What is the best solar warranty?

SunPower: 40-year product + 92% at 25yr performance. REC Alpha: 25yr product + 86% at 25yr. JA Solar/Trina: 25yr product + 84.8% at 25yr. All are excellent.

Is the warranty transferable?

Most panel and inverter warranties transfer to new property owners. Check specific terms — some require notification to the manufacturer.

What Warranty Do Solar Panels Have?

By Home Solar Guide Team|Updated 18 March 2026|question

Independently written | Evidence-based | Sources cited

Solar panel warranty coverage — Three layers of warranty protection: panel manufacturer + inverter manufacturer + installer workmanship.

Find out how much you could save

Answer a few questions and receive personalised solar quotes — completely free.

Start My Quote

Free, no obligation. Takes 2 minutes.

Ready to see how much you could save?

Get 3 free quotes from MCS-certified installers in your area.

Get Free Quotes

What warranty comes with solar panels?

Solar panels come with THREE warranties: (1) Panel product warranty (10-25 years): covers manufacturing defects. Best brands: 25 years. (2) Panel performance warranty (25 years): guarantees minimum 80-92% output at year 25. (3) Inverter warranty (5-25 years): string inverters 5-10yr (extendable), micro-inverters 25yr. PLUS (4) Installer workmanship warranty (5-10 years): covers installation quality. Best installers include an Insurance-Backed Guarantee (IBG) for additional protection.

Frequently Asked Questions

Related: Home Heating Systems

Solar panels are most powerful when combined with an efficient heating system. Heat pumps use solar-generated electricity to heat your home at 300-400% efficiency — making them the ideal partner for solar.

heat pump installation process

Heat pump installation typically takes 2-3 days and is best planned alongside solar.

From our sister site Home Heat Pump Guide