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Mining Bitcoin with excess solar power at my yurt. System is 975w of panels on a 24v system with a 225ah battery bank. (Adding another 300w panel soon which will max out the 60a charge controller)

I'm currently using an M29 (whatsminer m20 hashboards in a S9 enclosure) with 2 of the hashboards unplugged to reduce the power consumption down to ~600w. On a clear sunny day I can mine for 5-6hrs.

Today, I started using the airflow and heat generated by the miner to help evaporate liquids in the collection tank of the composting toilet at the outhouse. The toilet system had an option to add electric evaporators but using a Bitcoin miner instead was worth a shot. Hard to beat hashing from the sun and getting some extra use out of the airflow and heat the same time! #plebminer #bitcoinmining #permies #permaculture #homesteading #grownostr #solarpower #offgrid #yurt #bitcoin #stackingfuntions

rev.hodl 2y ago

Got a good deal on a 300w panel to add to the solar array at the yurt. Now on a sunny day the system can produce over 1200w which means I can plug in a second hashboard on the m29 miner and double the hashrate. It's been mostly cloudy with some sun peeking through for a few hours here and there since I installed the new panel. I have to say, I can't wait for a sunny day to see how the system does at double the power; double the hashrate while using the airflow and heat to evaporate the liquids in the composting toilet collection tank at the outhouse. For now, with the extra wattage, the batteries are able to stay charged even with guests using the power for several days in a row. Previously, it was likely that the low voltage disconnect tripped at some point during their stay.

#plebminer #bitcoin #solarpower #offgrid #bitcoinmining #yurt #doublespendenergy #stackingfunctions #permaculture #permies #grownostr

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Discussion

PermaNerd 🌱 💻 2y ago

Awesome

PalmTree 🌴 2y ago

Couldnt you eliminate the ps and power directly from 24vdc?

rev.hodl 2y ago

Would I need a step down converter to 12v? How much efficiency could I gain do you think?

PalmTree 🌴 2y ago

I assume your using an inverter. A step down to 12v would be much more efficient. Gave up mining to pos coins and just convert/flip to btc. More rewards, less power, no noise (though that is not a problem for you)

rev.hodl 2y ago

Yeah, I have an inverter, 3.5kw outback. I don't really know much about how to work with DC off the batteries directly, I wonder how much power I'm losing. Maybe I can go directly off the load from my charge controller, that can handle 60a. The step down would need to handle the 1200w load. Don't those cost a couple hundred dollars? Something like this:

Cllena DC 24V Step Down to 13.8V 100A 1380W Converter Voltage Regulator, Waterproof DC/DC Voltage Reducer Buck Transformer Power Supply for Golf Cart https://a.co/d/iOVhds6

PalmTree 🌴 2y ago

Wow, thats interesting. So its 95% eff. What the inverter % eff?I'm dissapointed they dont have a 48vdc to 12vdc with that many amps. largest one i could find was 60amps.

rev.hodl 2y ago

Something like 93% on the inverter. I don't think it's worth it to get the converter with my setup. It will take a long time to mine the sats back. Maybe worth considering when designing a system from scratch though. Probably best just to keep everything 12v in that situation though I suppose.