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Shading Analysis
Shading Analysis
For solar PV arrays, shading of just one cell has a disproportionate impact on energy production. It is therefore imperative that arrays are placed in shade free areas.
We carry out shading analysis remotely, using satellite images combined with photographs and dimensioned drawings provided by you.
The following video shows shading on roof-mounted solar panels at 0900, 1300 and 1700 hours through the pairs of equinoxes and solstices. Notice the progressively larger shading from vernal equinox in March and total darkness on winter solstice in December.
Ballast Design
Ballast Design
One of the ways to counter wind uplift of solar panels is by ballast in the form of concrete or other heavy blocks. In general, panels near the periphery of an array of experience higher wind uplift. In the recent past, wind tunnel tests were carried out to simulate wind loads on rooftop solar panels and results codified in ASCE 7.Â
Calculation of wind uplift and therefore ballast layout depends on several factors such as the heights of building and parapet, tilt angle of panels, distance from the edge of building etc.
Our patented system using prestressed steel cables further optimizes ballast requirement, thus reducing cost and load on the roof.
Anchorage Design
Anchorage Design
Wind load on solar panels results in shear as well as tension forces on anchors in concrete. Two major anchor systems for resisting these forces are mechanical and adhesive types. Calculations to satisfy code requirements is by no means an easy task.
We design such systems in consultation with specialist vendors, example of which is shown below:
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