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France's Power Prices Jump 22% as Heatwave Trims Nuclear Output (oilprice.com)
submitted 2 days ago by to c/europe@feddit.org
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[+] -7 points 2 days ago* (2 children)

Not so funny thing is that the solar power (at least panels as far as I know) doesn't work well either if the weather is really hot.

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  • [–] 24 points 2 days ago

    They lose a bit in efficiency, yes. On the other hand there is usually not much of a cloudy weather when it's that hot either. Solar panels still work more efficiently and deliver more electricity under these conditions than most other forms of power generation.

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  • [–] 16 points 2 days ago (1 child)

    This is borderline fake news - I can confirm that the system on my roof worked during the heatwaves without any problem.

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  • [–] -3 points 2 days ago (2 children)

    So no problems with efficiency and coating still not starting to degrade and electronics survived it well? What do you consider heatwave? If your system records the temperature / panel inner temperature and production data it would be interesting to see. I'm especially interested in the data from france and spain in the times of extreme heat (close to when the fires happened).

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  • [–] 7 points 2 days ago (1 child)

    A quick google will tell you what it means… 0,3-0,5% efficiency reduction per 1°C over 25°C panel temperature.

    That equates to 10% less power output when the panels are at 60°C for example.

    Source: https://8msolar.com/solar-panel-efficiency-vs-temperature/

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  • [–] 1 point 1 day ago (1 child)

    As you clearly have some idea let me ask what do you think will happen when nuclear is out and outside temperature is closer to 45°C than 40°C.

    I'm not familiar with commercial solar panels. Do those need cooling? Residental probably don't have it anyway?

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  • [–] 1 point 1 day ago* (last edited 1 day ago)

    Well as you can see from the numbers, a 5 degree increase in temperature would mean a 2,5% decrease in output.

    As far as I know, the modules are usually not cooled. There are however modules with integrated water cooling, which can also be used to generate heat output which you can turn into energy.

    But this is only for photovoltaic modules. There is other types of solar energy, for example molten salt.

    /edit: to clearly answer your question: it doesn’t matter that much to solar power in general.

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  • [–] 2 points 1 day ago (1 child)

    South of Germany here. We had temperatures up to 40°C and the system on the roof did fine. You can also see stats about german energy production here, there is no broad failures on hot days

    https://energy-charts.info/?l=de&c=DE

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  • [–] 1 point 1 day ago* (last edited 1 day ago)

    Is there a way to export the actual data from there and is it possible to see different devices and stations? I tried to find a way to get the production data to a chart with the temperature data but it just has some pdf files I'm not ready to start parsing for single time use.

    Btw. Isn't 40 Celsius just the beginning of the extreme heat / weather cycle?

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