Free Quarterly Free Quarterly Home » Support » Free Quarterly [+] SUPPORT Pre-Sales Specialty Post-Sales Services Technical FAQ Warranty Field Support Free Maintenance Offer Fault Reporting Downloads Pre-Sales Specialty Post-Sales Services Technical FAQ Warranty Field Support Free Maintenance Offer Fault Reporting Downloads We provide free quarterly maintenance services during the first year of warranty for every project by Powerex, within Lagos. Subject to the provision of logistics by customer, the free quarterly warranty maintenance is available outside Lagos.