solar installation steps

Solar Panel Installation Guide: the 5 Step Process

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More than a million homes have already gone solar in the U.S., and many more homeowners are considering installing solar. If you’re in the market for solar, you probably want to know what actually happens during a solar panel installation. There are five big steps that need to happen after you sign your solar contract before the solar panels on your roof can actually power your home, and a lot of it is behind the scenes. To show you what you can expect, we’ve outlined a simple five-step guide for the typical solar installation process.

It’s always good to start with a broad overview. Start out by watching EnergySage’s time-lapse video, Solar Installation in Less Than a Minute, which shows one of EnergySage’s pre-screened solar installers assemble a 6.7 kW solar energy system on a home in Newton, Massachusetts. The happy homeowners now save $2,250 on their electricity bills every year thanks to their new solar panels, and will break even on their investment in just five years.



How to install solar panels step by step: what is involved in the solar panel installation process?

Installing solar panels doesn’t happen overnight – there’s a process for what needs to happen to get your panels ready to begin powering your home. Overall, from the day you sign your contract with your installer, it will typically take between one and three months before your solar panels are grid-connected and producing energy for your home. We’ve outlined the five-step solar panel installation guide below:

1. Engineering site visit: the first step to getting your solar system installed

After you sign your solar contract (whether it be a lease, loan, cash purchase or power purchase agreement), an engineer will come by your property to evaluate the electrical status of your home and ensure everything is compatible with your new energy system. This engineer will typically work directly for your installer, but could also be an independent provider contracted by your installer. You can expect the engineering site visit to occur soon after signing with your installer.

During the visit, the engineer will evaluate the condition of your roof to ensure that it’s structurally sound. He or she will also look at your electrical panel – the grey box in your basement – to see if you’ll need to upgrade it. If you hear from an installer that they need to upgrade the electrical panel, that means that your new solar panels will require more amps of current and the ampere capacity of your electrical box will need to increase.

It should be noted that this engineer visit is different than a general site visit which is when an installer evaluates your property to consider system size, roof type, angle of roof, shading, etc. before any contract is signed. Additionally, though an engineer will typically come by, in some cases the installer can take photos of the property and conduct their own measurements of the roof and the engineer will be okay with signing off without doing his or her own visit.

2. Permits and documents: the logistical paperwork required for your solar panel installation

As with any big financial decision, installing solar panels involves a lot of paperwork. Luckily, most of this paperwork is dealt with by the installer – regardless, it’s always a good idea to know what’s going on behind the scenes of your solar installation. One of the main things you’ll be applying for will be state and federal solar incentives such as the federal ITC, local solar programs, clean energy financing initiatives like PACE, government rebates and solar renewable energy certificates (SRECs).

In addition to applying for incentives, you will need to fill out other paperwork like building permits. These permits are specific to where you live. For example, certain states require that a roof has three feet of clear space surrounding the solar panels, whereas other areas of the U.S. will allow you to install panels across the entire surface of your roof. Your installer will know the restrictions and requirements of the states in which they operate, and can help you figure out which permits you need – in many cases, the installer will fill out this paperwork for you.

The time frame for this step is mainly dependent on how long it takes your installer to get it all finished and submitted. If you’re eager to get your panel system up and running immediately, just make sure to follow up with your installer to check on the progress of your paperwork.


3. Ordering equipment: choosing the panels and inverters and getting your solar panel installation scheduled

solar installer talking-to homeownerNow that you’re set up with the proper paperwork, your installer will be ready to place an equipment order through their primary distributor. At this point, you will have already decided on the equipment your system will include – that decision occurs before the contract sign.

However, if you’re looking for advice on equipment selection, here are some things to consider. The two primary components you’ll need to evaluate for your system are solar panels and inverters. Your installer will likely recommend a particular brand for each, and will additionally offer a few alternatives. Durability, efficiency and aesthetics are the primary factors most homeowners will use to compare the various brands (other than price).

To be certain that you’ve chosen the right equipment for your system, spend some time researching microinverters vs. string inverters vs. power optimizers and look into the best-rated solar panels on the market. Evaluating your equipment options can help you feel prepared for the ordering and shipment stage of the solar panel installation process.

Once the equipment ordering process is complete, your property is added to your installer’s queue.Your equipment (panels and inverters) will likely arrive on the day of your installation, which can happen whenever your paperwork is approved (typically within one to two months). Time until install also depends on how many projects your installer has in their queue. If possible, try to get your solar installation done in the winter when solar companies aren’t as busy.

