LID and degradation

[Sun18251878026]

Solarworld is claiming in the warranty that the degradation of the module in year 1 will be guaranteed to stay above 97% and then they guarantee an annual degradation of 0.7% there after.

Does this include LID (light induced degradation) in the numbers?

In PYSYST there are separate tabs for LID and for Module Degradation. Should I use 3% in year 1 and 0.7% thereafter under the "Degradation" Tab, and assume this includes LID????

Or do I need to include a LID of 2% on top of the 3% in year 1 and 0.7% thereafter???

My gut tells me that I have to include both, but I don't want to double stack degradation and misrepresent the losses.......HELP PLEASE

[André Mermoud]

The manufacturer's ageing values are a warranty, i.e. a worst case value for one (each) module.

The definitions for the degradation concern the whole system, i.e. an average of all modules. This is not the same thing.

Please see our FAQ How to interpret the warranty efficiency curve of the manufacturers ?