content: 2026-05-30 capture run — 54 finds across 18 productive sources

Ten-day gap since the 2026-05-20 sweep. Pool grows from 414 → 468 finds. Productive: Six Colors, MacStories (3), Daring Fireball (3), Brett Terpstra, Eclectic Light, Show HN (5), Wallpaper* Travel (5), AFAR (2), Boutique Homes, Cool Tools (2), Kottke.org (4), Open Culture (5), Quote Investigator (4), A.Word.A.Day, The Marginalian (4), MoMA (3), Recomendo (3), icanhazdadjoke (7). Major blocker: Reddit JSON endpoint is hard-blocked this run — all four r/* sources returned identical 189908-byte HTML payloads regardless of UA or URL pattern. Lost ~15-25 finds. Next-pass action: OAuth Reddit API. Other blockers: TidBITS 403, Web Curios ECONNREFUSED with no recent issue URL resolvable, Things Magazine still on May 15 post (monthly-ish cadence confirmed), Atlas Obscura serving evergreen 2017-era content, A Continuous Lean dormant 9 runs. 5 new source nominees in candidate-sources.md.
2026-05-31 18:30:22 -04:00
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+---
+name: "Helios"
+subtitle: "Plug-in solar potential calculator for any British address"
+date: 2026-05-30
+link: https://helios.southlondonscientific.com/
+linkText: "helios.southlondonscientific.com"
+source: "Hacker News — Show HN"
+topics:
+  - general-delight
+tags: [solar, uk, energy, browser]
+description: "Type any British address, get an estimate of how much electricity a balcony or windowsill solar panel could generate — for plug-in solar that doesn't need installer paperwork."
+---
+
+The UK recently legalised plug-in balcony solar (Germany's Steckersolar model), but the question "would it actually be worth it on my flat?" is hard to answer without roof-pitch software. Helios takes any British address and gives an estimate using historical irradiance data — output expected, payback period, recommended panel size. Free; built by South London Scientific.