PV degradation?

[kepler]

From the little i could find, the power output reduction over time is all seen in the voltage output from the panels. Can anyone verify? If so, it sounds like a 72cell panels higher beginning voltage ~37 will be helpful to stay above the full battery charge voltage plus other system voltage drop (maybe total ~29.5) when looking at long term use versus 60cell ~31v.

Just looking for other feedback, thanks

[Dacian Todea]

PV cells are basically diodes and voltage only fluctuates with temperature thus aging panels will have reduced current output. Open circuit voltage will remain the same over the life of the panel and is only affected by temperature.

Here is a bit more technical research paper and read the Abstract at page 1  https://www.nrel.gov/docs/fy12osti/53713.pdf

Most panels with few exception's only degraded around 0.2% per year that is just 5% in 25 years.

You can have new panels with 5% tolerance so I will not worry about degradation as it is almost non existent with quality panels.

[kepler]

Thanks for the link, missed that one.