01Manufacturer at a glance
RPK Green Trading is a solar module mounting structure (MMS) manufacturer based in Chennai,
Tamil Nadu, India, supplying rooftop racking systems to solar EPC contractors across India.
We extrude our own aluminium rail rather than buying sections in, so the sections below are our own
profiles rather than a generic bought-in extrusion.
- Company
- RPK Green TradingSole proprietorship · Chennai, India
- Established
- 2015Ambattur, Chennai
- Product
- Aluminium MMSRooftop solar mounting structures
- Manufacturing capacity
- 55 MW / monthModule mounting structure
- Supplied to date
- 2+ GWCumulative project supply
- Systems in range
- 14Across 5 roof types
- Structural alloy
- AL 6063-T6Virgin aluminium, extruded in-house
- Fastening
- SS 304 / SS 316All exposed fasteners stainless
- Design wind speed
- up to 55 m/s198 km/h · to IS 875 (Part 3)
- Structural verification
- STAAD Pro + FEAReports certified by chartered engineers
- System weight
- ≈ 10 kg / kWStructure only, typical
- Installation rate
- 4–5 kW / man-hourTypical, mini-rail systems
- Workmanship warranty
- 5 yearsFrom date of supply
RPK Green manufactures for trapezoidal metal sheet roofs, standing-seam roofs, Klip-Lok concealed-fix
roofs, Kalzip aluminium roofs and flat RCC concrete roofs. Systems are supplied for arrays from a single
kilowatt to multi-megawatt commercial and industrial rooftops. The largest single rooftop project
reconciled against the specifications on this page is 6,047.48 kW.
Beyond rooftops, RPK Green designed, manufactured and supplied the mounting structures for
Healthway — India's first solar roof cycling track, a 16 MW solar canopy running 23 km along
the Hyderabad Outer Ring Road.
03Full specification table
All fourteen systems, directly comparable. Design wind speed is a 3-second gust in metres per
second; selection is always against the site's wind zone under IS 875 (Part 3), never against a
catalogue headline.
Design wind speed in km/h: 55 m/s = 198 km/h · 50 m/s = 180 km/h · 47 m/s = 169 km/h.
Structural verification
Every system in this range is analysed in STAAD Pro and by finite element analysis,
and the resulting reports are certified by chartered engineers. Structures are designed with
chartered engineers in SolidWorks, and each one is analysed for wind stability before it is released
for manufacture.
Project-specific reports are issued against the site's own wind zone under IS 875 (Part 3), so a
consultant reviewing the array is checking our figures for that roof rather than a generic catalogue
rating. Ask for the report with the quotation.
04System specifications in detail
Each system below lists its own verified figures and the executed project its bill of
material has been reconciled against.
Trapezoidal metal sheet roofs
ECO70 Cup RailRPK-ECO70Trapezoidal sheet
Adhesive cup rail — the flagship. Zero roof penetration.
- Roof type
- Trapezoidal sheet
- Module orientation
- Landscape
- Fixing method
- Structural adhesive
- Tilt
- Flush to roof
- Section
- 70 H × 120 L mm
- Design wind speed
- 55 m/s · 198 km/h
- Alloy
- AL 6063-T6
- Rail nut
- RPK-E70-NUT 4.5/25
- Nothing pierces the sheet. Bonded with a 24 mm structural adhesive bead on one face. The roof sheet is never drilled, so the sheet manufacturer's roof warranty stays intact and there is no leak path to seal or maintain.
- Lowest aluminium per module. This is the lightest way to carry a module on a trapezoidal roof — the reason it wins on large tenders.
- Landscape mounting. Two rail lines per row; rails land on the sheet crowns, so there is no purlin hunting and no structural roof survey needed.
Reconciled against6,047.48 kW · 9,754 modules · 1,771 rows · SunGreen Power
A100 Cup Rail 100HRPK-A100Trapezoidal sheet
Adhesive cup rail at 100 mm height — more clearance, more airflow.
- Roof type
- Trapezoidal sheet
- Module orientation
- Landscape
- Fixing method
- Structural adhesive
- Tilt
- Flush to roof
- Section
- 100 H × 120 L mm
- Design wind speed
- 55 m/s · 198 km/h
- Alloy
- AL 6063-T6
- Rail nut
- RPK-E70-NUT 4.5/25
- 100 mm standoff. The extra 30 mm over ECO70 lifts the module clear of deep ribs and improves under-module airflow — cooler cells and better yield in Indian summer conditions.
- Same adhesive method. Single-side 24 mm bead. Non-penetrative, so it suits leased roofs and warranty-sensitive sheds.