4. Solar panel installation: the big day

The actual installation is an exciting day for every solar homeowner. Your solar installer will start by prepping your roof and making sure the shingles or tiles are properly attached. Then, they put in electrical wiring that will connect to your electrical panel and general power system.

After the electrical wiring is complete, they will install racking to support your panels (this is the only piece of equipment that will actually be attached to your roof). Once the racking is level and safely attached, the panels are placed onto the racking. Finally, your inverter(s) are connected to the panels to convert direct current (DC) energy into the alternating current (AC) energy used in homes and on the electric grid.

The timeline for the installation will range from one to three days, completely dependent on the size of the system you are installing. One additional factor that can add time to your installation process is putting in a power meter for net metering. If your installer needs to add a power meter, this will add a few hours to your solar panel installation.

5. Approval and interconnection

The final step of going solar is “flipping the switch,” so to speak, and officially commencing to generate power from your rooftop. Before you can connect your solar panels to the electric grid, a representative from your town government will need to inspect the system and give approval. During this inspection, the representative will essentially be double-checking your installer’s work. He or she will verify that the electrical wiring was done correctly, the mounting was safely and sturdily attached, and the overall install meets standard electrical and roof setback codes.

Following this local inspection, you will be ready for official grid interconnection. A representative from your electric company will come by to do their own final evaluation of the solar panel system. As long as there are no glaring issues, your panels will go live the moment they “give the okay” and connect your system to the grid. You can expect to wait two weeks to a month for the town approval and utility approval to occur and interconnection to go live.

Why go through the one to three-month process of installing solar on your home? In 2015, the average solar shopper on EnergySage offset 85.9% of their electricity usage by going solar, and will pay off their solar energy system in just 7.5 years. Find out just how much you can save by using our Solar Calculator to get a personalized instant estimate based on offers in your area. If you’re ready to start comparing quotes from pre-screened installers in your area, you can register your property on the EnergySage Solar Marketplace.


13 thoughts on “Solar Panel Installation Guide: the 5 Step Process

  1. Jennifer Lopez

    You will not be able to build a solar panel big enough to fit a house hold usage not to mention all the wiring to the main fusebox then the separate fusebox for the solar panels oh and then you will need to feed whatever power you don’t use back to the power company so really unless Ur a super guineas id leave it and try and see if you can get solar power panels installed by your energy company for a cheaper cost like they do were i live.

  2. Jeanne

    We put solar on our home in upstate New York through a Solarize campaign that handled the installer selection . The system is amazing–it is simple to understand and works perfectly, and our bills are about a third of what they were. The costs of the system were cut by about 80% thanks to various tax credits and incentives. The installer took care of all the permits and design, was incredibly clear and responsive, and even reminded us at the turn of the year to be sure to use the solar tax credits when we filed with the IRS. It was the best investment we ever made in our home.

  3. Jeff Chenault

    It’s very important to maintain and protect your solar panels once installed. Lack of maintenance can result in costly repairs and inefficient operation.

  4. Allan Craig

    We have a 6,000 Sq Ft 2 story really old all electric home with basement heated by two five ton heat pumps, over 100 light fixtures and 87 large windows. It took 5 years to get all the windows changed to energy efficient double and triple glazed. another two years to insulate the roofs and just three months from start to finish installing and activating a solar electric system. Changing the windows and lights took our MONTHLY electric bills (annually averaged) from $700 to $500, Adding insulating dropped it down to $400 and finally the Solar Electric dropped the bills to $160. Better yet, we receive an annual rebate on average of $3,000 for putting energy back into the grid. What with the IRS tax deduction, the lower electric bills, and the annual electric generation check, our PV Solar system is on track to completely pay for itself by mid summer this year after only FOUR YEARS of operation. After that, we get to bank the annual production check and continue our electrical cost savings. The PV system is the best return on investment I have found.

  5. Carol Segura

    Purchased Solar panels with capacity to generate enough energy to compensate for $140.00 electric bill.
    Monthly electric bills were less than a $1.00 for 12 months, Jan of the next year received an electric bill for $1372.00 from electric company. Electric company states our usage was more than panels were producing.
    We were told a storage battery was not need because we were in a populated area. I read that if more energy is needed all we have to do is draw from the grid. However, the electric company will not let us draw from the grid only contribute. Take care and find out the electric company policy before you buy solar panels. The solar panel company will not answer our phone calls, electric company checked their equipment and did not offer any advice. Now we have to find our own solution.

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