How to Pick a Solar Installer
You Can Actually Trust
The solar industry has excellent installers — and a few bad ones. Here’s exactly what to look for, what questions to ask, and what red flags to walk away from before you sign anything.
- Always get at least three quotes — and compare them on more than just price
- NABCEP certification is the gold standard for solar installers — look for it on the crew, not just the company
- In PA, installers should be registered with the PA Attorney General and hold EAA-Certified PV credentials
- Local installers generally outperform national companies for service, permitting knowledge, and long-term support
- Never sign a contract on the same day you receive a quote — a good installer will never pressure you to
Why your installer choice matters more than your panel brand
Most homeowners spend hours researching solar panel brands and not nearly enough time evaluating the company that will actually be on their roof. That’s understandable — panels get marketed heavily and installers rarely do. But here’s the reality: a great panel installed poorly will underperform, and a workmanship problem discovered five years later can be expensive and painful to fix.
The solar industry has matured significantly, but it still attracts a share of high-pressure sales organizations, brokers who subcontract every part of the work, and companies that won’t be around in three years when you need service. Knowing how to tell the difference before you sign anything is one of the most valuable things you can do as a solar buyer. Before going further, you may also want to confirm your home is a good fit for solar and get a sense of how many panels you’d need.
In 2026, thousands of homeowners across Pennsylvania have systems installed by companies that no longer exist. When something goes wrong — an inverter fails, a panel cracks, the monitoring app stops working — they have no one to call. These homeowners are called “solar orphans,” and their numbers are growing. Choosing an established local company dramatically reduces this risk.
What a trustworthy solar installer looks like in Pennsylvania
Good installers and bad installers often say similar things during a sales call. The difference shows up in the details — credentials you can verify, answers that are specific rather than vague, and a willingness to slow down and let you make an informed decision. Here’s what to look for and what to avoid.
Signs you’re working with a quality installer
Look for as many of these as possible
NABCEP-certified crew on site
The North American Board of Certified Energy Practitioners sets the gold standard for solar installation credentials. Ask specifically if a NABCEP-certified professional will be on site during your installation — not just employed by the company somewhere.
Licensed, bonded, and insured — verifiably
Ask for their license numbers and verify them with your state’s licensing board. In Pennsylvania, installers should be registered with the PA Attorney General and hold EAA-Certified PV credentials or work under a licensed electrician with that certification. Don’t accept “we’re licensed” without specifics.
3+ years in business with local references
Companies less than 2–3 years old carry more risk — not because they’re necessarily bad, but because solar problems often show up years later and you need the company to still exist. Ask for references from customers in your county who had their system installed at least two years ago.
In-house installation crew or transparent subcontracting
Some subcontracting is normal and fine — many companies use licensed roofers for racking and master electricians for final connections. What’s not fine is a company that can’t tell you clearly who will be on your roof and why. The best installers use their own trained crew and say so proudly.
Minimum 10-year workmanship warranty
Panel and inverter manufacturers cover their equipment — but labor is separate. If something goes wrong with the installation itself (a roof penetration that leaks, a loose connection), you need a workmanship warranty to cover it. Ask for at least 10 years in writing. For more on how financing affects warranty ownership, see our Buy vs. Lease vs. PPA guide.
On-site roof assessment before quoting
A reputable installer will visit your property — or at minimum conduct a detailed virtual assessment using high-resolution imagery and your actual utility bills — before giving a final quote. Companies that quote a system size from a quick phone call without seeing your roof are cutting corners.
Strong, recent Google and SolarReviews ratings
Look for a consistent pattern of positive reviews — especially ones that mention the service experience after installation, not just the sales process. Filter by “most recent” to see how the company is performing now, not just how they did three years ago.
Red flags — walk away if you see these
Any one of these is a reason to pause. Multiple red flags together is a reason to leave.
“Sign today” discounts or time-pressure tactics
A quality installer will never pressure you to sign on the day of the sales visit. Urgency tactics — “this price is only good today,” “we have a special government program that expires Friday” — are manipulation, not business. Good solar companies don’t need to do this.
