Renogy RV Tilt Mount Brackets Unlock Your Solar Potential: Versatile, Strong, and Effortless Installation! 0°~90° Flexible Adjustment Easily set the mounting angle from 0 to 90° in approximately 5° increments. Adapt the bracket to any latitude with quick and flexible adjustments. Durable and Long-lasting Constructed with a corrosion-resistant aluminum alloy, this bracket exhibits outstanding load-bearing strength, guaranteeing optimal performance over extended periods in various outdoor conditions. Wide Application Ideal for installation on the roof of an RV or any flat surface, such as boats, motorhomes, sheds, and more. Recommended Bundles for 28-inch Bracket The 28-inch TMB bracket is adaptable to Renogy solar panels up to 220W. For more details on compatible solar panels, refer to the User Manual. Suitable for 100W 12V Monocrystalline Solar Panel Suitable for 200W 12V Monocrystalline Solar Panel Suitable for Bifacial 220W 12V Monocrystalline Solar Panel Recommended Bundles for 50in Bracket The 50-inch TMB bracket is adaptable to Renogy solar panels up to 550W. For more details on compatible solar panels, refer to the User Manual. Suitable for 320W Monocrystalline Solar Panel Suitable for Bifacial 450W Monocrystalline Solar Panel Suitable for 550W Monocrystalline Solar Panel Package Includes 4 x Fixed L-Brackets 2 x Tilt L-Brackets 6 x M8 Plastic Knob Screws 6 x M8 Wing Nuts 4 x M6 x 16mm Hex Cap Bolts 4 x M6 Split Lock Washers 8 x M6 Flat Washers 4 x M6 Hexagonal Nuts 6 x M8 Washers 6 x M8 Spring Washers 10 x 1¼ in Self-Drilling Cap Screws 6 x Plastic Retaining Rings Learn more :is(.rg-pdp #prd-specs, .rg-pdp .data-wg-spes-container) .product-custom-field-group { margin: 0; width: 100%; padding: 10px .75rem; border-bottom: 1px solid #eee; } 28 Inch RV Tilt Mount Brackets Tilt Bracket Dimension-28 inch: 14.57x1.18x0.79 inch Fixed Bracket Dimension-28 inch: 27.95x1.97x0.98 inch Weight-28 inch: 3.5 lbs Material and workmanship warranty-28 inch: 1 Year 50 Inch RV Tilt Mount Brackets Tilt Bracket Dimension-50 inch: 22.64x1.18x0.79 inch Fixed Bracket Dimension-50 inch: 50x1.97x0.98 inch Weight-50 inch: 7.2 lbs Warranty: 1-year material and workmanship warranty 1. Are the brackets made of stainless steel? the brackets are aluminum and the fasteners are stainless steel. 2. Did others recieve wing nuts and washers? My package had the plastic head bolts but no nuts... All mounting parts were included in mine. 3.do you need to ground the aluminum brackets to the vehicle chassis? I didn't bother. The solar panel frame is plastic, so it isn't grounded to aluminum frame. Instructions on panel didn't suggest to do so. 4. Do these brackets fold up if you undo one end? Don't want to mount. I want to pack and use freestanding for my panel. You can unscrew the short ends that connect the two long pieces that make a V on each side and you could fold it up. This is also how you adjust the angle of the sun to the panels. You know, like summer sun is a different angle than winter sun. 5.Can they be tilted while driving? As long as you don't mind sending the panels onto the traffic behind you.... I suppose if you drilled thru the roof and mounted them with 3/8" bolts and oversized fender washers it could be possible to keep them mounted to the roof. As for keeping the panels attached to the brackets; again, that's a mounting hardware issue.