# Immanuel Lam

- **Event:** [Built with Opus 4.7: a Claude Code hackathon](https://cerebralvalley.ai/e/built-with-4-7-hackathon)
- **When:** Apr 21 at 12:00 PM – Apr 27 at 2:00 AM (EDT)
- **Where:** Online
- **Team:** [Immanuel Lam](https://cerebralvalley.ai/u/immanuellam)
- **GitHub:** https://github.com/immanuel-lam/sigenergy-nem-arb
- **Demo video:** https://www.youtube.com/watch?v=pf-0i2-hWIA
- **Gallery:** https://cerebralvalley.ai/e/built-with-4-7-hackathon/hackathon/gallery
- **Page:** https://cerebralvalley.ai/e/built-with-4-7-hackathon/hackathon/gallery/53

An autonomous agent that re-plans a 64 kWh Sigenergy battery's charge/discharge schedule every 30 minutes against live AEMO wholesale prices, BOM weather forecasts, and Home Assistant sensor data. Every time the plan changes, Opus 4.7 writes a two-sentence rationale explaining what shifted and why. Backtest over 7 days of real household data: agent beat Amber SmartShift's actual dispatch by $5.91/day — by correctly refusing to export when NSW1 prices were negative all week. The win is knowing when not to act.

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Markdown version of https://cerebralvalley.ai/e/built-with-4-7-hackathon/hackathon/gallery/53. Site index for agents: https://cerebralvalley.ai/llms.txt · full text: https://cerebralvalley.ai/llms-full.txt