RET provides after sales service division, which is available only to customers who install RETROOF the system are guaranteed period
Service cleaning all panel, there will be washed 2-3 times a year , depending on the agreement on promotion
Check all the system 2-3 times per year depending on the terms , including promotions such as 
2.1 Check all panel and the connection of the panel to view any disorders and monitoring also reporting for customer.
2.2 Check the operation of the system controller and inverter , as well as monitor and test the grounding Inspection and Testing of Grounding System.