Yes, I get it, it's indeed a lot of surplus in the summer.
Long term storage would be the better solution, but batteries don't seems to be able to store a large amount of energy anyway. So in my opinion, it's really a tradeoff.
I looked into this. Even assuming PG&E's buy back rate is 50% of current numbers, the ASICs have an expected profitability horizon of over one year of uptime. I'm not convinced they'll be profitable much longer after that, since hash/kWh keeps improving.
Also, I bought the panels to reduce carbon emissions, and would rather sell the power back.
Long term storage would be the better solution, but batteries don't seems to be able to store a large amount of energy anyway. So in my opinion, it's really a tradeoff.
Maybe mine some bitcoins during summer? ;)