Seems an interesting field and opportunity during the next five decades.
But think about, you can minimze Security risks, If you may follow the old rule: Think global - Act local.... Means, use the Energy at the harvesting point....
If the Consumer is using his own harvested Energy, using the full cleantech opps, creating Network independent systems like an Energy harvesting system for a Single house in the wilderness, risks are minimized.
There can be a separate safe HOME network, similar to the systems, wie are using today, external Network is guided through with Firewall software... The user can define, how to connect to the Global grid, selling or B