One thing that gets glossed over when people talk renewable + mining: the power is only "cheap" if the site stays online.
We've run small fleets on free / near-free power before. The economics look great on a spreadsheet, then a breaker trips overnight and you lose half a day before anyone notices. Renewable sites also tend to have more variable load (solar dips, generator hiccups, weird voltage), so reject rates and thermal throttling show up faster than on a clean grid rack.
Practical checklist we use:
- Track actual TH vs what the pool shows (don't trust the miner UI alone)
- Alert on offline + high reject %, not just "hashrate low"
- Recalc break-even after difficulty moves — free power doesn't cancel a bad machine/pool combo
- If you're remote / multi-site, something has to page you when a box dies
We wrote up how we handle the monitoring side here (disclosure: we built Farm Manager for our own racks, free tier):
https://www.hashrate.farm/blog/hashrate-farm-manager-free-asic-monitoring-alerts-and-cloud-controlCurious what mix people here are actually on — solar + battery, hydro, flared gas, or just "landlord doesn't meter"?