What Solar Salespeople Won't Tell You: 7 Facts Before You Sign

TL;DR: Most solar leases run 20-25 years, longer than the 15-20 year lifespan of an asphalt roof, which means you'll likely pay $1,500-$3,000 out of pocket to remove and reinstall panels for a roof replacement mid-contract. Panels also degrade about 0.5% per year, so by year 25 you're producing roughly 12% less power than day one, a detail rarely mentioned in the sales pitch.

_Last reviewed: July 2026 · 8 min read_

The pitch sounds simple: no money down, lower bills, help the planet. What doesn't get mentioned is what happens when your roof needs repair under those panels, or what your actual savings look like after year 10. Here's what the sales presentation usually skips.

Okoniq Property Hub keeps a permanent record of your roof condition, installation dates, and warranty documents in one place, so you have proof when a solar contract dispute or roof claim comes up years later.

How much does a home solar installation really cost after incentives?

The sticker price rarely matches what you'll pay long-term. A typical residential solar system costs $20,000-$25,000 before incentives, and the federal tax credit currently covers 30% of that through 2032. But salespeople often quote the pre-incentive number as if it's the final price, or worse, structure a lease where you never own the system and never qualify for the credit at all.

Leases and power purchase agreements (PPAs) sound attractive because there's no upfront cost, but you're locked into a fixed escalation rate, often 2.9% per year, for two decades. Run the math on your current utility rate increases before assuming the lease beats staying on the grid. If your utility rate has climbed less than 3% annually, a 25-year lease with built-in escalation can end up costing more than doing nothing.

What happens to your roof when panels go on and come off?

Nobody mentions that removing panels for roof work costs $1,500 to $3,000, and you'll likely need it. Solar panels are typically bolted through the roof deck with lag screws and flashing, and most installers won't touch a roof that's within 5-7 years of needing replacement. If your roof is already showing signs it's aging faster than it should, adding panels now means paying twice: once for the panels, and again in a decade to pull them off, replace shingles, and reinstall.

Ask the installer directly what their removal-and-reinstall fee is and get it in writing. Also ask who's liable if a roof leak develops around a penetration point after installation. Many warranties on the panels don't cover roof damage at all, that's a separate claim against the installer's workmanship warranty, which typically runs only 10 years, far shorter than the panel warranty itself.

Does solar hurt attic ventilation and roof lifespan?

It can, if the installer doesn't account for airflow. Panels mounted flush or with minimal standoff height can block the intake and exhaust vents your roof depends on to shed heat and moisture. Poor attic ventilation already shortens roof life on its own, and a solar array installed without at least 3-4 inches of clearance for airflow can trap heat against the shingles, accelerating granule loss and curling.

Ask specifically how the racking system handles ventilation and whether the installer performed a load and airflow assessment, not just a shading study. A rushed installer who skips this step is optimizing for their install schedule, not your roof's remaining lifespan.

Can your electrical panel actually handle solar, or will you need an upgrade?

Many homes need a panel upgrade the salesperson didn't quote for. Solar systems typically require a 200-amp service to handle the inverter and any battery storage add-on, and if you're still running 100-amp service, that upgrade alone runs $1,800-$3,500 and isn't always included in the quoted price. Ask for a written confirmation of your panel's amperage and whether an upgrade is factored into the total cost, not added as a change order after signing.

| Cash Purchase | Lease/PPA | |---|---| | You own the system, qualify for the 30% federal tax credit | No credit, the leasing company keeps it | | Full responsibility for repairs after installer's 10-year warranty | Leasing company handles most repairs | | Adds home value at resale in most markets | Can complicate a home sale, buyer must assume the lease | | Break-even typically 7-10 years | No break-even, you never stop paying |

What should you check on your roof before signing anything?

Get an independent roof inspection first, separate from the solar company's assessment. Solar installers have an incentive to approve your roof for installation, since that's how they get paid, so their "free inspection" isn't neutral. A roofer with no stake in the sale can tell you honestly whether your shingles have 3 years or 15 years left, and whether it makes sense to replace the roof first before adding a 25-year fixture on top of it.

FAQ

How long do solar panels actually last before losing efficiency?

Most panels carry a 25-year performance warranty guaranteeing at least 80-85% of original output by year 25, with degradation averaging about 0.5% per year. That means real-world output drops gradually, so the "25-year lifespan" salespeople quote refers to warranty coverage, not peak performance the entire time.

Is it true solar panels void my roof warranty?

Often, yes, if the installer penetrates the roof deck without the shingle manufacturer's approval. Check with your shingle manufacturer (GAF, Owens Corning, CertainTeed) before installation, since some require a certified installer to preserve the warranty, and an uncertified install can void coverage on a roof that still has 10+ years left.

What's the difference between buying and leasing solar panels?

Buying means you own the system, qualify for the 30% federal tax credit, and typically break even in 7-10 years through lower bills. Leasing means no upfront cost but no tax credit, a 20-25 year contract with annual price escalations around 2.9%, and potential complications when you sell the home since the buyer must qualify to take over the lease.

Can I remove solar panels myself to do roof repairs?

No, panels are wired into your electrical system and removing them without a licensed electrician disconnecting the system first is a safety hazard and likely voids your warranty. Always call your installer or a licensed solar technician, and budget $1,500-$3,000 for professional removal and reinstallation around roof work.

Do solar panels increase my homeowners insurance premium?

Sometimes, by roughly 5-10% depending on the insurer, since panels add replacement value to the structure. Confirm with your insurance company before installation whether the system is covered under your existing policy or requires a rider, since storm damage to panels isn't automatically included in every standard policy.

This is educational information, not financial or legal advice. Get an independent roof inspection and review any solar contract with a licensed electrician and, if the dollar amount is significant, a consumer attorney before signing.