Monolithic bracket for flat roof mounted photovoltaic modules
An integral, monolithic mounting bracket supports a corner of a photovoltaic module. The bracket includes a ballast tray for holding one or more ballast blocks, and includes a plurality of monolithic support legs that are disposed at acute angles from a plane of the ballast tray and that are integral with the ballast tray. The bracket can be manufactured by stamping at least two identical sections of metal from the sheet and then bending-up each section on its remaining uncut fourth side into a near-vertical position, so that each bent-up section forms a monolithic support leg.
1. An integral, monolithic mounting bracket for supporting a corner of a photovoltaic (PV) module, the bracket comprising:
a ballast tray for holding one or more ballast blocks defining a plurality of empty spaces;
a plurality of monolithic support legs, having shapes substantially corresponding to the plurality of empty spaces, that are disposed at an acute angle from a horizontal plane of the ballast tray and that are integral with the ballast tray, wherein the legs lean inwards towards a center of the bracket; and
a plurality of metallic clamp assemblies to clamp the photovoltaic module in place on the support legs, each clamp assembly attached to a support leg with a bolt and a clamp;
wherein each clamp comprises a plurality of rigid, sharp metallic points for piercing a non-conductive anodized aluminum coating of a photovoltaic module frame and creating an electrical bonding path.
2. The integral, monolithic mounting bracket of claim 1 , wherein the integral, monolithic support legs are stamped-out and bent-up from the ballast tray at the acute angle.
3. The integral, monolithic mounting bracket of claim 2 , wherein each empty shape substantially matches a corresponding shape of each support leg that is stamped and bent-up, before any mounting tabs have been bent downwards.
4. The integral, monolithic mounting bracket of claim 1 , wherein the acute angle ranges from 75-89 degrees.
5. The integral, monolithic mounting bracket of claim 1 , wherein the acute angle is 85 degrees.
6. The integral, monolithic mounting bracket of claim 1 , further comprising a horizontal, turned-up rim disposed continuously around a perimeter of the ballast tray.
7. The integral, monolithic mounting bracket of claim 6 , wherein the bracket is symmetric across a plane of symmetry that is oriented substantially perpendicular to the plane of the ballast tray.
8. The integral, monolithic mounting bracket of claim 6 , further comprising a pair of vertical edges disposed on opposite edges of the horizontal rim of the ballast tray.
9. The integral, monolithic mounting bracket of claim 1 , wherein the bracket is symmetric across a plane of symmetry that: (a) is oriented perpendicular to the plane of the ballast tray, (b) is oriented parallel to a first direction, and (c) is located in a middle of the ballast tray.
10. The integral, monolithic mounting bracket of claim 9 , and wherein the bracket is also symmetric across a plane of symmetry that: (a) is oriented perpendicular to the plane of the ballast tray, (b) is oriented parallel to a second direction perpendicular to the first direction, and (c) is located in a middle of the ballast tray.
11. The integral, monolithic mounting bracket of claim 1 , wherein the bracket comprises two support legs.
12. The integral, monolithic mounting bracket of claim 1 , wherein the plurality of support legs comprises four support legs, wherein two of the support legs are taller than the other two support legs.
13. The integral, monolithic mounting bracket of claim 1 , wherein two or more of the brackets are stackable in a nested set.
14. The integral, monolithic mounting bracket of claim 1 , wherein each support leg comprises a plurality of vertical stiffening ribs.
15. The integral, monolithic mounting bracket of claim 1 , wherein each support leg comprises a plurality of integral, monolithic module mounting tabs attached to the support legs, wherein each tab defines a hole for receiving a fastener from one of said clamping assemblies.
16. The integral, monolithic mounting bracket of claim 15 , wherein each module mounting tab is angled at a shallow angle with respect to a horizontal plane, wherein the shallow angle ranges from 0 to 10 degrees.
17. The integral, monolithic mounting bracket of claim 15 , wherein the plurality of module mounting tabs comprises two mounting tabs disposed on each support leg.
18. The integral, monolithic mounting bracket of claim 15 , wherein the plurality of module mounting tabs comprises three module mounting tabs disposed on each support leg.
19. The integral, monolithic mounting bracket of claim 15 , further comprising a pair of adjacent module mounting tabs, wherein one tab is oriented at a positive shallow angle with respect to a horizontal plane, and the other is oriented at a negative shallow angle with respect to the horizontal plane, wherein the shallow angle ranges from 0 to 10 degrees.
20. The integral, monolithic mounting bracket of claim 15 , wherein each module mounting tab is oriented perpendicular to its corresponding support leg.
21. The integral, monolithic mounting bracket of claim 1 , further comprising at least one wire management clip disposed on at least one of the support legs.
22. The integral, monolithic mounting bracket of claim 1 , wherein the ballast tray comprises a plurality of horizontal stiffening ribs.
23. The integral, monolithic mounting bracket of claim 1 , further comprising a detachable profile attached to the mounting bracket to deflect wind.
24. The integral, monolithic mounting bracket of claim 1 , wherein the ballast tray and the plurality of support legs are made of galvanized steel sheet metal.
25. The integral, monolithic mounting bracket of claim 1 , further comprising a pair of spacing tangs protruding upwards from an apex of each support leg, for spacing apart a pair of adjacent photovoltaic modules.
26. An assembly comprising an integral, monolithic mounting bracket of claim 1 and at least one photovoltaic module mounted to the bracket, and at least one ballast block lying in the ballast tray.
27. The integral, monolithic mounting bracket of claim 1 , further comprising a side mount support flange disposed vertically on a side of a support leg and oriented perpendicular to said leg.
28. An integral, monolithic mounting bracket for support a corner of a photovoltaic (PV) module, the bracket comprising:
a ballast tray for holding one or more ballast blocks;
a plurality of metallic monolithic support legs that are disposed at an acute angle from a plane disposed inside of the ballast tray, and that are integral with the ballast tray, wherein the legs lean inwards towards a center of the bracket; and
a plurality of clamp assemblies, each clamp assembly attached to a support leg with a bolt and a clamp;
wherein each clamp comprises a plurality of rigid sharp metallic points for piercing a non-conductive anodized aluminum coating of a photovoltaic module frame and creating an electrical bonding path; and
wherein a turned-up rim is disposed continuously around a ballast tray perimeter.
29. An integral, monolithic mounting bracket for support a corner of a photovoltaic (PV) module, the bracket comprising:
a ballast tray for holding one or more ballast blocks and having a rim disposed around a ballast tray perimeter; and
a plurality of monolithic support legs that are disposed at an acute angle from a horizontal plane disposed inside of the ballast tray, and that are integral with the ballast tray, wherein the legs lean inwards towards a center of the bracket;
wherein each support leg comprises a plurality of integral, monolithic module mounting tabs attached to the support legs, wherein each tab defines a hole for receiving a fastener from a metallic clamping assembly comprising a plurality of rigid, sharp metallic points for piercing a non-conductive anodized aluminum coating of a photovoltaic mounting frame and creating an electrical bonding path; and
wherein each module mounting tab is angled at a shallow angle with respect to a horizontal plane, wherein the shallow angle ranges from 0 to 10 degrees.