Before Your Solar Install: A Minnesota Homeowner’s Checklist

Signing the contract is the exciting part. Waiting for installation is the part where most homeowners realize they didn’t think through a few details. The good news: most of what makes an installation go smoothly is straightforward preparation, and the list is shorter than you’d expect.

Here’s what to review and confirm before your crew shows up.

Roof and Exterior Prep

Confirm your roof is in good condition. Solar panels are designed to last 25+ years. If your roof is nearing end of life — say, 15 or more years old, or showing signs of wear like curling shingles, granule loss, or soft spots — it makes more sense to replace the roof before or alongside the solar installation than to remove and reinstall panels in a few years. Your installer should have reviewed roof condition during the site assessment; if there’s any uncertainty, get a roofing inspection.

Clear roof access. If your home has skylights, chimneys, or other penetrations near the planned panel area, confirm the layout with your installer. The exact placement of panels may shift slightly from the initial design based on what’s on the roof.

Trim overhanging branches. This isn’t just about installation day access — it’s about long-term production. Branches that shade even part of your panel array reduce output. If any branches overhang the planned installation area, trim them before install day. Your installer’s shade analysis was done with the current canopy in mind; if anything has changed since the site visit, mention it.

Identify and clear roof access points. Installers need to get on your roof safely. Make sure ladders can be placed securely and that nothing blocks the planned access path around your home. Move vehicles, yard equipment, or anything that limits staging around the perimeter of the house.

Electrical and Utility Preparation

Know where your main electrical panel is. Your installer will likely already know this from the site visit, but it’s useful for you to know too — on installation day, there may be a period where power is briefly interrupted as the system is connected. Knowing where your panel is helps you plan for that.

Check with your HOA if applicable. If your property has a homeowners association, confirm that solar is approved before installation day. Minnesota law limits HOAs’ ability to prohibit solar but doesn’t eliminate all restrictions — covenants around aesthetics, placement, and installation methods may still apply. Review the specifics early. Our solar and HOA explainer covers the legal landscape.

Notify your homeowner’s insurance. Insurance companies generally want to know when you’ve added a significant permanent feature to your home. Some policies update automatically; others require a call. It’s also worth confirming your coverage extends to the solar equipment — most homeowner policies cover rooftop solar as part of the home’s structure, but verify. For more detail on how solar interacts with home insurance, see our insurance explainer post.

Review your utility interconnection status. Before your system can go live, your utility needs to approve interconnection — the formal process of connecting your solar system to the grid. Your installer handles the paperwork, but the timeline varies. Xcel Energy interconnection approvals typically run a few weeks. The system can be physically installed before approval, but it cannot be turned on until interconnection is granted.

On Installation Day

Plan for a full day. A standard residential installation takes one full day for a typical 6-10 kW system. Larger systems or homes with more complex layouts may run into a second day. The crew will be on your roof and around your home for most of the day.

Make sure someone is home, or authorize access. Installation crews need to access your attic, electrical panel, and roof. Someone with authority to give access should be reachable on installation day — either present at the property or by phone.

Turn off or relocate pets. Installers will be moving through the home, attic, and garage. Keep pets secured in an area that won’t interfere with the work.

Protect your attic and interior access areas. Crews typically drop a ladder into your attic to run conduit and make interior electrical connections. You don’t need to clear the whole attic, but making sure there’s a clear path to the access hatch makes the work go faster.

Power may be briefly interrupted. When the system connects to your main panel, there will likely be a short period — typically 15-30 minutes — where power to part or all of the home is off. Plan accordingly for anything that needs continuous power.

After Installation — Before Turning the System On

Permit inspection. Minnesota requires a permit inspection of the installation before the system can be energized. Your installer handles the permit filing; the inspection is scheduled and conducted by your municipality. Once the inspection passes, your installer will know.

Utility interconnection approval. After the permit inspection, your utility must formally approve the grid connection. Your installer submits the interconnection application. Once approved, the system can be turned on.

Get your monitoring access set up. Modern solar systems include monitoring platforms — Enphase Enlighten, SolarEdge monitoring, or similar — that let you track production in real time. Ask your installer to walk you through the monitoring app before they leave. Knowing how to read your production data helps you catch any issues early.

Know who to call. Before the installation crew leaves, confirm the right contact for any post-installation questions, warranty claims, or system issues. At Centauri, that’s us — not a third-party service company.

For a detailed look at what happens during the installation process from site assessment through commissioning, see our installation process overview.

FAQ: Solar Installation Preparation in Minnesota

Do I need to be home on installation day?
Someone with access authority should be reachable on installation day — either at home or by phone. Installers need access to your attic, electrical panel, and roof.

How long does a solar installation take in Minnesota?
Most standard residential systems are installed in one day. Larger or more complex installations may run into a second day.

Will my power be off during installation?
There’s typically a brief interruption — 15-30 minutes — when the system connects to your main panel. Your installer will communicate the timing.

When can I actually turn the system on?
After the permit inspection passes and your utility grants interconnection approval. This can take a few weeks after physical installation.

What if my roof needs to be replaced?
It’s generally better to replace the roof before solar installation. Panels can be removed and reinstalled, but it’s an added cost. If your roof has fewer than 10-15 years of remaining life, address it first.

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