Claims about “free solar” or “government programs”
Social media ads claiming you can get solar “for free” through a government program are almost always misleading. The federal tax credit reduces your cost — it’s not a giveaway, and it doesn’t eliminate the cost entirely. Anyone claiming otherwise is being deceptive about the terms.
Evasiveness about who installs the system
If the person selling you solar can’t clearly explain who will actually be on your roof and what their qualifications are, that’s a problem. Some companies are pure sales organizations that broker projects to the lowest-cost subcontractor available. You deserve to know who is doing the work.
A quote that’s dramatically lower than everyone else’s
Solar pricing has become more transparent in 2026. A quote that comes in 25–30% below every other installer isn’t a deal — it usually means cheaper equipment, inexperienced crews, or hidden costs that appear later. Be especially cautious if they can’t explain the price difference clearly.
No physical address or recent name change
Solar companies that can’t provide a verifiable local address or that have recently rebranded (sometimes to escape negative reviews) are higher risk. Always Google the company name plus “complaint” or “BBB” before proceeding. Check with your state’s Attorney General office if anything seems off.
System sized based on a satellite image alone
Properly sizing a solar system requires understanding your roof structure, shading throughout the day, local utility rules, and 12 months of your actual energy usage. Companies that size a system using only a satellite photo and a rough estimate of your bill are skipping steps that matter.
12 questions to ask every installer you meet
These questions aren’t designed to trip anyone up — they’re designed to help you identify whether you’re talking to a knowledgeable professional who will stand behind their work, or a salesperson who will hand the project off to someone you’ve never met. Good installers welcome every one of these questions.
NABCEP certification requires passing a rigorous exam and demonstrating real installation experience. It’s the industry benchmark.
In Pennsylvania, ask for their registration with the PA Attorney General and their EAA-Certified PV credential. Any hesitation is a red flag.
Subcontracting isn’t automatically bad — but you deserve to know. What matters is accountability: who trains the crew, who supervises the work, and who you call if something goes wrong with the installation itself.
A professional installer should be able to tell you the specific panel make and model, inverter type, and racking system — and explain why those choices fit your roof, shading situation, and goals. If they can’t justify the equipment selection, they may not be the ones designing the system.
Equipment warranties (25 years for panels, 10–15 years for inverters) cover the products themselves. The workmanship warranty covers the labor — roof penetrations, wiring, mounting. This is often the most expensive issue if something goes wrong.
A site inspection lets the installer evaluate roof condition, structural load capacity, attic ventilation, and potential shading that satellite images miss. Skipping this step leads to surprises on installation day — sometimes expensive ones.
System size should be based on your actual 12 months of energy usage, your roof’s specific production potential, and your goals (100% offset vs. partial offset). A system sized on a rough estimate of your bill will almost always be wrong. Use our solar panel calculator to get a baseline before your installer meetings.
Full-service installers handle the entire process: permits, utility application for net metering, inspection scheduling, and Permission to Operate (PTO). You shouldn’t have to chase the utility or municipal inspector yourself.
Every modern solar system should include a monitoring app that lets you see daily production. More importantly: does the installer proactively monitor your system, or do they expect you to notice a problem yourself?
Recent references reveal how the company performs during and right after installation. Two-year-old references tell you how they handle service calls, warranty issues, and monitoring problems — the things that matter for the long haul.
Every utility has different interconnection requirements, inspection processes, and net metering paperwork. Installers who’ve done dozens of projects with your specific utility are far less likely to have permitting surprises or delays. Learn more about how PA net metering works by utility →
This is the question that reveals how seriously a company has thought about its long-term obligations to customers. An honest company will have a real answer — not just “that won’t happen.”
How to compare solar quotes side by side
Getting multiple quotes is one of the most important steps in the solar buying process — the Pennsylvania PUC recommends getting at least three. But comparing quotes is only useful if you’re comparing the right things. Price alone is a poor guide; a $2,000 difference in price can easily be explained by a $2,000 difference in panel quality.
