Solar Warranties: A Simple Guide

Understanding Solar PV System Warranties: A Comprehensive Guide


Solar energy is a growing industry, with more and more individuals and businesses turning to this clean, renewable energy source. However, as with any investment, potential buyers must understand the warranties accompanying their solar PV systems. This article will delve into the different types of warranties, including solar panel warranties, inverter warranties, and workmanship warranties, highlighting their key features, differences, and what to look out for when comparing offerings from various manufacturers and installers.

Solar Panel Warranties

Solar panel warranties are typically divided into two categories: performance warranties and product warranties.

  1. Performance Warranty: This warranty guarantees that the solar panels will produce a percentage of their initial output over a specified period, usually 25 years. For example, a solar panel may be warranted to produce at least 80% of its initial output after 25 years. This ensures that the system will continue to generate energy efficiently over time.
  2. Product Warranty: This covers defects in the solar panels, such as manufacturing errors, material issues, or other problems that may cause the panels to fail prematurely. Product warranties typically last for 5 or 10 years.

Inverter Warranties

Inverters are a critical component of a solar PV system, responsible for converting the generated electricity into a usable form. Inverter warranties vary depending on the type and manufacturer. The industry standard for string inverters is about 12 years, while module-level power electronics such as microinverters and power optimizers come with a 25-year warranty. It's important to note that inverter warranties usually do not cover labor costs for repairs or replacements but may cover shipping fees for new equipment.

Workmanship Warranties

The installer provides workmanship warranties and covers the quality of the installation itself. These warranties typically range from 1 to 10 years and include coverage for labor costs associated with any repairs or replacements required due to poor workmanship or installation errors. When comparing installers, pay close attention to the duration and scope of their workmanship warranties, as this can be a good indicator of the company's confidence in their installation quality.


Solar PV system warranties are essential to consider when investing in solar energy. By understanding the differences between solar panels, inverters, and workmanship warranties, consumers can make informed decisions and choose the right system and installer for their needs. Always ask specific questions about warranty coverage, response times, and what happens if a component breaks or fails to ensure you get the best investment protection.

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