I feel like I am missing something in your original question as to why you are questioning ac or dc as a source. The growatt has two inputs if it is like mine, solar and 120v ac. The chargers in them will put out a good bit of current (I think 60 amp for that size if i recall, maybe 40) from...
I think you need to break down your question in to a two sections, 1 - you need to educate yourself more on mining. 2 - How do I use my solar system to help cut opex costs. Plenty of information out there on mining. It is a nice passive income stream with what appears to be a relatively low...