Reconciled against6,300.44 kW project sheet
ECO100F Cup Rail 100HRPK-ECO100FTrapezoidal sheet
Rivet or adhesive — the fixing is chosen on site.
- Roof type
- Trapezoidal sheet
- Module orientation
- Landscape
- Fixing method
- Rivet or adhesive
- Tilt
- Flush to roof
- Section
- 100 H × 120 L mm
- Design wind speed
- 55 m/s · 198 km/h
- Alloy
- AL 6063-T6
- Rail nut
- RPK-RN-425 Flat 4.25/30
- Two fixings, one part. Rivet through the crown with 4 aluminium pop rivets and 4 EPDM washers, or bond with a two-sided adhesive bead. One SKU covers both roof conditions.
- Heaviest section in the cup range. The stiffest 100 mm cup rail we make, for high wind zones and thicker sheets.
- Sealed rivet detail. Every rivet is set through an EPDM washer, so the penetration is gasketed rather than sealant-dependent.
Reconciled against300.00 kW · Newzen Green Energy
FOR100 Mini RailRPK-FOR100Trapezoidal sheet
300 mm portrait mini rail — spans the ribs, spreads the load.
- Roof type
- Trapezoidal sheet
- Module orientation
- Portrait
- Fixing method
- Rivet or adhesive
- Tilt
- Flush to roof
- Section
- 100 H × 300 L mm
- Design wind speed
- 55 m/s · 198 km/h
- Alloy
- AL 6063-T6
- Rail nut
- RPK-RN-425 T-Nut 4.25/30
- 300 mm footprint. The long base bridges two or three sheet ribs, so wind uplift is shared across the roof rather than concentrated at a single crown.
- Portrait mounting. Suits portrait module layouts and reverse-tilt conversions without changing the bracket.
- Rivet or adhesive. Four pop rivets with EPDM washers per rail as standard; a metered 7 ml adhesive dab is the non-penetrative alternative.
Reconciled against515.22 kW · ARM Renewables
MOR68 Mini Rail 68HRPK-MOR68Trapezoidal sheet
The light mini rail — same 300 mm span, less metal.
- Roof type
- Trapezoidal sheet
- Module orientation
- Portrait
- Fixing method
- Rivet or adhesive
- Tilt
- Flush to roof
- Section
- 68 H × 300 L mm
- Design wind speed
- 55 m/s · 198 km/h
- Alloy
- AL 6063-T6
- Rail nut
- RPK-FNR-30 Flat 30 mm
- Lightest 300 mm bracket. The same 300 mm load spread as FOR100 for materially less aluminium.
- Shallow 68 mm profile. Keeps the array low to the roof, which matters where wind loading outweighs airflow.
Reconciled against1,184.20 kW · Solluz Energy
ECO95B RailRPK-ECO95BTrapezoidal sheet
The all-rounder — 95 mm, landscape, rivet or adhesive.
- Roof type
- Trapezoidal sheet
- Module orientation
- Landscape
- Fixing method
- Rivet or adhesive
- Tilt
- Flush to roof
- Section
- 95 H × 120 L mm
- Design wind speed
- 55 m/s · 198 km/h
- Alloy
- AL 6063-T6
- Rail nut
- RPK-RN-425 4.25/30
- Double-sided adhesive bead. When bonded, ECO95B takes a 24 mm bead on both faces — twice the bonded area of a single-sided cup rail.
- Or riveted. Four aluminium pop rivets with EPDM washers where the roof owner permits penetration.
- Balanced section. At 95 mm it sits between ECO70 and the 100 mm rails — the default choice when the roof specification is unremarkable.
Reconciled againstNations Pride project set
ECO30 Long RailRPK-ECO30Trapezoidal, purlin-fixed
Purlin-mounted continuous rail — for roofs that must be structurally fixed.
- Roof type
- Trapezoidal sheet
- Module orientation
- Landscape
- Fixing method
- Self-drilling screw to purlin
- Tilt
- Flush to roof
- Section
- 30 mm H · cut to length
- Stock cut lengths
- 4.8 / 4.2 / 2.8 / 2.6 / 1.6 m
- Design wind speed
- 55 m/s · 198 km/h
- Alloy
- AL 6063-T6
- Rail nut
- RPK-RN-425 4.25/30
- Load goes into the purlin, not the sheet. L or U cleats are screwed to the structural purlin below, so uplift is carried by the building frame. This is the specification of choice for cyclone-prone coastal sites.
- Cut-length optimised. Longer runs are preferred so fewer jointers are used. 4.8 m is the standard maximum cut; 5.0 m is released only on projects above 1 MW.
- Continuous support. Two rail lines per row give the module a continuous bearing rather than four point loads — the gentlest option for thin-frame modules.
