F O R M 2
THE PATENTS ACT, 1970
(39 of 1970)
COMPLETE SPECIFICATION
(See section 10 and rule 13)
1. TITLE OF THE INVENTION
ROOF TOP MOUNT FOR RACKING PV SOLAR PANELS
2. APPLICANT(S) I
(a) NAME WAAREE ENERGIES LIMITED
(b) NATIONALITY INDIAN Company
(c) ADDRESS 602, WESTERN EDGE-I,
OFF. WESTERN EXPRESS HIGHWAY, BORIVALI (EAST), MUMBAI-400066 MAHARASHTRA
[INDIA

FIELD OF INVENTION
The present invention relates generally to an arrangement for roof top mount for racking and installing photovoltaic solar panels. More particularly, the present invention relates to a roof top and hat shaped photovoltaic solar panel mounting support arrangement (ballast tray) providing robust structure and enhanced attachment features for solar panels.
BACKGROUND ART
Solar cells and solar cell modules convert sunlight into electricity. These devices are traditionally mounted outdoors on rooftops or in wide-open spaces where they can maximize their exposure to sunlight. Rooftop mountings are of particular interest in urban settings where open space is limited for traditional ground-mounted installations. Rooftops provide much of the sunlight receiving surfaces in such urban settings and low cost module mountings for such rooftops would drastically increase the number of installations that can be made in such environments.
Photovoltaic panels, often referred to as "solar panels" or "PV panels”, are rectilinear assemblies of photovoltaic cells. The panels are typically mounted in arrays on rooftops, decks or on the ground to supply electricity to an infrastructure, such as a building, or to the electrical grid. For best effect, the arrays are oriented to the sun's incident angle at any place and time, the tilt angle of the array being variable by location and also by season. The preferred angle is latitude minus 15 degrees in the summer and latitude plus 15 degrees in the winter.
The mounting systems of current practice often employ fasteners to anchor to the mounting surface and to the PV panel through drilled holes. Adjusting the location of the panel involves unfastening and refastening the hardware, often with new drilling required. Adjustment of angle involves the adjustment of the length of the support struts, providing such adjustment is afforded in the design, in addition to repositioning the fasteners. Of course, the location can be changed more easily with a ballast-mounted installation since the rack is anchored in that case only by weight. Some roof

top installations require reinforcement of the roof to offset the combined weight of panels and supporting racks. The racks themselves may be a significant part of the overall load. It becomes critical, particularly when using ballast, to offset the weight of the racks by selecting high strength materials, minimizing cross- sections, and using shape rather than mass to add stiffness. This type of weight- efficient design is lacking in the current technology of mounting systems.
For providing low cost solar modules arrays for roof tops, in particular flat rooftops, the problem lies in part on not only in reduced material costs for the solar panels themselves, but also reduced installation costs. One aspect may involve using simplified mounting techniques and minimizing the number of roof surface penetrations. Lift-off of solar modules from the roof is possible due to wind, and hence weight or locking down/connecting the modules to the roof is desired. As seen in Figure 1, the various drawbacks with pictures are discussed in detail. This creates numerous moisture entry points when such mounts are secured to the rooftop. Each of these entry points needs to be properly sealed to maintain the integrity of the roof and prevent moisture penetration through the roof. The large number of penetrations associated with conventional rooftop mountings creates additional points of failure for the roof and increases the installation time to secure each of the mounts to the roof and seal any and all roof penetrations.
If given the option, many consumers would generally prefer not to have or at least minimize the number roof penetrations to lock down panels, due to the risk of leaks etc. Therefore, ballasted or weighted systems are common to keep panels from lifting off from the roof. This has the disadvantage of these heavier ballasted systems is that the increased load on the roof may be too high for the structural design of roof, requiring reinforcement, seismic retrofits, ballast material, or simply not mounting on such roofs. Although such a system may reduce the number of roof penetrations, it does so at the cost of additional structural reinforcements that adds to final bottom line costs of the installation.

