Solar Panel Lifespan and Warranties: What's Actually Covered

Solar panels are durable. Most are warrantied for 25 to 30 years and keep producing beyond that, losing a small share of output each year. The warranties around them are less straightforward. A typical system has several separate warranties from different companies, each covering something different, and the one most homeowners end up needing, the installer’s workmanship warranty, is also the one most likely to vanish if the company fails. Here’s how to read them before you sign.

How long each part lasts

Component	Typical life or warranty	Notes
Panels	25–30+ years	Output declines slowly; warranties guarantee a minimum
String inverter	10–15 years	Expect one replacement over the system’s life
Microinverters and optimizers	Commonly warrantied 25 years	Enphase IQ8 and SolarEdge optimizers carry 25-year warranties
Hybrid inverter (e.g., Powerwall 3)	About 10 years warranty	Per manufacturer; check terms
Home battery	10–15 years warranty	Usually 60–70% capacity guaranteed at end
Racking	Often 25-year hardware warranty	Covers the hardware, not roof leaks

Sources: our equipment research and manufacturer terms as of October 2026. For a 25-year financial model, we assume a 25- to 30-year system life with one string inverter replacement.

Degradation: how much output you lose

All panels lose a little output every year. Two numbers to know:

• Real-world median: about 0.5% per year, from an NREL review of about 2,000 measured degradation rates (Jordan & Kurtz, 2013).
• More recent fleet data: NREL’s PV Fleet study found a median of about 0.75% per year at the system level, with hot climates around 0.88% and cool climates around 0.48%.

Panels also lose a bit more in the first year from light-induced degradation, often about 1%.

Reading a performance warranty

Performance (or power) warranties guarantee a minimum output over time. A common format for 2026 N-type panels: no more than 1% loss in year one, then no more than 0.4% a year after that.

Worked example for a 400 W panel with that warranty:

• After year 1: at least 99% of 400 W = 396 W.
• Each following year: up to 0.4 percentage points more.
• At year 30: 99% − (29 × 0.4%) = 87.4%, or about 350 W.

That 87.4% at 30 years is exactly what Jinko, Trina, JA Solar and others guarantee in our research. Premium panels guarantee more: REC lists 92% at 25 years and Qcells about 90.6% at 25 years for its Q.TRON line. Older P-type PERC panels typically guaranteed about 84% to 86% at 25 years.

What a performance claim involves: you usually need to prove the panel is underperforming, often with testing. The manufacturer may repair, replace or refund a prorated amount. Small, gradual losses are hard to claim. This warranty mostly protects against defective batches, not normal aging.

The four kinds of warranty

1. Panel product warranty

Covers manufacturing defects in the panel itself, like delamination, junction box failures or broken frames from defects. Terms in our research range from 12 to 40 years, with 25 years most common for residential panels.

2. Panel performance warranty

Covered above. It guarantees minimum output, usually for 25 to 30 years.

3. Inverter, optimizer and battery warranties

Separate warranties from separate manufacturers:

• String inverters: commonly about 10 to 12 years, sometimes extendable for a fee (SMA lists 10 years, extendable to 20).
• Enphase microinverters: 25 years.
• SolarEdge: 12 years on the inverter (extendable to 20 or 25), 25 years on optimizers.
• Batteries: limited by years and energy throughput, with a minimum retained capacity. See do solar batteries pay off?.

4. Installer workmanship and roof penetration warranty

This covers the installation itself: wiring, connections, mounting and the holes drilled into your roof. Our research shows workmanship warranties range from 1 to 25 years. Ten years or more is a good benchmark.

This is the warranty you’re most likely to use. Most system failures and roof leaks come from workmanship, not the panels. Some installers offer a separate roof penetration warranty; ask how long it is.

Racking warranties cover the hardware, not leaks. If water gets in around a mount, that’s a workmanship or roof penetration claim against the installer.

