Going solar typically takes 2–4 months from initial consultation to flipping the switch on your new system. Understanding each phase helps you prepare, budget accurately, and know what to expect along the way.
Initial Consultation & Site Assessment
Your solar journey starts with a free on-site evaluation from a qualified installer. They'll review your roof condition, orientation, shade patterns, and electrical panel setup to determine system size and placement. This visit usually takes 30–60 minutes and produces a detailed proposal showing estimated costs, energy production, and payback timelines.
Expect to provide utility bills from the past 12 months so installers can calculate your typical consumption and size the system accordingly. A 6kW residential system—common for medium-sized homes—typically costs $12,000–$18,000 before incentives (around $2–$3 per watt).
Permits & Paperwork (2–3 Weeks)
Once you've signed a contract, your installer handles most permitting. They'll submit applications to your local building department and utility company, which involves electrical diagrams, structural calculations, and fire safety documentation. This step protects you: permits ensure work meets code and your system is safe and eligible for incentives.
Processing times vary widely by jurisdiction—urban areas often move faster than rural ones. Some installers charge $300–$500 for permit fees; others bundle this into the overall cost.
Financing & Incentives (Concurrent)
While permits process, finalize your payment method:
- Cash purchase: No interest, maximum 30% federal tax credit (ITC) recovery
- Loan: Spreads payments over 5–7 years; you own the system immediately and claim tax credits
- Lease or PPA: Monthly payment fixed for 20–25 years; installer retains incentives (lower upfront cost, no tax benefits for you)
- PACE or rebates: Check your state and local programs—some offer 0% financing or instant rebates that reduce net cost by 10–20%
A customer with $16,000 system cost might claim a $4,800 federal tax credit (30%) if they own it outright, bringing net cost to $11,200.
Equipment Procurement (1–2 Weeks)
Once permits clear, your installer orders panels, inverters, racking hardware, and electrical components. Larger installers with inventory can expedite; smaller companies may wait for shipment. This is one reason multi-month timelines exist—supply chain delays occasionally push installation back.
Roof Preparation & Structural Work (1–2 Days)
If your roof needs repairs before panels mount, the installer addresses this first. Underlayment, flashing, and roof reinforcement happen now. Quality installers won't place panels on compromised roofing; poor roof work voids warranties and invites leaks.
Panel & Equipment Installation (2–3 Days)
The physical install is quicker than most expect. A typical residential system goes up in one or two days:
- Crews mount racking to roof rafters
- Install panels in rows, typically tilted 20–35°
- Run electrical conduit through your attic
- Connect combiner boxes and disconnect switches
- Mount the inverter in a garage, basement, or exterior wall
You'll hear drilling and tools, but there's minimal noise after day two.
Electrical Work & Integration (1 Day)
An electrician connects the inverter to your main electrical panel, installs a production meter, and ensures all breakers and safety devices function properly. They'll verify that your system safely integrates with your home's existing wiring and the grid.
Final Inspection & Interconnection (1–2 Weeks)
Your local building inspector tours the installation, verifies permits, and signs off. Simultaneously, your utility company schedules a meter replacement—a smart meter that tracks both consumption and solar production. This dual-meter setup allows your utility to credit you for excess energy you generate.
Only after both inspections pass can you go live. Activation typically happens within 2–4 weeks of final inspection.
Monitoring & Handoff
Your installer provides login credentials for a monitoring app where you track daily production in real time. Most systems produce 70–85% of nameplate capacity annually, depending on location and shading.
Finding a reliable installer matters enormously for quality outcomes and timeline adherence. Platforms like Mercoly help you compare and find trusted solar installation providers in one place, so you can review credentials, read customer feedback, and request quotes without endless research.
Frequently Asked Questions
Q: Can I install solar panels myself? No—most jurisdictions require licensed electricians for utility-tied systems, and manufacturer warranties void if non-professionals install them. DIY is legally and financially risky.
Q: How does weather affect installation timing? Rain or high winds stop work for safety; most installers schedule around forecasts, though winter or stormy regions may face longer project windows.
Q: What happens if my roof needs replacement soon? Install a new roof first—it's far cheaper and easier to do this before panels mount, and your solar warranty will cover the full system lifespan.
Ready to move forward? Request quotes from verified installers today and compare timelines specific to your location.