In the prior art U.S. Pat. No’s 5,746,839, 6,570,084 are examples of implementations involving non-tilted solar panels. While non-tilted solar panels do present a lower profile with respect to wind forces, they are less efficient at converting solar energy to electrical energy when installed at locations with higher latitudes. Another U.S. Pat. No. 6,968,654 discloses an example of an enclosed tilted solar panel system. While such a design offers advantages such as improved rigidity, less debris accumulation, and better protection of electrical components, an enclosed solar panel system increase the cost and weight of the system, is likely to increase wind-induced drag forces and also significantly reduces beneficial cooling from natural airflow.
Another prior art includes US8266848B, US2012318323A1 and WO2010063018A. Missing in the prior art is an easily adjustable and easily movable rack system, which requires no drilling or special tools and which can be setup and repositioned within minutes. Even when the installation angle is fixed by design, there is a need for simplicity, low cost fabrication, and an efficient use of weight-to-strength-ratio.
If given the option, many consumers would generally prefer not to have or at least minimize the number roof penetrations to lock down panels, due to the risk of leaks etc. Therefore, ballasted or weighted systems are common to keep panels from lifting off from the roof. This has the disadvantage of these heavier ballasted systems is that the increased load on the roof may be too high for the structural design of roof, requiring reinforcement, seismic retrofits, ballast material, or simply not mounting on such roofs. Although such a system may reduce the number of roof penetrations, it does so at the cost of additional structural reinforcements that adds to final bottom-line costs of the installation.
Due to the aforementioned issues, improved rooftop mounting schemes are desired for solar cell modules, and/or similar photovoltaic devices.
OBJECT OF INVENTION

It is an object of the invention to provide a robust roof top mounted ballast solar array mounting arrangement having unique installation, load distribution, and grounding features, and which is adaptable for mounting solar panels having no external frame.
It is another object of the present invention is to provide a solar array mounting arrangement which includes flexible, pedestal-style feet and rigid links connected in a grid formation on the mounting surface and supports a plurality of photovoltaic modules that are installed on a ground surface.
It is another object of the invention to provide a roof top mounted ballast solar array mounting arrangement that is easy and quick to install without using heavy equipment or cumbersome component attachments and eliminates heavy site traffic from heavy machinery that can damage the roof top surface without expensive repairs.
It is accordingly an object of the present invention to provide an array of PV panels by simple and inexpensive means and materials. It is further object that the ballast mount are preformed and be easily assembled and adjustable as to inclination and location within very less time. It is a further object that no drill holes are required in assembly except preformed holes. It is further object that assembly involve set of adjustable clamps for holding the PV panels in place. Attachment to the PV panel be accomplished by clamping means. It is further object that to avoid on-site welding; all structural components can be assembled directly on the field using the fasteners supplied with the system, which require the use of standard tools.It is a further object that weight of the structural components of the arrangement, other than ballast, be pared to the minimum required to achieve strength. It is a further object that strength requirements include protection from damage by wind incidence.
As this is not intended to be an exhaustive recitation, other embodiments may be learned from practicing the invention or may otherwise become apparent to those skilled in the art.

SUMMARY OF INVENTION
The present invention addresses the above-mentioned technology gaps by using ballast to anchor the preformed tray like structures to a roof or mounting surface. One novel feature includes using clamps to attach the rack to the PV panels without drilling holes on roof tops and marring the panels. Another novel feature involves shaping thin sheet metal strips to provide both structural stiffness and flex modulus in one upright supporting element. This is accomplished by shear-bending the strips to form a composite of hat shaped single component, shaped for flexibility at the ends and the other for stiffness between the ends.
Therefore such as herein described there is provided a roof top mounted solar PV racking arrangement, comprising: a plurality of slotted ballast trays stabilized with a plurality of ballasts that are placed on a roof top to prevent said ballast trays from moving and shifting from one or more external forces and disturbances; a plurality of solar photovoltaic modules that converts solar light into electrical energy with utilization of said ballast trays; a plurality of clamps to secure said photovoltaic modules placed onto said ballast trays; and a plurality of fasteners to secure said clamps and ballast trays, together forming said roof top mount ballast solar racking system; wherein the ballast trays are prefabricated by bending sheet metal to include vertical support, base plate and a tilt angle in horizontal section.
In an embodiment the ballast tray arrangement for a plurality of PV panels is manufactured by simple and inexpensive means and materials. Further the tray is designed to be easily assembled and install and no drill holes are required in assembly. The attachment to the PV panel is accomplished by clamping means and the weight of the structural components of the tray, other than ballast, be pared to the minimum required to achieve strength.
In an exemplary embodiment, the roof top mounted ballast solar array mounting arrangement that eliminates the need for a costly and lengthy process addressing possible damaging environmental concerns with three variants namely

1) Non-penetrating, ballast mounted RCC rooftop
2) Penetrating type with anchor bolts on RCC slab, Ballast is not required in this case
3) Penetrating type with Pop type Rivets on Metal sheet roofs.Ballast is not required in this case.

