This is nothing specific to the CyberTruck; 123 kWh is a lot of battery but a better use would be to add home solar and then you're completely self-sufficient in addition to saving tons of money.

Of course there are two issues that are completely solveable if we had reasonable governance:

1. Adopting an Australia-style solar installation regulation and permitting scheme, which is literally 1/5th tho cost of the US method, and pays their tradespeolpe higher salaries than US workers get

2. Allowing EVs to feed back into the grid. This is something that naysayers would never be useful because nobody would ever want to waste battery cycles on their home. Which of course has always been nonsense. Don't buy EVs without this basic capability, IMHO.