The Primo and Symo inverters come with a 10 year warranty as standard. By purchasing this, the warranty is extended by 5 years to give you 15 years warranty in total. The warranty extension covers cost of materials.
The warranty provides a 5 year warranty extension for the below inverter:
• Primo - 15.0-1
• Symo - 15.0-3 / 17.5-3