Description INVENTION Other Rooftop solutions
1 Foundation/Support System Can be installed by penetration or non-penetration over RCC or Steel roofs Pedestals are to be constructed above roof slab and are bonded with the existing slab using suitable bonding agent. Column post is inserted in to the pedestal.
2 Connections Only connections are the module mounting clamp bolts Multiple components need to be connected.
3 Module type Both 60 and 72 cell modules can be installed in landscape orientation Have to be manufactured to module specifics.
4 Wind resistance The design concept enables seamless wind resistance without any deflectors. Deflector plates are required
5 Components Single main component Multiple components
6 Stacking/Transportation / Recycle/Relocation Single component and can be easily stacked, transported, recycled and relocated. Multiple components, each of which would require different Stacking /Packing & relocation methodology
As this is not intended to be an exhaustive recitation, other embodiments may be learned from practicing the invention or may otherwise become apparent to those skilled in the art.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS Various other objects, features and attendant advantages of the present invention will become fully appreciated as the same becomes better understood through the accompanying drawings and the following detailed description, in which like reference

characters designate the same or similar parts throughout the several views, and wherein:
FIG. 1 illustrates a pictorial comparison chart showing the benefits of the present invention with respect to the prior art roof top solutions;
FIG. 2 is a front perspective view of an adjustable embodiment of the ballast tray in accordance with the present invention;
FIG. 3 is a front perspective view of an embodiment of the ballast in accordance with the present invention;
FIG. 4(a) and (b) are front perspective view of an embodiment of the middle clamp and end clamp in accordance with the present invention;
FIG. 5 is a front perspective view of an bolts used in fastening the components in accordance with the present invention;
FIG. 6 is a front perspective view of an photovoltaic panel in accordance with the present invention;
FIG. 7 illustrates the dimensions of the ballast tray in accordance with the present invention;
FIG. 8 illustrates the dimensions of the ballast in accordance with the present invention;
FIG. 9 (a) and (b) illustrates a front view of the assembled ballast tray, ballast and PV panel in atilt condition and separated condition in accordance with the present invention;

FIG. 10 illustrates a roof top ground reference point for installation of the PV panels on ballast tray in accordance with the present invention;
FIG. 11 illustrates a roof top ground grid marking for installation of the PV panels on ballast tray in accordance with the present invention;
FIG. 12 illustrates the markings on the ballast tray in accordance with the present invention;
FIG. 13 illustrates the ballast tray placing in accordance with the present invention;
FIG. 14 (a) and (b) illustrates the ballast placing on ballast tray in accordance with the present invention;
FIG. 15 (a) and (b) illustrates middle clamp fixing on ballast tray in accordance with the present invention;
FIG. 16 (a) and (b) illustrates end clamp fixing on ballast tray in accordance with the present invention;
FIG. 17 (a) and (b) illustrates the method of module fixing to clamps in accordance with the present invention;
FIG. 18 (a) and (b) illustrates the method of module arrangement row wise in accordance with the present invention;
FIG. 19 (a) illustrates the method of placing the ballast tray HAT for South / East / West Slope in accordance with the present invention;
FIG. 19 (b) illustrates the method of placing the ballast tray HAT for North Slope in accordance with the present invention;

FIG. 20 illustrates the method of placing EPDM rubber below the ballast tray HAT in accordance with the present invention;
FIG. 20 (a) and (b) illustrates the method of mechanically anchoring the ballast tray HAT as roof to tray connection in accordance with the present invention;
FIG. 21 illustrates the three dimensional roof top independent row ballast engineering drawing with all dimensions in accordance with the present invention;
FIG. 22 illustrates the scale representation of the ballast tray HAT in accordance with the present invention;
FIG. 23 illustrates the front perspective view of the stacked ballast tray for transportation in accordance with the present invention;
DETAILED DESCRIPTION
The phrase “in one embodiment” is used repeatedly. The phrase generally does not refer to the same embodiment, however, it may. The terms “comprising”, “having” and “including” are synonymous, unless the context dictates otherwise.
FIG. 2 illustrates a front perspective view of an adjustable embodiment of the hat shaped roof top ballast tray, in accordance with one embodiment of the present invention. The roof top mounted ballast tray configured for solar PV panel arrangement system includes a plurality of ballast trays, a plurality of vertical support brackets ballasts and a plurality of photovoltaic modules. The ballast trays are placed on a roof top surface and are stabilized with a plurality of ballasts as shown in Fig 2 are regular 4” or 5” solid cement blocks with a min. weight of 20 kg. The ballast are designed to prevent the roof top mounted for solar PV panel arrangement from moving and shifting from external forces and disturbances such as the wind or other suitable external forces or disturbances. The design of the ballast follows all current and applicable codes, such as IS 2185(Part-I):2005. The concrete blocks should have

