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PV-ezRack FAQ


How do I mount my panel landscape on a tile roof?

If you want your rails to run from the gutter to the top of the roof and have your panels installed landscape, you just need to use our “ER-I-23”, landscape tile interface.



My roof is facing east west, how can I tilt my panels to the north?

To tilt the panels to the north on an East or West facing tin roof, we suggest running a MT rail from top to bottom, fixing it to the rafters. Then just mount the tilt legs to the MT rails using diamond modules and bolts. Alternatively you can use (if the required spacing or less can be applied) the corrugated adapter and fix the adjustable tilt legs on top of them.

MT-Rail (ER-R-MT)

Corrugated adapter (ER-AD-C110)



Example: East/West Roof




I would like to extend my installation on my South facing roof, do you have a solution?

To do that you just need to use our adjustable tilt legs 30 to 60 degree. This will allow you to tilt the panels to the north.



I need to install some tilt legs on a Klip Lok (Ultra Deck) roof. There is no screw to help me located the purlins, how should I mount them to the roof?

You just need to use our Klip Lok (non-penetration)  interface. This interface just clips on the top of the klip lok and doesn’t need any penetration. Then just fix the tilt legs in the mounting holes.




I would like to install the panels very close to the edges and ridges of the roof, which spacing should I use?

When you install very close to the roof edges and ridges, the wind load applied to the panels are bigger. So you need to reduce the spacing. In the installation guide, you need to follow the spacing for “up wind, down wind”.


What interface do I use for a slate roof, do you have tile bracket to use on this roof?

Yes we do. The product code is ER-I-04.



I am using thin film frameless module, do you have a solution to mount them to the roof?

SolarRoof is also available for thin film frameless panels. You can have a look to this product on our website or on the catalogue.


I would like to use as many roof space as possible, how should I calculate the spacing between my rows to avoid shadow?

Clenergy has designed a calculator to help you determine the minimum spacing require between the rows when using our adjustable tilt legs our SolarTerrace products.


I need to install some tiles interface on metal rafters? What should I do?

You just need to make sure than the metal is more than 1mm thick. However make sure you use screw with at least 14TPI (thread up to the head) or RoofZip.


What is portrait and landscape?

This refers to the module orientation. In a portrait orientation the longest dimension of the modules is mounted north-south (vertically). In a landscape orientation the longest dimension of the modules is mounted east-west (horizontally).


What is the best tilt for my location?

In short, this depends on your latitude installation site.  In general, year-round loads require a tilt angle equivalent to the latitude, winter loads equivalent to latitude plus 15 degrees, and summer loads equivalent to latitude minus 15 degrees.


How do I determine the wind load?

Australia is split in 4 different wind regions named A, B, C and D. You can find the wind map our installation guide or calculator.


Why do you have 2 different spacing for 2 different areas on the roof?

When you install very close to the roof edges and ridges (up-wind, downwind), the wind load applied to the panels are bigger. In fact, the wind blowing against the wall is then going up directly on the panels. So you need to reduce the spacing. That’s why there is two different spacing for the two different areas on the roof.


What solution do you offer to ground/earth the panels?

See PV-ezRack grounding lugs and clamps under accessories.


How far can your rails span between attachments?

The span depends on the interface you use, the wind region, the height of the building and the area on the roof where you plan to install.

You can find the relevant summary tables in our installation manual.


Quality, Certification and Accreditation

What is the anodizing on the rails? I am worried because I am installing close to the sea.

Clenergy PV-ezRack rails come with a 10 microns anodizing as a standard. The aluminum we use AL6005-T5. If you want a thicker anodizing please contact us.


What are the material and the grade that you use for the tile interface?

All our tile interfaces are in Stainless steel SUS304 with a sand blasting finish.


Is your product accredited in Australia?

SolarRoof is accredited, based on the latest AS/NZS1170, for Australia up to region D. In other terms, you can install SolarRoof everywhere in Australia, following our installation guide. If you require a copy of the accreditation letter feel free to contact us.

What is standard warranty on your racking system?

Every Clenergy racking system (PV-ezRack) comes with a standard 10 years warranty.


Are you included on “the deemed to comply” to be used in Northern Territory?



Is SolarRoof accredited for other countries?

Clenergy has sold products to over 17 countries. SolarRoof is accredited to be used in Europe, USA, Australia, China, Japan and many more.


What type of certification and testing Clenergy SolarRoof has?

Clenergy PV-ezRack SolarRoof has been accredited for Australia based on the latest AS1170.2.  It has also been tested by TUV and RAL in Germany.


Logistic and Ordering

What size of clamps do you have?

