OK, this is an important info to me. In this case I would not need extra electronics besides the (cheap) remote controlled main plug.

Thanks for this detailed answer.

For shutting down/starting up the miners: If I use Off-the-shelf Miners without any changes and start/stop them by just cutting off the power. Will they restart automatically? And I am afraid they will overheat, wehn cooling is shut down without any extra time. In fact the Solar Manager offers to control switches to switch when enough surplus is expected.

But doing the math is very disappointing. I was on another mining calculator last night and if the ROI is about 1-3 EUR a day (which seems to be realistic when using older hardware in the range up to 500EUR) it takes of course very long to return the price of the Hardware.

And you are totally right, that the miner would only run for 6 (winter) to 10 hours a day, which will reduce the Return even more. Given that the difficulty rises it may happen that the hardware is getting less profitable within the next 2 years witout having repaid.

So I think I have to reconsider this. In a first step I will try to put all energy in a electric car (which I get in a few days). Then I will learn how much energy is left in reality and than I have to redo the math.

Thanks a lot again
Ronald

Hi,

I am quite new to all of this so please excuse some dumbness in the question.

The situation: I have a new Photovoltaic installation here in Germany. While electric power regularly costs about 25ct/KWh you only get less then 7ct/KWh for the power you send back into the grid. One could say it is completly wasted. On a normal day I normally have a power surplus of 10 to 30 kWh.

So mining came into my mind in order to do something reasonable with the power. At first I used a gaming PC with a RTX 3090 and abot 98MH/h but I am afraid it will burn down the graphics card quite quickly. So I wonder if it makes sense to buy Antminers from older generations cheap on ebay and put them online, when there is surplus power only. Due to the nature of solar power it is sometimes a lot, sometimes nothing. The good thing is that I can put them into the cellar where they may heat as they want and noise is also no problem.

Now the questions:

• Is it possible to remote control the miners in order to siwtch them on/off depending on the available power? (Using batteries ist much to expensive)
• Will older miners mine current bitcoin at all? (I think I read about changed algorhytms which may hinder them)
• Is there an easy way to calculate if a miner mines more than the 7ct/KWh that I would get by just propagating the energy back to the grid?

Thanks in advance
Ron