Reconciled against1,404.72 kW · 1,951 modules · 545 rows · Solluz Energy
Standing seam, Klip-Lok and Kalzip roofs
SSB100 Standing Seam BracketRPK-SSB100Standing seam
Two-part seam bracket — grips the seam, never the sheet.
- Roof type
- Standing seam
- Module orientation
- Landscape
- Fixing method
- Seam clamp, non-penetrative
- Tilt
- Flush to roof
- Section
- 100 H × 100 L mm
- Design wind speed
- 55 m/s · 198 km/h
- Alloy
- AL 6063-T6
- Assembly
- SSB100-A + SSB100-B, 2 × M8×25
- Truly non-penetrative. The bracket closes onto the standing seam and clamps it. No hole, no sealant, no leak path — and the roof sheet manufacturer's warranty survives.
- Two-section body. SSB100-A and SSB100-B are joined by two M8×25 hex bolts, so clamping force is set by torque rather than by press fit.
- Removable. The array can be released and the roof handed back unmarked, which matters on leased and rented sheds.
Reconciled againstType 1 Fix project set
SSB55 Standing Seam Bracket 55HRPK-SSB55Standing seam
Single-profile seam clamp with grub screws — fewer parts, faster install.
- Roof type
- Standing seam
- Module orientation
- Landscape
- Fixing method
- Grub-screw seam clamp
- Tilt
- Flush to roof
- Section
- 55 H × 100 L mm
- Design wind speed
- 55 m/s · 198 km/h
- Alloy
- AL 6063-T6
- Seam grip
- 2 × M8×30 grub screw, SS 304
- One piece, not two. A single 55 mm extrusion replaces the A+B assembly — no interconnect bolts to torque, so the install is quicker per bracket.
- Grub-screw grip. Two M8×30 grub screws bear directly on the seam. Torque is set once and is checkable on site.
- Low profile. 55 mm keeps the array tight to the roof line — useful where the array is visible or wind-exposed.
Reconciled against350.00 kW · 1,340 brackets · ARM Renewables
Klip-Lok ClampRPK-KLIPKlip-Lok concealed fix
Grips the Klip-Lok rib itself — nothing enters the sheet.
- Roof type
- Klip-Lok concealed fix
- Module orientation
- Landscape
- Fixing method
- Klip-Lok rib clamp
- Tilt
- Flush to roof
- Section
- 70 H × 105 L mm
- Design wind speed
- 50 m/s · 180 km/h
- Alloy
- AL 6063-T6
- Rail nut
- RPK-KLIP-NUT
- Made for the rib, not adapted to it. The clamp jaw is cut to the Klip-Lok rib geometry. A generic clamp forced onto a concealed-fix rib will deform it.
- Two clamps per bracket. Grip is shared across two contacts, so the rib is not point-loaded.
- Heaviest section in the range. Concealed-fix roofs carry uplift through the rib, so the bracket has to be stiff.
Reconciled against667.70 kW · Sun360
Kalzip ClampRPK-KALZIPKalzip aluminium seam
Matched to Kalzip seam geometry — aluminium on aluminium.
- Roof type
- Kalzip aluminium seam
- Module orientation
- Landscape
- Fixing method
- Kalzip seam clamp
- Tilt
- Flush to roof
- Section
- 100 H × 104 L mm
- Design wind speed
- 55 m/s · 198 km/h
- Alloy
- AL 6063-T6
- Rail nut
- RPK-KLZ-NUT
- No dissimilar-metal contact. An aluminium bracket on an aluminium roof avoids the galvanic pairing that shortens the life of steel clamps on Kalzip.
- Purpose-cut jaw. The clamp profile follows the Kalzip seam — grip comes from geometry, not from over-torquing.
- Two clamps per bracket. Load is split across two seam contacts per bracket.
Reconciled against667.70 kW · Sun360
Flat RCC concrete roofs
Flatfix 1P RCC Ballast FrameRPK-FF1PRCC flat roof
Single-portrait tilt frame for concrete roofs — no drilling into the slab.
- Roof type
- RCC flat roof
- Module orientation
- Portrait, one per frame
- Fixing method
- PCC ballast blocks + GI anchors
- Tilt
- Fixed 10° / 12° / 15°
- Design wind speed
- 55 m/s · 198 km/h
- Alloy
- AL 6063-T6
- Clamping
- C-type end + butterfly mid
- Anchor bolts — RPK supply
- GI M8×100, 6 per leg (4 rear, 2 front)
- Ballast — site scope
- 2 × PCC block 300 × 300 mm per structure
- Waterproofing stays untouched. The frame stands on PCC ballast blocks. Nothing is drilled through the slab membrane, which is where flat-roof solar most often goes wrong.
