How Long Is the Warranty? How to Resolve Quality Issues?

1. Types of Solar Warranties

Solar components come with different types of warranties, and it's crucial to distinguish them:

Product Warranty (Materials & Workmanship)
Covers defects in materials and manufacturing. Typically lasts 10 to 15 years for panels and 5 to 10 years for inverters or batteries.
Performance Warranty
Guarantees that panels will maintain a certain output level over time. A standard is 25 years, with a linear power degradation guarantee (e.g., 90% output in year 10, 80% in year 25).
Installation Warranty
Offered by the installer, usually 1 to 10 years, covering workmanship issues such as mounting, wiring, or sealing.

Degradation Rate: Check the panel's annual degradation rate — lower is better.
Inverter Coverage: Inverters often have shorter warranties; extended coverage is sometimes optional.
Transferability: A good warranty should remain valid even if you sell your house.
Claim Conditions: Review whether you must register the product, use approved installers, or conduct regular maintenance.

Even comprehensive warranties have exclusions. Common ones include:

If a product underperforms or fails, here's how to proceed:

Document the Issue
Take photos, record error messages, and track performance drops.
Contact Your Installer First
For turnkey systems, installers usually handle initial assessments and claims.
Reach Out to the Manufacturer
Provide proof of purchase, installation documents, and any diagnostics.
Follow Up in Writing
Keep all communications via email for recordkeeping.
Seek Local Support
Brands with authorized local partners or service centers offer faster response.

Component	Standard Warranty	Premium Warranty
Solar Panel	10–12 years (product) / 25 years (performance)	Up to 25 years (product) / 30 years (performance)
Inverter	5–10 years	Up to 15 years
Battery	5–10 years	Up to 15 years
Installation	1–5 years	Up to 10 years

Tip: Leading brands like Jinko, LONGi, and Huawei offer extended product and performance warranties backed by global service networks.

At Sunpal, we ensure:

Certified, high-quality components with reliable warranties
Clear warranty documentation provided at purchase
Top-notch service teams to support product performance and address issues quickly
Online support for warranty registration and claims

For any quality-related concerns, Sunpal customers can reach our support team 24/7 via phone, email, or our service portal.