Clenergy offers a full range of clamps for every size of panels. 28, 30,

32, 35, 38, 40, 42, 46, 48, 50, 57 mm clamps are in stock in Australia.


Are your kits of interface including the screws?

Yes, all the Clenergy interfaces kits include screws that you can use when installing the products.


What is the typical lead time?

Clenergy hold around 10MW of racking system in Melbourne. We can deliver all around Australia within a week.


How much will shipping cost?

The cost of shipping depends on the size of the order, and where it’s shipped to.


How do I buy your racking systems?

Clenergy is the manufacturer and importer of the products. If you want to buy our products you will have to contact one of our distributors. Clenergy partners with high quality distributors all around Australia. To know your closest distributor, contact our office.


How are the parts of Clenergy’s SolarRoof products packed?

As we are the manufacturer, we don’t sell the product as a 1.5 or 2 kW. All our products are sold by pack. The clamps come in pack of 100, the interface 12 (for tile) and 40 for tin. All our cartons and packs are labeled with the product code and description of the pack.

The rails are always sold by pair.


What kind of information do you need to be bale quote me for a customized solution or a project?

If you need assistance with a special project, Clenergy can help you in the design. We will need some information about the location of the project, the layout of the roof and size of the panels you want to use. Our Calculator might help you as well to determine the bill of material.


Can I buy your product directly from China?

Clenergy offers a FOB option for our major partners. Please contact your sales representative for more information.


Tile roof: What should I do if the wood of the rafter is a hard wood and the screws would split it?

You need to use 2 screws (6x80mm) minimum going in to the rafter. If necessary pre-drill the rafter with a 4mm drill.  


ezRack end clamp function

The end clamps need to be tilted in order to grab down the edge of the panel or be maximum at 90 degrees. The lip must be always against the rail, and can’t hang over, otherwise it doesn’t have enough strength to hold down the panels.


Mounting on Klip Lok roofs with penetration.

You can use the MT-Rail on Klip Lok or similar roofs as a base rail. To mount the MT-rail use the same amount of screws attached to Diamond Modules as you would normally use for the interface kits if you were to mount these directly to the roof.

MT-Rail and tilt kit.JPG



Is the atmosphere near the sea considered to be corrosive?

The warranty for ezRack Solar Roof products includes the condition:

All installations in corrosive atmospheric conditions are excluded.”

The atmosphere near the sea is not considered to be corrosive for the purposes of this warranty.



Galvanic corrosion

Galvanic corrosion appears btw two different materials with different electrode /galvanic potentials.


Connection btw TL30 and corrugated roof

Zink plated steel (roofing sheets) and stainless steel are different materials with the same potentials therefore there is no need for rubber pads


Connection btw ER-I-05 and corrugated roof

In this case we have different materials with different potentials therefore rubber pads are required


Connection btw ER-I-01 and anodised ezRack rail.

Here we have different materials but simiral galvanic potential, therefore no rubber pads needed




Installation times

Installation times for 2 workers for a 1,5 kW system (just racking and panels)

Tile roof:


Tin roof L-feet:


Tin roof tilt legs:







Rust on stainless steel

Stainless does not "rust" as you think of regular steel rusting with a red oxide on the surface that flakes off. If you see red rust it is probably due to some iron particles that have contaminated the surface of the stainless steel and it is these iron particles that are rusting. Look at the source of the rusting and see if you can remove it from the surface. If the iron is embedded in the surface, you can try a solution of 10% nitric and 2% hydrofluoric acid at room temperature or slightly heated. Wash area well with lots of water after use. Commercially available "pickling paste" can also be used.

Quoted from





Minimum thread per inch of screws for wood and for metal purlins

For wood purlins/rafters the screws must have at least 10 threads per inch

For steel purlins/rafters the screws must have at least 14 threads per inch (or Roof zip)


Maximum and recommended torque of the M8 bolts (clamps, Z-modules)

The recommended torque on our bolts is 15-20Nm

The maximum torque is 25Nm



If tilt legs need to be installed in the valley of the profile what can installer use to seal to make the system waterproof?

Installers can use Silicon however Sikaflex is recommended which is more durable


Should I reduce the spacing if I install on a top of the hill

The Topographical Multiplier in AS/NZS1170.2 (Mt) is mostly relevant for sites in New Zealand and Tasmania over 500m above sea level. Mt is taken as 1.0 in most places in Australia. The code states for sites where the slope of the land is less than 1 in 10, Mt = 1.0. If the slope is greater than this then Mt can be calculated but you will find the multiplier effect for most site is Australia is negligible. For example, I did a quick check on the site listed below and Mt = 1.0006, which we would consider to be close enough to 1.0.