# Solar Panel Lifespan, Degradation & Warranty

> Solar panels last 25–30+ years. Understand degradation rates, performance vs product warranties, inverter lifespan and how to keep a system producing for decades.

Canonical: https://geniussolarservices.com/learn/solar-panel-lifespan-degradation-warranty

Quality solar modules last 25–30 years or more. They lose a small amount of output each year — typically 1–2% in the first year and 0.4–0.55% per year after that, depending on technology. Manufacturers give two warranties: a product (materials) warranty of about 10–15 years and a linear performance warranty of 25–30 years that typically guarantees about 80–87% of original output at the end. Inverters usually last 10–15 years and may need one replacement over the system's life.

- **Module life:** 25–30+ years
- **Annual degradation:** ≈0.4–0.55%
- **Performance warranty:** Up to 30 years
- **Inverter life:** 10–15 years


## Two warranties, two different things

| Warranty | What it covers | Typical term |
|---|---|---|
| Product warranty | Manufacturing defects in materials and workmanship | 10–15 years |
| Performance warranty | Minimum power output over time | 25–30 years |
| Inverter warranty | Inverter defects | 5–10 years |
| Installer workmanship | Structure, wiring, installation quality | Varies — ask |

With Genius Solar you also get **five years of free service** on top of the manufacturer warranties.

## What degradation looks like

A module rated 550 W with 2% first-year and 0.55% annual degradation after that produces roughly:

| Year | Output vs new |
|---|---|
| 1 | ~98% |
| 10 | ~93% |
| 20 | ~88% |
| 25 | ~85% |
| 30 | ~82% |

TOPCon and other n-type modules usually degrade more slowly than PERC.

## What shortens a system's life

- Poor structure: rust, loose clamps, inadequate bracing.
- Water ingress at junction boxes or badly crimped connectors.
- Hot-spots from long-term shading or cracked cells.
- Harsh cleaning: abrasive powders, high-pressure jets, walking on modules.
- No surge or lightning protection.

## How to make it last

1. Use galvanised, well-braced structures.
2. Keep cables in conduit and connectors properly crimped.
3. Clean gently and regularly — see our [cleaning guide](/learn/solar-panel-cleaning-maintenance-indore).
4. Watch the monitoring app for sudden drops.
5. Get a yearly health check of connections, earthing and inverter logs.


Updated: 2026-09-29

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**Genius Solar Services** · G-1, Swarna Palace, Plot No. 1108, Scheme No. 114, Part 1, Vijay Nagar, Near MP Gramin Bank, Indore, Madhya Pradesh 452010 · Phone +91 98267 12299, +91 78288 12299, 0731 400 4499 · geniussolarservices@gmail.com · Mon – Sat · 10:00 am – 7:00 pm
Source: https://geniussolarservices.com