dimensions of 390x190x140mm or 390x190x125mm” with a weight of 18 to 25kgs unless otherwise noted. Further Ballast should have a minimum net area compressive strength of 3.5N/mm2 or must comply with IS 2185(Part-I):2005.
Number of Ballast per tray is 2.The ballast trays are made of material like Aluminium /PG /POSMAC/ Glass reinforced nylon or any other polymeric or alloy structural material having dimensions as shown in Fig 8, 21 and 22, which will eliminate corrosion from dissimilar materials such as galvanized steel and cement products. The ballast trays are moulded with a snap-in feature accepting the bottom base plates on opposite sides becomes an integral part of the tray. The disclosed ballast trays eliminate the necessity for expensive push piers, helical screws, and foundations that are required as part of penetrated systems.
The ballast trays are configured for distributed loads over roof top conditions with minimal bearing capacity. This allows the solar PV panel arrangement to be potentially installed at a relatively larger number of roof tops. The ballast trays are designed and constructed to nest and are stackable for ease of compactness for shipping and handling. The ballast trays 110 are made of plastic material that is inert to the paver calcium & lime content.
There is no need for any vertical support brackets as the design of the ballast tray makes it vertically stable as it is manufactured with be manufactured in HDG (Hot dip galvanized), PG (Pre-galvanized), POSMAC, Glass reinforced nylon, Aluminium & any other polymeric or alloy structural material as long as the deflection and strength criteria is adhered. The design of the ballast tray is designed for the wind speed of 150 kmph confirming to IS 875:2015, Part 3, IS 801 (1975). The present design as such can be used for more than 60% of the India’s geographical locations. For the rest of India with wind speeds more than 150 kmph, the section properties of the existing design shall be upgraded, keep the design concept same. Some the physical characteristics are mentioned below for reference an as shown in fig 22 and 23.

Tilt Angle 10 deg
Row spacing (module to module ends) MIN. 320mm.
Compatible modules All 60 Cell and 72 Cell & Merlin modules
Material HDG / PG / POSMAC
Module Orientation Landscape
Wind load criteria As per IS 875-2015, Part 3 ; ASCE 7-10 up to 150 kmph
Warranty 25yrs
Disassembly Simple disassembly and 100 % recyclable content
Ballast requirement Regular 4” or 5” solid cement blocks with a min. weight of 20 kg.
Dimensions

H1 : 241.1mm H2: 354mm W1: 650mm W2: 450mm
How this product can be used 1) Non-penetrating, ballast mounted
RCC rooftop
2) Penetrating type with anchor bolts on
RCC slab, Ballast is not required in this
case
3) Penetrating type with Pop type Rivets
on Metal sheet roofs.
Onsite customization Possible. If there are any RTUs (roof top units like exhaust fans, DG sets, etc) , “RoofHat-W1” can be installed at any location based on onsite space availability and shadows.
Complete assembly relocation Possible and doesn’t require any additional components. Plug and play solution
Stackability Easily stackable
The solar PV modules as shown in Fig 6 are typically solar modules that convert solar light from sun into electrical energy with the utilization of the ballast trays and can be any suitable type of photovoltaic modules. The ballast trays are spaced suitably as shown in Fig 9, 18 photovoltaic modules or in any other suitable spacing to provide stability to the mounted ballast solar PV arrangement.

