Hi hihihihihi I've been talking about solar panels with my parents and they said that u cant slap them on any surface bc if they get too hot (from being in the sun too long) then they cease to function until cooled off . I'm just wondering if this is true? Also I live in a very hot place little to no rain and a very harsh sun. It would make sense to build solar farms around here but by my parents info it isnt??? Lov ur blog btw 💕
There is some truth in this, unfortunately, as solar panel efficiency does start to fall if temperatures get too high. But it’s not quite as bad as your parents think. After all, the world’s largest solar farm is in Egypt.
So the thing about solar cells is that they work because they’re made from semiconductors – traditionally based on silicon – and the thing about semiconductors is that they’re affected by temperature. The oversimplified explanation is that at higher temperatures, those semiconductors become more conductive, which interferes with the way they work.
(The more technical and physicsy explanation involves photons being absorbed by the semiconductor, which excites electrons from the valence band into the conduction band – you can read more about that here, if you like.)
Anyway. Modern solar panels don’t cease to function, but when they’re too hot, they won’t work as well. Their ideal temperature is somewhere around 25°C (77°F), but because they’re dark in colour they can reach temperatures of around 65°C (149°F) when in sunlight. From what you say, I suspect this may affect solar panels where you live. There are ways to counteract that effect though. The simplest is to install the panels mounted slightly above a surface to allow airflow. That would help. I’m sure there must be other tricks which can be used too.
Wind farms are another option, of course.
One thing which I don’t see very much of is the idea of using heat engines. Stirling engines, for instance, convert heat into mechanical energy and are more efficient than internal combustion engines. There are also thermoelectric generators which can convert heat directly into electric current (they even work in roughly the same way as solar cells).
Anyway, I’m rambling now. Hope this gives you some things to think about. And thanks! 😊☀️