Solarpunk technology

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Goodbye to the idea that solar panels “die” after 25 years. A new study says the warranty does not mark the end, and real-world performance can last for decades (www.ecoticias.com)

submitted 1 month ago by poVoq@slrpnk.net to c/technology@slrpnk.net

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[–] aeronmelon@lemmy.world 8 points 1 month ago* (last edited 1 month ago) (2 children)

Many Japanese homes are still using solar water heaters that were installed in the 1980s. They’re very inefficient now, but they still work if you take care of them.

[–] acockworkorange@mander.xyz 18 points 1 month ago

That's an entirely different technology. A solar water heater is essentially a specialized greenhouse with tubes and no moving parts. You just need go clean them every one to 4 years.

[–] cogman@lemmy.world 6 points 1 month ago (1 children)

Oh no. Water heaters are the most efficient form of solar. Newer solar water heaters might be a bit more efficient than old systems, but we are talking like 80->90%. PVC solar peaks in the 20% range.

[–] gandalf_der_12te@discuss.tchncs.de 2 points 1 month ago (1 children)

20% of a looot of energy is still a lot though

[–] cogman@lemmy.world 1 points 1 month ago

What's funny is it's enough energy that a heat pump water heater + solar ends up being more efficient than a solar water heater. Especially in a warm environment.