The roof top mount ballast solar racking system includes a HAT shaped horizontal ballast tray, a plurality of middle clamps, end clamp and a plurality of fasteners (bolt) as shown in Fig 4 and 5 respectively. One set of bolt consists of 1 Bolt, 2 plain washers, 1 spring washer and 1 nut. As example, HDG5.6 bolts, washers, and nuts are used. The hardware is available in 304 and 316 Stainless Steel.
The ballast tray is slotted which allow and accommodate relatively minor adjustments to maintain the PV panel tilt level. The horizontal support channel 140 includes a pair of parallel rails 142 that are supported by the vertical support brackets 120, as illustrated in FIG. 1B. The middle and end clamps releasably secure the plurality of photovoltaic modules placed onto the said tray as desired by a user. The clamps can be any suitable type of clamp to releasably secure the plurality of photovoltaic modules placed onto the horizontal portion of the tray. A plurality of fasteners such as any combination of one or more stainless steel pop rivets, nuts and bolts are utilized to secure the clamps onto the plurality of ballast trays together forming the roof top mount ballast solar PV panel arrangement.
The roof top HAT shaped ballast tray was designed and developed in order to support photovoltaic modules that are installed on a surface. The system herein disclosed is intended to make installation relatively quick and easy without the use of heavy equipment or cumbersome component attachments. Also, costly ground penetrations are avoided with using ballast to secure the system. The assembly of the components is relatively fast and easy with all fastening requirements occurring on the top of the ground mounted solar racking system without having an assembler to position their body in an awkward position to install. The preformed ballast tray is adjustable to allow for variance in uneven roof top to help maintain a uniformed tilt angle set at in the range of approximately 0 to 10 degrees. The mounted solar panels can be used on various suitable inclined surfaces. The system supports solar modules at a tilt of up to 10 degrees to optimize solar production in a defined space or area. The solar modules are mounted on two parallel disposed ballast trays made from light gauge galvanized steel.

The main component of the assembly, i.e the ballast tray, has several significant
features:
(i) It is HAT shaped light weight shop-fabricated with a tilt angle of an array for
ease of installation. (ii) It has a horizontally tilted potion supported by slanting legs configured to
accommodate the ballast load over its legs at their touching points on roof. (ii) It utilizes bolts and nuts that allow for a top and down installation and that
reduce the need for more hardware in the field.
A ballast tray is designed to include base portion at bottom accommodating the ballast and work together to sandwich the ballast tray to provide reinforcing and strength. In an embodiment the bottom base plate utilizes press nuts to eliminate use of ballast and allow for a top down installation process.
The system is so ergonomically and scientifically designed that the proper installation, handling, connection and maintenance is easy. The disclosed one-piece solar racking system is designed for both low-pitch roofs and flat roof installations. It is made from HDG / PG / POSAMC steel, for strength and durability. It is also designed for simple assembly and disassembly and is 100% recyclable. The disclosed systems are compatible with all common solar panels currently on the market. The universal design enables the installation of 60 and 72 cell modules and merlin module in landscape. All attachments are top mount, enabling easy access. Headquartered in Mumbai, we welcome you to let us know how we can best serve your needs and look forward to providing you the highest quality, lowest cost solar racking solutions available.
The MMS has been designed and built with the aim to ease of installation. Our system is the fruit of a complex work of engineering conducted by our engineers, and subjected to specific load and wear tests.

INSTALLATION SCHEME
REFERENCE POINT MARKING
As shown in Fig 19(a), the installation scheme of the PV panels and the ballast tray
arrangement is done by locating the South - West or South - East corner of Array and
mark the setback line. The reference point is marked at south west corner measuring
90mm from west setback line.
As shown in Fig 19(b), during the installation scheme of the PV panels, the grid line marking is carried out starting from reference point measuring 2m along the East and 1.295m along the North. The Spacing along the North can be increased as the rows are independent and 1.295m is the minimum requirement.
BALLAST TRAY PLACING
The placing of the Ballast tray is carried out using following steps:-
Place the trays with lower end facing south for high efficiency of module.
Place the trays on grid lines, matching the markings on tray with grid lines as
shown in Fig. 13.
Match the left marking of west side trays and right marking of east side trays
with grid lines. Refer Fig. 12 for markings on tray.
BALLAST PLACING
The placing of the Ballast is carried out using following steps:-
Place the ballast on bottom plate on either side of each tray as shown in Fig
14(a) and (b).
CLAMP FIXING
The fixing of the middle clamp and the end clamp is carried out using following steps:-
Connect the mid clamps to the middle trays through centre slots using 1
No. of M10 bolts as shown in Fig. 15(a) and (b).

