Large temperature differences cause metals to expand and contract.

This is exactly what happens on roofs and particularly affects the rails of the mounting system. Since the coefficient of linear expansion for aluminum is quite large, high stresses can occur over long lengths of rail. The solution is simple: avoid long stretches.

With our practical software K2 Base, the design of PV projects is planned quickly and easily. Once the roof has been drawn and the module orientation has been determined, the details can be quickly worked out. This is where thermal separation comes into play. A maximum length is defined for all K2 systems, after which a thermal separation must be set. These are automatically applied during planning in K2 Base. Experienced users know: With our planning software, the module fields can be divided both vertically and horizontally as required for the selected roof area. This creates a separation between the rails that allows for thermal expansion of the material while minimizing stresses. It also creates practical maintenance walkways where installers can comfortably walk on the roof.

In the latest version of K2 Base, thermal separations have been further optimized. The module fields are now distributed symmetrically. On flat roofs, the resulting uniform block sizes ensure even ballast distribution and a reduction in total ballast. It is also possible to individually define whether to count from the right or left /from above or below.

This makes planning the PV installation even faster and more convenient.

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