Labor coverage: the hidden gap

When a panel or microinverter fails, the part is often the cheap piece. The expensive part is the crew that goes up on the roof to remove and replace it.

Many manufacturer warranties cover the part only. Some cover labor, usually with conditions:

• REC ProTrust: up to 25 years of product and labor coverage when installed by a REC Certified Solar Professional, with system-size limits.
• Qcells: reasonable removal and reinstall cost coverage when installed by a Qcells partner (regional terms vary).
• Enphase: has paid installer labor reimbursement for warranty replacements (check the current schedule).
• Silfab: limited labor reimbursement in the U.S., with a dollar cap.
• Many budget brands (Jinko, Trina, JA Solar, LONGi and others in our research): no labor reimbursement.

If labor isn’t covered, a “free” warranty replacement can still cost you a service call. Ask your installer whether their workmanship warranty covers labor for manufacturer warranty claims during its term.

Watch out: “25-year warranty” in a sales pitch often refers only to the panel’s product or performance warranty. Ask: who issues each warranty, how long is the workmanship warranty, is labor covered, and what’s excluded? See misleading warranties.

A warranty is only as good as the company behind it

Recent history shows how much a paper warranty depends on the company surviving:

• Panel makers: Panasonic exited residential solar in 2025 and LG exited panels in 2022; both say they’ll honor warranties. Meyer Burger became insolvent in 2025 and laid off all U.S. staff, so its warranty claims have little practical recourse. Maxeon was reported under judicial management in Singapore in 2026. See best solar panels.
• Installers: SunPower’s August 2024 Chapter 11 largely wiped out its company-issued workmanship warranties. Freedom Forever’s Chapter 7 left workmanship and roof warranties effectively lost. Sunnova filed for bankruptcy in June 2025.

Prefer manufacturers and installers that are financially solid, and ask whether any warranty is backed by a third-party insurance policy.

What happens if your installer disappears

From our research on recent bankruptcies:

• Manufacturer warranties still apply. Panel, inverter and battery warranties are with the manufacturer, not the installer. You can claim directly, though you may need to pay an independent installer for labor.
• Workmanship and roof warranties are usually lost. These were promises from the installer, and bankruptcy typically discharges them.
• Loans are still owed to the lender, even if the installer is gone.
• Leases and PPAs usually continue under a new servicer. After Sunnova’s bankruptcy, SunStrong Management took over day-to-day servicing for substantially all existing Sunnova customers. SunStrong also services SunPower leases and PPAs.
• Independent service companies can maintain orphaned systems. Omnidian is one example named in our research.

Step-by-step help is in my solar company went out of business.

What to keep on file

Create one folder, paper or digital, with:

• Your signed contract and any change orders.
• Every warranty document: panel, inverter, battery, racking and workmanship.
• Panel, inverter and battery model and serial numbers.
• Permit, inspection and permission-to-operate (PTO) records.
• Monitoring app login and a yearly screenshot of production.
• Photos of the roof and installation, especially flashing, before and after.

These make warranty claims, home sales and insurance claims far easier. See selling a house with solar.

Weather, roofs and insurance

Most warranties exclude damage from hail, wind, falling trees and fire. That’s usually a homeowners insurance matter. See solar weather durability and insurance and solar property taxes and insurance.

If your roof has less than about 10 years of life left, replace it before installing solar. Removing and reinstalling panels for a later re-roof typically costs a few thousand dollars. Our roof replacement timing tool helps you decide, and replace your roof before solar covers it in depth.

Questions to ask before signing

• Who issues each warranty, and for how many years?
• Does the workmanship warranty include roof leaks? For how long?
• Is labor covered for manufacturer warranty replacements? Under whose program?
• Does the warranty transfer if I sell the house?
• Is any warranty backed by third-party insurance?
• If your company closes, who services my system?

Put the answers side by side in the quote comparison tool, and once your system is running, check its output each year with the production checker so you catch problems while warranties still apply.