Refers to battery packs of the Tesla Powerwall style — i.e. enough storage capacity to be able to do energy arbitrage and load balancing.
Will be settled based on best available source at the time. Only in-home energy storage will count. Electric car batteries do not count.
Trying to estimate it based on Europe and production realities: I couldn't find a reference to the number of single family homes in Sweden or Europe. Assume 70% of 200 million households in Europe are single family homes. That is 140 million homes. 5% would be 7 million homes. The global number Tesla Powerwall installed in 2020 was 100k, and in 2021 was 200k. I don't have data about other manufacturers. Based on this it seems the growth rate would need to be an average of almost 50% per year to meet 7 million (just for Europe). So, I am betting no.
@parhizj Good reasoning. For reference, Sweden has about 2 million single family houses https://www.scb.se/hitta-statistik/sverige-i-siffror/manniskorna-i-sverige/boende-i-sverige/
