-PV-Mining Box Thread☀️⛏️ - Part #5:
100% renewable mining with a private Photovoltaic System (PV) over 6 months from summer to winter?
Let's crunch some numbers! What did I earn? How high was my Hashrate?
Earnings: 0,00359495 BTC. Yeah, that sucks. And it got worse to the end, Bitcoinhashrate always goes up. Halving next year…
Hashrate: something like 3,1 TH/s on average. SUCKS! Even if they only run @800W each, I should get 20TH/s out of them! Why is my Hashrate so low!?
Here’s why. Miners were only running for roughly 6 hours a day.
Many reasons. Wall-o-text incoming!
I've got 46 solarpanels à 370Wp, so 17kWp. We don't have a power battery 🔋, as they are fucking expensive! Primarily I bought the PV system to power my families' house, an EV and later on also a heat pump. Last year it produced ~18.000 kWh. Seems to be more than enough to fire up two S9 miners, right? Let's find out...
💯 💚🔋 means: The miners will only be active during daytime. To get as close to 100% renewable mining as possible, Home Assistant is trained to only activate the S9s if there's enough excess power, as we don't want to run the miners with power from the grid (which is not 💯 renewable...).
🌤️On a day in February with a mix of clouds AND sunshine the activity graph can look like this, screenshot is from January:
So even with such a big PV it is not possible to maintain 100% uptime of your miners during winterdays, if you want them to run on 100% renewables...
But there are good days in winter, too, right? Yeah, of course. But those days look like this, and now I expose myself as a blatant liar! 25th February:
You can see it. It’s not 100% green mining. There are peaks of power imports that I don’t care about, when they take less than a minute. Deal with it, Greta!
Key-Lesson of this whole Note?
For all of you dreaming of S9 miners powered by 2*300Wp panels: it will only work with direct sunlight ☀️ and good angles. Cloudy weather 🌦️☁️ means downtime or grid import...
Here's part #4 of this thread in case you missed it:
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