Connect the end clamps to the end trays through end slots using 1No. of M10 bolts as shown in Fig. 16(a) and (b).
MODULE PLACING
The fixing of the PV modules using middle clamp and the end clamp is carried out
using following steps:-Place the PV modules above the tray in landscape in between the clamp lip and the tray as shown in Fig. 17(a) and (b). The module arrangement as per row wise alignment is shown in 18(a). The final arrangement of structure is shown as Fig 18(b). After which, the electrical installations can be taken up.
PITCHED ROOF MOUNTING
Ballast Tray (HAT) PLACING
For mounting on pitched roof (Steel) place the tray above roof sheet as
follows.
If the slope is towards South/East/West, place the tray as shown in Fig. 19(a) and if the slope is towards North place as shown in Fig. 19(b). The spacing is shown in Fig 9(b).
EPDM RUBBER PLACING
For dampening of any vibrations and further providing insulating provisions
the rubber padding are used as follows.
Place the EPDM rubber below HAT at desired locations of bolting as
shown in Fig. 20.
MECHANICAL ANCHORING
For fastening of the assembly to the roof, in an exemplary embodiment the
tray (HAT) is connected with roof sheet using pop type rivets as shown in Fig.

21(a) and (b). Further the clamp and module fixing is done as shown in Fig 15-18.
The installation of solar modules requires a great degree of skill and should only be performed by as described in detail with respect to figures. It is therefore advisable to carry out installation processsuch that the Array substrate supports should be in full contact with the roof or the ground. Any indication of uneven distribution of weight should be evaluated and corrected before continuing with electrical finishing.
Although the foregoing description of the present invention has been shown and described with reference to particular embodiments and applications thereof, it has been presented for purposes of illustration by way of examples and description and is not intended to be exhaustive or to limit the invention to the particular embodiments and applications disclosed. It will be apparent to those having ordinary skill in the art that a number of changes, modifications, variations, or alterations to the invention as described herein may be made, none of which depart from the spirit or scope of the present invention. The particular embodiments and applications were chosen and described to provide the best illustration of the principles of the invention and its practical application to thereby enable one of ordinary skill in the art to utilize the invention in various embodiments and with various modifications as are suited to the particular use contemplated. All such changes, modifications, variations, and alterations should therefore be seen as being within the scope of the present invention as determined by the appended claims when interpreted in accordance with the breadth to which they are fairly, legally, and equitably entitled.

WE CLAIM:
1. A roof top mounted solar PV racking arrangement, comprising:
a plurality of slotted ballast trays stabilized with a plurality of ballasts that are
placed on a roof top to prevent said ballast trays from moving and shifting from
one or more external forces and disturbances;
a plurality of solar photovoltaic modules that converts solar light into electrical
energy with utilization of said ballast trays;
a plurality of clamps to secure said photovoltaic modules placed onto said
ballast trays; and
a plurality of fasteners to secure said clamps and ballast trays, together forming
said roof top mount ballast solar racking system; wherein the ballast trays are
prefabricated by bending sheet metal to include vertical support, base plate and
a tilt angle in horizontal section. .
2. The roof top mounted solar PV racking arrangement as claimed in claim 1, wherein said ballasts are disposed on said ballast tray over base plate portion.
3. The roof top mounted solar PV racking arrangement as claimed in claim 1, wherein the external forces and disturbances include wind, vibration.
4. The roof top mounted solar PV racking arrangement as claimed in claim 1, wherein said ballast trays are made of HDG (Hot dip galvanized), PG (Pre-galvanized), POSMAC, Glass reinforced nylon, Aluminium & any other polymeric or alloy structural material..
5. The roof top mounted solar PV racking arrangement as claimed in claim 1, wherein said solar PV panels are rested on the said ballast trays and are fastened with clamps.

6. The roof top mounted solar PV racking arrangement as claimed in claim 1, wherein the clamps are of two types namely middle clamp and end clamp.
7. The roof top mounted solar PV racking arrangement as claimed in claim 1, wherein the said ballast trays designed to stack one over the other.
8. The roof top mounted solar PV racking arrangement as claimed in claim 1, wherein said ballast trays include three variants namely;

a) Non-penetrating, ballast mounted RCC rooftop;
b) Penetrating type with anchor bolts on RCC slab wherein ballast is not required;
c) Penetrating type with Pop type Rivets on Metal sheet roofs wherein ballast is not required.

9. The roof top mounted solar PV racking arrangement as claimed in claim 1, wherein said arrangement includes EPDM rubber sheets below the base plate section.
10. The roof top mounted solar PV racking arrangement as claimed in claim 1, wherein said tilt angle is fixed at 10 degrees.