And I'm not sure how much alive things are in the Atacama (except when there is a blooming desert fenomenon.

15 years I think

This number gets lower every time I see it.

First, manufacturers typically guarantee their panels for 25 to 30 years.

Second, while we can extrapolate from existing data and perform accelerated aging tests, we're actually not completely sure how long PV panels last in the real world because the oldest ones from 1987 are still going.

fotovoltaic pannels decay with time and have to be replaced, 15 years I think?

much longer: https://www.slashgear.com/1989112/solar-panel-lifespan-longer-new-study/

The usual warranty period is 20 years generating 80% of the nameplate generating Watts

They keep generating reasonable amounts of power 50 or 100 years later, though they tend to get overtaken by new technology in 10 to 20 years, and since they pay for themselves in about 4 years in my area they get replaced while still working well

I think we export our obsolete panels to developing nations

Lies! Well the thermal plant is also fine but photovoltaics are really, really good.

https://www.youtube.com/watch?v=KtQ9nt2ZeGM

Solar panels are still cheaper and easier. Most spaceships and probes rely on them.

Not a lot of atmosphere on the moon.

Transmitting heat across distances in effectively a vacuum doesn't work too well.

Just look a the size of the radiators the ISS has to have, and they're not even sending heat anywhere in particular, that's just getting it off station