●Wide application: adjustable solar panel mounting brackets for off-ground solar systems, compatible with 100-400W solar panels. Great addition for use on boats, RV, roof, marine etc. ●【High Efficiency】: Ideal for positioning solar panels at an angle on a roof. Gain up to 25% more efficiency by tilting your panels towards the sun instead of laying them flat. Maximum tilt angles depend on the size of the solar panels. ●Easy to install and adjust: quick assembly with stainless steel fasteners and precise hole placement. The package includes the bracket between tilt and panel. ●Lightweight but strong: aluminium alloy material, with light weight, large load capacity and strong corrosion resistance, suitable for all environments and ideal for easy transport and safe installation. ●Safety and reliability: The structure takes into account the load capacity, wind resistance, earthquake resistance and other factors and through strict calculations and tests to ensure safety and reliability. Lifespan: more than 10 years.