... impact resistance; 3. Anodized aluminum alloy frame with high mechanical strength for easy installation; 4. Anti-aging EVA and high flame ... . Rural electrification, Small home power systems; 3. Power supply for traffic, security, gas industry; 4.12V and 24V battery charging ... span, easy installation, wind protection * High quality product warranty for 25 years,after 10 years of use .the panel effciency ...