DESERT® & TROPIC® Technology: High Temperature Resistance

Annual Average Temperature

High ambient temperature

In the Sun Belt regions, the high irradiation leads to a high ambient temperature, and therewith a high module temperature. Due to an intrinsic property of the silicon, the module power decreases linearly with increasing temperature, which is a well known fact in the PV industry. The parameter that describes this behaviour is the so- called temperature coefficient. The J.v.G. Thoma DESERT cell has a very low temperature coefficient compared to standard solar cells.

Another approach how to meet the problem of decreasing power at higher temperatures is the cooling of PV modules. Here J.v.G. Thoma offers a DESERT Hybrid module.

High temperature change

Besides the high ambient temperature, another challenge in regions with extreme climates are the high temperatures changes. In desert or tropical locations, temperature gradients of up to 40°C between day and night occur quite frequently. As a PV module consists of materials with different mechanical behaviours, the high temperature gradients lead to thermomechanical stresses inside the module. Especially the cell connectors are thereby weakened. Using of pretreated and non-crimped connectors or using half-cells can reduce cell connector breaks.
 

High temperature change

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