Fathom's bidirectional AC power can power your home (V2H)

[mark]

https://cnevpost.com/2026/06/30/ford-catl-backed-battery-plant-completed/
Can our technical posters tell anything about the battery size for the Fathom from this CATL update?

 

[JWedd]

That approach makes more sense, since it would require coordination with the utilities. Especially if you plan to charge with cheap power and return it when it is more expensive.

Using the Fathom as a home backup power supply would require nothing more than a utility cutoff.

In California (with the big public utilities, there are always exceptions) the NEM (solar) account has a meter that will electronically spin backwards. The solar system produces about 1 volt higher than whatever the utility is providing in order to ensure generation is flowing into the grid. The NEM meter doesn't know if it is solar, or a battery, that is feeding it. The accounting is done on the utility side, and the meters communicate remotely. A standard non-NEM meter isn't configured to accept backwards spinning; while a battery source can still supply power backwards, there won't be any credit from the utility. Any customer load would be offset, but for the most part, there is little benefit without the NEM meter. Plus, there are also safety factors at play: the customer owned power source (whether solar, battery, wind, etc.) must recognize a no power condition and disconnect from the grid. Appropriate labelling is required too, so emergency and utility personnel know how to approach a situation.

Thus the caveats regarding utility approval.