What Happens on Solar Installation Day in Minnesota

You signed the agreement. Permits came through. The installation date is on the calendar.

Now what?

Installation day is often the part of the solar process people know the least about. The weeks of paperwork and approvals disappear, and suddenly a crew of electricians and installers shows up at your home with a truck full of equipment. Here’s an honest look at what that day actually involves, from setup through final walkthrough.

Before Installation Day: What You Should Do

A few things make installation day run more smoothly on your end.

Clear the area around your electrical panel. The installation crew will need access to your main electrical panel throughout the day. Move anything stored in front of it, the cleaner the access, the less disruption inside the home.

Plan for crew access to your roof. They’ll need a spot to work from outside your home, usually on the driveway or near the garage. If you have gates or locked side yards, make sure those are accessible.

Keep pets inside. Crews moving between the roof and ground, along with equipment, can be unsettling for dogs. Keeping pets secured makes everyone’s day easier.

Know that the power will go off briefly. At some point during the electrical work, your crew will need to cut power to safely work at the main panel. This is typically a short window, 30 to 60 minutes, but plan for it if you’re working from home.

You don’t need to be home the whole time. Many homeowners go to work on installation day. The crew doesn’t need you present continuously. An initial meet-and-greet in the morning and a walkthrough at the end is standard.

The Installation Sequence

A typical residential installation runs 6 to 8 hours. For larger systems or more complex roofs, it can stretch to two days. Here’s the general flow.

Morning: Arrival and Assessment

The crew arrives, typically between 7 and 8 AM. First step is walking the site, confirming panel placement, checking roof access, reviewing the permit documents, and making sure everything matches the system design.

This is when the crew lead will introduce themselves, ask about any roof quirks or access constraints, and confirm where you want them to set up their work area on the ground.

Mid-Morning: Racking Installation

Before a single solar panel goes up, the racking system goes on the roof. This is the aluminum framing structure that panels attach to.

The crew marks the rafter locations under your roof sheathing (they need to hit solid wood, not just decking), drills lag bolts through the sheathing and into the rafters, and attaches the rail system those bolts support. Each penetration point is sealed with flashing and sealant to prevent water intrusion.

This phase is the most roof-intensive part of the day. You’ll hear drilling. The roof will look partially populated with metal rails before any panels appear.

Late Morning to Early Afternoon: Panel Installation

Once the racking is in place, panels come up. A two-person crew manages this efficiently, one on the roof, one on the ground or ladder passing panels up.

Each panel clips or bolts into the railing system. Ground cables run between panels (series or parallel depending on your inverter type). The crew bonds the panels to the racking system for grounding.

This phase looks fast because it is. Racking takes longer than panels.

Afternoon: Electrical Work

This is the phase that involves your electrical panel. The crew will:

• Run conduit from the roof down to where the inverter will be mounted (typically on an exterior wall near the electrical panel, or in the garage)
• Install the inverter and any monitoring equipment
• Run wiring from the inverter to your main electrical panel
• Install a dedicated solar circuit breaker in the panel
• Shut off power briefly to make the final connection

If you have a battery system being installed alongside panels, this phase takes longer and involves additional wiring and equipment.

The inverter converts the DC electricity your panels generate into AC electricity your home uses. It also connects to your monitoring system, which lets you track daily and historical production on your phone or computer.

Late Afternoon: Final Checks and Walkthrough

Before the crew leaves, they run system checks. They verify connections, test the system (if interconnection has already been approved), and confirm everything is to spec.

They’ll do a walkthrough with you that covers:

• Where the inverter is and what the indicator lights mean
• How to access your monitoring app or platform
• What the permit tag means and where it stays (typically attached to the panel for city inspection)
• What to expect next: city inspection, then Xcel interconnection approval

At this point the system is physically installed. It’s not producing power for your home yet, it won’t go live until Xcel approves the interconnection and gives the green light to turn it on.

After Installation Day: The Wait

Most homeowners are surprised that after all the installation activity, the system sits idle for a few more weeks.

Here’s what’s happening:

City inspection. The city scheduled an inspection when the permit was pulled. The inspector verifies the installation matches the permit drawings and that the electrical work is up to code. In the Twin Cities area, this typically happens within 1 to 2 weeks of installation.

Xcel interconnection approval. After the city inspection passes, Xcel performs their own review and approval before they authorize your system to go live. This is the step that most commonly takes longer than expected. Xcel’s queue runs anywhere from 2 to 6 weeks depending on the current volume of applications.

System activation. Once Xcel approves, they’ll either send a letter or update your account online. You (or we) then flip the switch on the inverter to activate the system. From that point, you’re generating solar power.

The period between installation and activation is a known frustration for solar customers. We set accurate expectations about this timeline during the proposal process so it’s not a surprise.

Frequently Asked Questions. Solar Installation Day in Minnesota

Do I need to be home the entire day of installation?
Not necessarily. Many homeowners go to work on installation day. A brief check-in at the start and being available for the walkthrough at the end is the most important thing. Let your installation coordinator know if you’ll be away for portions of the day.

How loud is solar installation?
Drilling for racking is the loudest part. It’s similar in volume to other roof work, noticeable inside but not disruptive to most people working from home. The afternoon electrical work is quieter.

What if it rains on installation day?
Light rain doesn’t necessarily stop installation. Active thunderstorms will pause roof work. If weather is severe, installation is rescheduled. We monitor forecasts for scheduled installation dates.

Can I use my electricity during installation?
Yes, for most of the day. There will be a brief planned outage (typically 30 to 60 minutes) when the electrical panel work happens. Your installation coordinator will give you a heads-up.

How long until my system is producing power after installation?
From installation day to system activation, expect 2 to 8 weeks depending on city inspection scheduling and Xcel’s interconnection queue. The physical installation is complete on day one, the wait is regulatory, not technical.

We Walk You Through Every Step

Installation day doesn’t have to be mysterious. We communicate what’s happening, when it’s happening, and what comes after.

If you’re still in the research phase, a free site assessment is the place to start. We’ll walk you through the full timeline, not just the install day, so you know exactly what you’re signing up for.