What's the best use for "excess" energy? Image: Shutterstock.For Bitcoin miners the motive to power their operations with renewables is clear–it's economical. Per data from MacroMicro, it costs $26,979 to mine a Bitcoin on average. With the price of the leading cryptocurrency hovering around $28,500, cutting costs is key to fattening miners’ margins. Mining outfits that can tap cheaper energy powered by renewables, such as wind, hydro, or nuclear, are thus at a clear advantage over ...