this post was submitted on 20 Oct 2025
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solarpunk memes

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Credits for the Big Lebowski quote: https://thebiglebow.ski/ (modified to shorten the quote to the relevant text)

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[–] OwlPaste@lemmy.world 8 points 1 month ago (1 children)

I am curious, what is the rating for the install? And roughly what longitude is that? I'd love to get some for my home though a few years away to save up for it

[–] signaleleven@slrpnk.net 4 points 1 month ago (1 children)

10 kWp but ~45% of it on the northside. We're in south Germany, 49ish degrees north. We redid the roof (bought a house with resistive heating and almost no roof insulation... Picked up a bit of a project here) and covering 60% of the south side with panels is required by law (at least to get some subsidy), but we would have done anyway. Don't use this day do evaluate the project :)

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

Thanks for sharing, that's actually really cool to find out real life values. Out of interest what sort of per day values you get in different seasons?

[–] signaleleven@slrpnk.net 2 points 1 month ago (1 children)

I'll tell you when I have seasons behind me! It's a new installation :)

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

Looking forward to seeing it, I'd love to get solar and to ditch gas for a heat pump, but funds are not there 😔

one day... one day...

[–] signaleleven@slrpnk.net 1 points 1 month ago

A heat pump is also in my future, but the funds need to recover from this round of energy efficiency interventions first.

But even before then, having resistive heating might not be the best (or the cheapest) but I love to be able to measure all my house energy needs in kWh without conversions (sure if you have gas you can count cubic meters, but it's a lot of approximations).

[–] slazer2au@lemmy.world 7 points 1 month ago (2 children)

Wait a few months for that summer sun in December then things really kick off.

[–] Multiplexer@discuss.tchncs.de 9 points 1 month ago

I don't think moving a house Down Under to take advantage of that would be very efficient...

[–] signaleleven@slrpnk.net 8 points 1 month ago

I don't like walking upside down, so I stick to the top of the sphere :D

[–] Multiplexer@discuss.tchncs.de 5 points 1 month ago (1 children)

Why does it completely stop after 14:00? Even stray light through clouds should give you at least a little bit...

[–] signaleleven@slrpnk.net 9 points 1 month ago* (last edited 1 month ago)

I took the screenshot then and I was too lazy to do it again before posting :) Also, sometimes the integration that does the prediction becomes more realistic and the difference would have been less strong. But it looks like it didn't re-evaluate the prediction, and the second half of the day was even worse :)

You are correct of course, generation happens without direct sunlight. In fact, today it was raining and I never saw the sun (until literally 5 minutes before sunset, go figure). It's actually awesome to get what I get on a rainy day, jokes aside.

I can confidently say that there was no direct sunlight involved today because I have panels on the northwest side, that doesn't get any direct sunlight these days, and they behaved just like the south. Even pale sun makes the south take off way past whatever the north string can do. Didn't happen today