- Three tilt angles. 10°, 12° and 15° leg geometries, each a distinct cut set — not a bent-to-fit approximation.
- One module per frame. Single portrait frames follow an irregular roof, step around obstructions, and can be re-laid without disturbing neighbouring frames.
- Anchor bolts included. GI M8×100 anchor bolts are supplied by RPK — 6 per leg as standard, 4 per leg where the design allows. Only the PCC ballast blocks are site scope, and our quotations state that on the face of the document rather than in a footnote.
Reconciled against400.50 kW · EnerParc Energy · 10° tilt
Reverse-tilt systems for wrong-facing roof planes
Angle Mount N-SRPK-ANG-NSReverse tilt, north–south
Turns a north-facing metal roof into a south-facing array.
- Roof type
- Trapezoidal sheet
- Module orientation
- Portrait
- Fixing method
- Rivet, 6 per leg
- Tilt
- Reverse tilt 5–15°
- Design wind speed
- 47 m/s · 169 km/h
- Alloy
- AL 6063-T6
- Leg assembly
- Strut-braced triangle, 3 × 300 mm strut
- Recovers a wasted roof. A north-sloping roof plane generates poorly. The reverse-tilt leg lifts the module back to a south-facing 5–15° and recovers most of that lost yield.
- Strut-braced triangle. Leg plus three 300 mm strut rails. The triangle is a fabricated assembly, not a single bent length — so the angle is a cut geometry, not a site guess.
- Six sealed rivets per leg. Each leg is riveted with six aluminium rivets over EPDM washers.
Reconciled against146.88 kW · Solluz Energy
Angle Mount E-WRPK-ANG-EWReverse tilt, east–west
Strut-free leg on a 400 mm twin foot — for east–west roof slopes.
- Roof type
- Trapezoidal sheet
- Module orientation
- Portrait
- Fixing method
- Rivet, 8 per leg
- Tilt
- Reverse tilt 5–15°
- Design wind speed
- 47 m/s · 169 km/h
- Alloy
- AL 6063-T6
- Leg assembly
- Twin 400 mm foot, no strut
- No strut to install. The two 400 mm feet give the leg its own stability, so the strut rail and its fasteners disappear from the bill of material and from the install sequence.
- Wider base, heavier leg. The metal moves from the strut into the foot.
- Eight sealed rivets per leg. More rivets because the foot, not a strut, resists the overturning moment.
Reconciled against400.02 kW · Solluz Energy
05Aluminium safety handrails
Rooftop edge protection for the same roofs we mount on. A solar array puts people on a
roof for the next twenty-five years — for cleaning, for inspection, for string testing. The handrail
is what makes that roof legally and practically workable, and it is supplied and fitted by the same
people who set out the array.
RPK Aluminium HandrailRPK-HRAll metal roof types
Modular high-strength aluminium handrail for solar rooftops and elevated platforms.
- Roof types
- Trapezoidal · Standing seam · Kalzip · Klip-Lok
- Material
- High-strength aluminium
- System
- Vertical post · coupler · supporter
- Height
- To client requirement
- Construction
- Modular, bolted — no site welding
- Fastening
- Stainless steel 304 / 316
- Fits every metal roof we mount on. Trapezoidal sheet, standing seam, Kalzip and Klip-Lok. The handrail attaches by the same principle as the mounting system beneath it, so a non-penetrative array does not end up with a penetrative handrail bolted through the sheet beside it.
- Aluminium, not galvanised steel. On a roof that already carries an aluminium array, an aluminium handrail avoids the dissimilar-metal pairing and does not stain the sheet as a coating fails.
- Three-part modular system. Vertical post, coupler and supporter. Runs are assembled and adjusted on site with hand tools — nothing is welded on the roof, and a run can be extended or re-set later.
- Height to requirement. Set against the site's own safety specification rather than a fixed catalogue height.
- Quoted with the array. Supplied on the same bill of material as the mounting structure, so edge protection is priced at tender stage rather than discovered afterwards.
Also supplied for rooftop access and cable management:
FRP walkway in 3,660 mm sections, 12–30 mm thickness, with stainless steel mounting clamps;
and GI cable tray in 1.2–2.0 mm gauge, made to the project's own sizes.
07Bill-of-material formulas
These are the formulas we quote from. They are published here so an EPC can check a
quotation line by line, or estimate a bill of material before asking us for one.
M = number of modules · R = number of rows · n = modules in a row ·
w = module width in metres.
Where the supply boundary sits. GI M8×100 anchor bolts are RPK supply and are priced
as a line on the quotation. PCC ballast blocks, roof-side civil work, module supply and electrical
balance of system are site scope on every project. Either way the boundary is stated on the face of
our quotations rather than in a footnote.
