It's probably more efficient from a pure economics perspective, but there are advantages to home batteries and other smaller scale installations.

• Planning approvals. Grid-level battery approvals can be slow and bottlenecked by too many proposals at once, and can be slowed or halted by community opposition. No such issue with home batteries.

• Decentralisation. A decentralised grid is more robust to problems happening in the grid. If a single big battery goes down it could cause issues, but it's unlikely that millions of home batteries will all go down at once.

• Having the battery close to the load is more efficient, and means that less transmission infrastructure will need to be built. This is also means that community opposition has less of an impact.

• Individuals can benefit (in the right configuration) by seamlessly mitigating short blackouts.

😁

tbf we have a good combination of both (or all 3 tbh: industrial scale batteries and community batteries and home batteries), a recent point data centres made was that because of excess solar power FIT's have gone to crap, but with DC's the demand goes up, the power becomes valuable again ... but it looks like batteries are already slurping up a significant amount of daytime excess and even starting to kill gas's role as a peaker:

https://aussie.zone/post/32561882