When should you replace a solar panels?

Roots plans for year 25, measured from installation. That is a planning horizon, not an expiry date: budget for the replacement then, and keep using it while it works.

By Roots Team · Jul 10, 2026 · Updated Aug 17, 2026

How long does a solar panels last?

How long a solar panels lasts

Published service life: 20–30 years. Roots plans for: year 25.

Service life is a planning horizon, not an expiry date. It tells you when to start budgeting, get a second quote, and stop paying for repairs on something near the end — not the day it stops working.

What changes this

Panels degrade gradually rather than failing, and most carry a production warranty out to around this horizon. The INVERTER is the part that gets replaced first and surprises owners — neither approved source gives it a figure, so Roots does not publish one.

Sources

InterNACHI's Standard Estimated Life Expectancy Chart for Homes. Single source — the NAHB study predates residential solar being common and does not list it.

Service-life figures are typical estimates drawn from published industry references. Where a second reference covers the component, the figure is cross-checked against it and any disagreement is set out above; where only one reference covers it, that is stated. Actual life varies with installation, water quality, climate, and maintenance, and these figures shouldn't be relied on for insurance, lending, or warranty decisions.

Maintenance is what decides where in the range you land

The published range is wide for a reason: two identical units, installed the same day, routinely fail years apart. What separates them is upkeep.

For a solar panels, the tasks that matter most:

Roots tracks the age of every component in your home alongside the upkeep that extends it, so the replacement is a planned expense instead of an emergency.

Free tool Know what's due before it fails Knowing how long a component lasts only helps if you're maintaining it. Build a free maintenance checklist tuned to your home. It takes about 30 seconds and there is no signup.

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Frequently asked questions

How long does a solar panels last?: Typically 20–30 years. Roots plans a replacement at year 25.
When should you replace a solar panels?: Roots plans for year 25, measured from installation. That is a planning horizon, not an expiry date: budget for the replacement then, and keep using it while it works.
What shortens the life of a solar panels?: Panels degrade gradually rather than failing, and most carry a production warranty out to around this horizon. The INVERTER is the part that gets replaced first and surprises owners — neither approved source gives it a figure, so Roots does not publish one.

Never think about this schedule again.

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