How to Prepare for Solar Panel Installation

By Geoffrey Sperring

May 03, 2022

Updated August 14, 2026

Are you tired of rising electricity prices? These prices continue to increase at above-inflation rates. In 2026 alone, the average price of electricity rose by 5% over 2025. Some states, especially those in the northeast, have seen increases of more than 14%. Maybe it's time to consider a solar panel electrical upgrade to reduce your electricity costs.

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Perform a Pre-Solar Home Energy Audit

Before proceeding, evaluate your home's potential for solar electricity generation. Points to consider include:

Cost of electricity: The higher the cost of electrical kilowatt-hours (kWh), the greater the potential for economic solar energy generation.
Roof orientation: Solar panels need to face the sun, so you'll need a south-facing roof, although a southeast- or southwest-facing roof will also work.
The roof pitch: The pitch ideally needs to be between 15 and 40 degrees.
Solar obstructions: Features such as chimneys, trees, hills or tall buildings that shade the roof significantly reduce solar generation potential.

What to Know Before Installing Solar Panels: 7 Things to Do

The Installation of solar panels entails preparation beyond the actual work. Here's a solar panel installation checklist that covers the major steps in the process:

Get a quote. Obtain one or more quotes for a solar system from reputable installers in your area.
Determine local incentives. Check to see whether your state offers tax credits for solar, and if there are rebates from your utility, local authority or state.
Do a solar installer walkthrough. Before accepting a quotation, arrange for the vendor to assess your home and discuss inverter placement and the associated batteries if you're including energy storage as part of the system.
Get a solar roof inspection. Arrange for a roof inspection to ensure the structure can support the panels and that the pitch and orientation are suitable for solar panels.
Understand the permit process. You need to obtain electrical and building permits from the local authority. Your local authority may also require a zoning permit, particularly when you live in an area of historical significance.
Get HOA approval. If you live in a townhouse, condominium development or gated community, you will need approval from the homeowners' association.
Contact your utility company. Speak to your utility about a solar utility grid connection and, if you intend to export excess power, about a net metering setup that allows you to obtain credits for excess electricity generated by the solar panels.

Do I Need a New Roof Before Getting Solar Panels Installed?

Monocrystalline solar panels have a usable life of more than 25 years. This period is as long as some types of roofing materials. The roof must be in good condition before installing solar panels, as roof repair or replacement later is difficult. Points to consider are the age of the roof, its structural integrity and preparing the roof for a solar installation.

Age of the Roof

Some roofing materials, such as wood and asphalt shingles, have a lifespan of between 15 and 30 years. This is comparable to the lifespan of solar panels. If the roof is more than 10 years old, consider replacing the roof shingles at the same time as installing solar panels. Apart from matching lifespans, this allows the contractor to carry out structural repairs and install the solar panel supports without damaging or disturbing worn roofing materials.

Structural Integrity of the Roof

Check the roof's load-bearing capacity before installing the solar panels. This is especially critical when the roof is made from lightweight roof materials like metal and shingles. Each solar panel weighs around 70 pounds, so the additional roof load is significant. Ask a roofing or structural engineer to evaluate the strength and integrity of the roof and its support structure before installing solar panels.

Preparing the Roof for Solar

Should you decide not to replace roofing materials, get the roof checked for damage, leaks and weak spots before installing solar panels. Repairing damage later may require removing some or all solar panels. Remove surplus fittings like antennas and satellite dishes, or reposition them so they don't shade the roof panels. It's best to have the roof professionally cleaned before the solar installer starts work.

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How Long Does the Solar Panel Installation Process Actually Take?

The total time required for solar panel installation is around 12 weeks. This excludes reroofing and structural repairs to the roof, which may take 2 to 3 weeks. This list shows how long each activity should take:

Obtaining quotes: It takes installers between 1 and 2 weeks to assess your home and prepare a quote for the installation of solar panels.
Site visit: Once you've signed a contract, an engineer will check your electrical panel, take detailed roof measurements and confirm everything is compatible for the solar installation. This may take 2 weeks, bringing the timeline to 3 to 4 weeks.
Permits and applications: Permitting times vary, and they require a lot of paperwork. On average, allow 3 weeks for the permitting process, bringing the total elapsed time at this point to 7 weeks.
Equipment ordering: The installer orders the photovoltaic (PV) cells, mounting racks, inverter and battery racking system while waiting for the permit. Equipment delivery takes around 3 weeks.
Installation: Allow a week for solar panel preparation, inverter installation and roof weatherproofing, bringing the total time up to 8 weeks.
Final permitting inspections: After installation, local building and electrical inspectors will inspect the installation to confirm it meets local electrical codes and building standards. Allow 2 weeks for this work.
Utility connection: The final step is for the utility company to check the installation conforms to their standards and to witness a functionality test. Once they're satisfied, your installer can close the circuit breaker and bring the solar system online. This last step normally takes a week, bringing the
total elapsed time up to 12 weeks.

What Should I Clear Out of My Yard or Attic Before Installers Arrive?

Before the big day arrives, clearing the way for the installer makes the installer's job easier and may save additional expense.

Clean and repair the roof. Have the roof and flashing checked and repaired before installation starts. Use a professional contractor to remove dirt, moss and algae from the roof, preferably using a soft-washing method that doesn't damage shingles and tiles or cause leaks.
Trim trees. Working with an arborist, identify trees and branches that shade the solar panels and have them trimmed or removed. Take future growth into account so you don't need to repeat tree trimming every year.
Clear the yard and driveway. The installer needs good access to the roof and space to assemble equipment, so use this as an opportunity to clear out your yard and driveway to provide a clear working area.
Clean the attic. The installer needs access to the attic to secure panel fasteners, install equipment and affix conduit piping for cables from the solar system to the inverter. Clean the attic and, in conjunction with the installer, clear a suitable pathway for the work.
Create a safety zone. During installation, create a safety zone around the home so that children and pets aren't at risk of being struck by items accidentally dropped by the installation crew.

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