New testing conducted at France's oldest PV system have shown that its solar modules can still provide performance values in line with what the manufacturers promised.
I love seeing stuff like this. Iirc, panels are given a 25 year lifespan. If most panels will last this long and longer, it would only make sense to replace/upgrade when they actually break or there is a significant enough increase in efficiency to make it worth the investment. Not unlike the batteries in evs lasting longer than even the original engineers estimated.
French association Hespul was created in 1991 to set up the first photovoltaic plant connected to the national network in France.
Following the inauguration of the Phébus 1 power plant on June 14, 1992 in Ain, Hespul decided to expand its activity to promote photovoltaics in France, which at the time was almost non-existent.
The association has now revealed that around 10 m2 of the panels, corresponding to around 1 kW, were dismantled from the system last year and submitted to a series of tests according to the international standards.
The panels were placed in a dark room at a controlled temperature and exposed to a light flash of 1000 W/m2 to measure their maximum instantaneous power.
The tests were enabled via a corporate sponsorship by the France-based certification body Certisolis and French solar specialist Isowatt, which carried out the flashing of the panels and the dismantling/reassembly, respectively .
“These results confirm those of various scientific studies referring to the subject,” continued the association, such as the TISO‐10 (TIcino SOlare) PV system, which was grid-connected in Switzerland in 1982.
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