Quick Answer
Typical solar panel warranties last between 25 and 30 years, with manufacturers often offering a 10-year warranty for the panels' electrical components and a 25-year warranty for their power output.
Warranty Breakdown
When purchasing solar panels, it’s crucial to understand the warranty offered by the manufacturer. Most solar panel warranties are divided into two parts: the power output warranty and the materials warranty. The power output warranty, also known as the performance warranty, guarantees that the solar panels will maintain a certain percentage of their original power output over a specific period, typically 25 years. This warranty ensures that the solar panels will continue to produce electricity at a specified rate, usually 80% or more of their original power output.
Materials Warranty
The materials warranty covers the solar panels’ electrical components, such as the inverters, mounting systems, and wiring. This warranty typically lasts for 10 years and covers any defects or malfunctions in these components. If a component fails during the warranty period, the manufacturer will repair or replace it free of charge. It’s essential to note that the materials warranty may not cover external factors such as weather-related damage or wear and tear.
Roof Mount Considerations
When installing solar panels on a roof, it’s essential to ensure that the mounting system is designed to last for the lifetime of the warranty. A good roof mount should be able to withstand various weather conditions, including high winds, heavy snow loads, and extreme temperatures. A ballasted roof mount, for example, uses weight to secure the solar panels in place, while a rail-based system uses a series of rails to support the panels. Both systems can be effective, but it’s crucial to choose a mount that is designed for the specific climate and roof type.
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