When you lay three quotes next to each other, here’s what to check:
| What to compare | Green flag | Yellow flag | Red flag |
|---|---|---|---|
| System size (kW) | Based on 12-mo usage | Rough estimate used | No explanation given |
| Panel brand & model | Named with specs | “Tier 1” without model | Not mentioned at all |
| Inverter type | Specific model + reason | Brand named, no reason | Not specified |
| Estimated annual production (kWh) | Modeled for your roof | Regional average used | Not included in quote |
| Workmanship warranty | 10+ years in writing | 5 years | 1–2 years or missing |
| Permit & interconnection included? | Yes, full service | Partially included | Extra charge or unclear |
| Monitoring app included? | Yes, with proactive alerts | App only, no monitoring | Not mentioned |
Some solar loan products charge the installer a fee of 20–30% of the loan amount, which installers often roll into the quoted system price. This can inflate your financed cost by thousands of dollars compared to paying cash for identical equipment. Always ask for the cash price and the financed price separately, and compare the difference to the interest on a standard bank loan. If the gap is large, the loan has a high hidden fee built in. Our Buy vs. Lease vs. PPA guide covers all four financing options in detail.
What to expect from first contact to first kilowatt
Understanding the installation timeline helps you set realistic expectations and spot delays that shouldn’t be happening. Here’s the typical process for a Pennsylvania residential installation from start to finish.
Site assessment and final quote
A qualified installer visits your property (or conducts a detailed remote assessment), reviews 12 months of bills, evaluates your roof and electrical panel, and provides a final quote with specific equipment and production estimates. Don’t rush this step — it’s the foundation everything else builds on.
Contract signing and permit application
Once you’ve compared quotes, chosen your installer, and reviewed the contract carefully, you sign. Your installer submits the permit application to your municipality and the interconnection application to your utility. This stage is mostly paperwork — you shouldn’t need to do anything.
Permit approval and utility review
Municipal permit approval typically takes 1–4 weeks depending on your jurisdiction. Simultaneously, your utility reviews the interconnection application — PECO runs 3–5 weeks, PPL and Duquesne Light typically 2–4 weeks. Your installer should keep you updated throughout.
Installation day
A typical residential installation takes one to two days. The crew mounts racking on your roof, installs panels, runs wiring to the inverter, and connects everything to your electrical panel. You’ll be home for at least part of this — the installer should walk you through the system when done.
Inspection and Permission to Operate
Your municipality inspects the installation. Once approved, your utility grants Permission to Operate (PTO) — the moment your system legally switches on and starts generating electricity and earning net metering credits. The total timeline from contract signing to PTO is typically 8–14 weeks in PA.
Common solar scams targeting Pennsylvania homeowners
The solar industry has attracted bad actors who target homeowners with misleading claims — particularly through door-to-door sales and social media advertising. These tactics have become more common as solar has grown in public awareness. Here are the patterns to watch for specifically in Pennsylvania.
“Free solar through a government program”
There is no free solar program. The 30% federal tax credit reduces your cost — it doesn’t eliminate it. Anyone claiming otherwise is misrepresenting the terms of a lease or PPA, where you won’t own the system.
Aggressive door-to-door canvassers
Legitimate solar companies do use door-to-door sales, but aggressive tactics — refusing to leave without a signature, claiming the offer expires today — are warning signs. You can always ask them to leave and look them up independently.
“Special low-income solar assistance” ads
Social media ads targeting low- and middle-income homeowners with claims of “no-cost solar assistance programs” are almost always for high-pressure leases with unfavorable terms. These are not government programs.
Inflated savings projections
Some installers use unrealistically high electricity rate increase assumptions (6–8% per year) to inflate their 25-year savings projections. Ask what rate increase assumption they’re using and compare it to your utility’s actual history.
If you’ve had a bad experience with a solar installer or believe you were misled, the Pennsylvania Attorney General’s Bureau of Consumer Protection handles solar-related complaints. You can file a complaint at attorneygeneral.gov. The PA PUC also recommends verifying solar companies through the Attorney General’s registration database before signing anything.
Related guides for Pennsylvania homeowners
Everything you need to go from curious to confident.
Skip the research and talk to someone you can trust.
Colin Dunham is an independent solar consultant serving Pennsylvania homeowners. He’ll give you an honest assessment of your home, explain exactly what a system would cost and save, and never pressure you into a decision you’re not ready to make.