IronRidge's Flush Mount and Tilt Mount Systems solar panel roof mounting systems for sloped roofs and flat roofs, respectively. Both mounting systems support extreme wind and snow loads, though the actual load maximums are determined by which model of XR Rail is used (XR10 supports the least weight while XR1000 handles just about anything). The mounting hardware used in both these solar panel roof mounting systems is made of aluminum and stainless steel to ensure complete corrosion resistance.
Tamarack Solar's roof mounting kits are just as easy to install as IronRidge's, and are even easier to shop for because they're sold as kits where everything is included except for roof attachments. These kits work with most third-party roof attachments for composition shingle, tile, and metal roofs - including IronRidge FlashVue, S-5 Clamps, Solar Roof Hooks, Quick Mount PV, and any other roof attachment that can be used with a 5/16" bolt.
Another great feature of these kits is that they can be shipped by UPS!