> More efficiency is more money in my pocket, is it not for you?

Unfortunately, it isn't. I also inject surplus energy into the local power distribution network. In my country, I don't actually get paid for that. They give me "kWh credits" that I'm supposed to spend whenever I generare less energy than I consume. These credits will expire if unused, I can't accumulate them.

So it is simply not viable for any home or business to generate more power than they consume. I have space for more solar panels but I'd be giving the power companies free energy if I installed them.

Cryprocurrency is the perfect solution for my problem. Instead of giving them my energy surplus, I sink it into my computers instead so they can mine cryptocurrency. If the waste heat could be reused somehow, it would be even better...