will cover the cost of repayment. If you repay your loans on time, it will not cause any extra burden to your finances. Loans can be a good option when you want to install more solar panels than you can afford to pay for in cash.


Leasing solar panels is a good option for those who want to start using solar energy but don’t want to spend too much money. Leasing companies usually install the solar panels for you and you will just need to pay a fixed monthly fee. This option is good for those who want to save money on their electricity bills in the long term.

Solar Power Purchase Agreement (PPA)

Using a PPA is a good option for those who don’t want to make any investment, but still want to start using a solar energy system by availing of a power purchase agreement. You can avail of this service if you have an existing electricity bill with your supplier.

Frequently asked questions about home solar roof system

What do residential solar panel cost?

When it pertains to solar energy, the cost of a 5kW system is about 2.77 per watt, resulting in solar panel cost ranging from $17,538 to $23,458. That is before any federal tax credit or incentives are factored in. If you know your present electricity usage levels, you can calculate how much you may end up saving over the lifetime of the solar power panels by going solar.

How are solar panels installed?

Generally, solar panels are installed on roofs. Solar installers will need to access your roof in order to install the residential solar panels. They will also need to ensure that your home is compatible with a solar power system and that it has enough sunlight exposure. Solar panels installed on a roof can help to reduce the cost of electricity by generating power from the sun.

Are solar panels bad for your roof?

As long as the installation is well done, solar panels are not bad for your roof. They can actually help to extend its life by protecting it from UV rays and other environmental factors that cause damage.

How big of a solar system do I need a calculator?

Many solar companies offer a solar calculator which can help homeowners to determine how much of a system they need. It’s important for you to get the right-sized system in order to get the most savings from your solar panels, ensure that it is sized properly and not oversized.

Why compare solar power costs?

When it comes to installing solar panels, there are many options that a homeowner can choose from. It’s important to compare solar power costs and find out which option is best for you.

Does installing solar panels void roof warranty?

No, it does not. If the solar panels are installed by a professional with prior experience in installing them, there will be no issues with your warranty being voided.

If you would like to know if we can install solar and put thousands of dollars in your pocket for doing it, use the form below to submit your electric bill for a no cost, no obligation evaluation.