After-sales services refer to the support and services provided to customers after they have purchased a product or service. In the context of solar panels, after-sales services may include.

 

1. Warranty and guarantee
2. Maintenance and repair
3. Technical support
4. Spare parts supply
5. Upgrades and modifications
6. Performance monitoring
7. Energy audit and analysis
8. System optimization
9. Training and education
10. Customer support and helpline.