EARLY SIGNAL
A few builders are circling. It's early but alive.
7 public repos have tried something like this, the strongest has 22 stars, 3 Hacker News posts in the last 12 months, 29% of those repos were started in the last six months.
Rooftop solar co-ops that pay members back in kWh, not paperwork.
Milestones and traction are captured by AngelRun — not self-claimed.
AngelRun never handles funds or processes any investment.
We surface what founders have done. We never recommend investments.
Rooftop solar co-ops that pay members back in kWh, not paperwork.
Second-city pilot is open. Also: started a first conversation with a hardware partner about co-designing the next metering unit. Early, but the shape is there.
Tainan cohort signed a letter of intent.
Tainan cohort signed a letter of intent for the second-city pilot. Different grid operator, so interconnect is a fresh fight — but demand travels.
Cumulative across the pilot co-op.
Crossed 1,000,000 cumulative kWh tracked. Number goes up, but the thing I care about is that zero members have asked 'where did my credit go' this month. The accounting is holding.
First co-op is officially live in Taichung — 12 households on one array. Local paper picked it up. The founders of the building association are now our loudest advocates.
12 households, one shared rooftop array.
Hard week. Our metering integration broke twice and a co-op member churned. Wrote down exactly what failed so it can't happen at the next site.
MVP is live for the pilot group. Every member can open the app and see which kWh came off their own panels vs the shared array. Watching someone see their first credit land is the whole job.
Members see exactly which kWh came from their panels.
Ran the demand survey properly this time. 40 owners, structured questions. The wedge is real: people don't distrust solar, they distrust the paperwork. That's the thing we're actually killing.
Door-to-door + survey across two Taichung districts.
Week 1. Knocked on 40 doors in Beitun. The pitch that landed: 'your roof already makes power — we just make sure you get paid for every watt of it.' 31 said tell me more.
EARLY SIGNAL
7 public repos have tried something like this, the strongest has 22 stars, 3 Hacker News posts in the last 12 months, 29% of those repos were started in the last six months.
Amber checkmarks are platform-verified; paper checkmarks are founder-reported.
Top climbers get a chance to talk to AngelRun’s angels — selection is at AngelRun’s discretion.
Build a blockchain-based kWh credit settlement layer specifically for existing community solar operators (like Sunrun's community programs) rather than starting from scratch—the yh-sh/EnergyManagement repo shows demand for cooperative energy tracking, but zero HN discussion on 'solar kwh credits' indicates no one has solved transparent, auditable settlement yet.
Focus on multi-building energy arbitrage within commercial real estate portfolios instead of residential rooftops—Exampl33/Sovereign-Wealth-US hints at community labor models, and the 3 HN posts on 'rooftop solar pool' suggest residential is saturated, but there's no competitor addressing B2B solar credit trading between office parks and warehouses.
Create a compliance-first accounting dashboard for existing solar co-ops to meet state renewable energy credit (REC) reporting requirements—the Mario-Kart-Felix/solar-wind-hacker-book's focus on security and the 22-star count shows infrastructure concerns matter, but zero HN posts on 'solar cooperative accounting' reveals no one is solving the regulatory audit trail problem that prevents co-ops from scaling.